2010-10-25 07:18:29 +08:00
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Following are change highlights associated with official releases. Important
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2015-07-08 00:33:22 +08:00
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bug fixes are all mentioned, but some internal enhancements are omitted here for
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brevity. Much more detail can be found in the git revision history:
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2010-10-25 07:18:29 +08:00
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2014-02-26 08:43:51 +08:00
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https://github.com/jemalloc/jemalloc
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2022-04-28 09:05:07 +08:00
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* 5.3.0 (May 6, 2022)
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This release contains many speed and space optimizations, from micro
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optimizations on common paths to rework of internal data structures and
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locking schemes, and many more too detailed to list below. Multiple percent
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of system level metric improvements were measured in tested production
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workloads. The release has gone through large-scale production testing.
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New features:
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- Add the thread.idle mallctl which hints that the calling thread will be
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idle for a nontrivial period of time. (@davidtgoldblatt)
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- Allow small size classes to be the maximum size class to cache in the
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thread-specific cache, through the opt.[lg_]tcache_max option. (@interwq,
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@jordalgo)
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- Make the behavior of realloc(ptr, 0) configurable with opt.zero_realloc.
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(@davidtgoldblatt)
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- Add 'make uninstall' support. (@sangshuduo, @Lapenkov)
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- Support C++17 over-aligned allocation. (@marksantaniello)
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- Add the thread.peak mallctl for approximate per-thread peak memory tracking.
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(@davidtgoldblatt)
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- Add interval-based stats output opt.stats_interval. (@interwq)
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- Add prof.prefix to override filename prefixes for dumps. (@zhxchen17)
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- Add high resolution timestamp support for profiling. (@tyroguru)
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- Add the --collapsed flag to jeprof for flamegraph generation.
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(@igorwwwwwwwwwwwwwwwwwwww)
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- Add the --debug-syms-by-id option to jeprof for debug symbols discovery.
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(@DeannaGelbart)
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- Add the opt.prof_leak_error option to exit with error code when leak is
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detected using opt.prof_final. (@yunxuo)
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- Add opt.cache_oblivious as an runtime alternative to config.cache_oblivious.
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(@interwq)
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- Add mallctl interfaces:
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+ opt.zero_realloc (@davidtgoldblatt)
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+ opt.cache_oblivious (@interwq)
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+ opt.prof_leak_error (@yunxuo)
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+ opt.stats_interval (@interwq)
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+ opt.stats_interval_opts (@interwq)
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+ opt.tcache_max (@interwq)
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+ opt.trust_madvise (@azat)
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+ prof.prefix (@zhxchen17)
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+ stats.zero_reallocs (@davidtgoldblatt)
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+ thread.idle (@davidtgoldblatt)
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+ thread.peak.{read,reset} (@davidtgoldblatt)
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Bug fixes:
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- Fix the synchronization around explicit tcache creation which could cause
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invalid tcache identifiers. This regression was first released in 5.0.0.
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(@yoshinorim, @davidtgoldblatt)
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- Fix a profiling biasing issue which could cause incorrect heap usage and
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object counts. This issue existed in all previous releases with the heap
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profiling feature. (@davidtgoldblatt)
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- Fix the order of stats counter updating on large realloc which could cause
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failed assertions. This regression was first released in 5.0.0. (@azat)
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- Fix the locking on the arena destroy mallctl, which could cause concurrent
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arena creations to fail. This functionality was first introduced in 5.0.0.
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(@interwq)
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Portability improvements:
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- Remove nothrow from system function declarations on macOS and FreeBSD.
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(@davidtgoldblatt, @fredemmott, @leres)
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- Improve overcommit and page alignment settings on NetBSD. (@zoulasc)
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- Improve CPU affinity support on BSD platforms. (@devnexen)
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- Improve utrace detection and support. (@devnexen)
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- Improve QEMU support with MADV_DONTNEED zeroed pages detection. (@azat)
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- Add memcntl support on Solaris / illumos. (@devnexen)
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- Improve CPU_SPINWAIT on ARM. (@AWSjswinney)
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- Improve TSD cleanup on FreeBSD. (@Lapenkov)
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- Disable percpu_arena if the CPU count cannot be reliably detected. (@azat)
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- Add malloc_size(3) override support. (@devnexen)
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- Add mmap VM_MAKE_TAG support. (@devnexen)
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- Add support for MADV_[NO]CORE. (@devnexen)
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- Add support for DragonFlyBSD. (@devnexen)
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- Fix the QUANTUM setting on MIPS64. (@brooksdavis)
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- Add the QUANTUM setting for ARC. (@vineetgarc)
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- Add the QUANTUM setting for LoongArch. (@wangjl-uos)
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- Add QNX support. (@jqian-aurora)
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- Avoid atexit(3) calls unless the relevant profiling features are enabled.
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(@BusyJay, @laiwei-rice, @interwq)
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- Fix unknown option detection when using Clang. (@Lapenkov)
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- Fix symbol conflict with musl libc. (@georgthegreat)
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- Add -Wimplicit-fallthrough checks. (@nickdesaulniers)
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- Add __forceinline support on MSVC. (@santagada)
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- Improve FreeBSD and Windows CI support. (@Lapenkov)
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- Add CI support for PPC64LE architecture. (@ezeeyahoo)
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Incompatible changes:
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- Maximum size class allowed in tcache (opt.[lg_]tcache_max) now has an upper
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bound of 8MiB. (@interwq)
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Optimizations and refactors (@davidtgoldblatt, @Lapenkov, @interwq):
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- Optimize the common cases of the thread cache operations.
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- Optimize internal data structures, including RB tree and pairing heap.
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- Optimize the internal locking on extent management.
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- Extract and refactor the internal page allocator and interface modules.
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Documentation:
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- Fix doc build with --with-install-suffix. (@lawmurray, @interwq)
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- Add PROFILING_INTERNALS.md. (@davidtgoldblatt)
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- Ensure the proper order of doc building and installation. (@Mingli-Yu)
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2019-07-30 02:30:30 +08:00
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* 5.2.1 (August 5, 2019)
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This release is primarily about Windows. A critical virtual memory leak is
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resolved on all Windows platforms. The regression was present in all releases
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since 5.0.0.
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Bug fixes:
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- Fix a severe virtual memory leak on Windows. This regression was first
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released in 5.0.0. (@Ignition, @j0t, @frederik-h, @davidtgoldblatt,
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@interwq)
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- Fix size 0 handling in posix_memalign(). This regression was first released
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in 5.2.0. (@interwq)
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- Fix the prof_log unit test which may observe unexpected backtraces from
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compiler optimizations. The test was first added in 5.2.0. (@marxin,
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@gnzlbg, @interwq)
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- Fix the declaration of the extent_avail tree. This regression was first
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released in 5.1.0. (@zoulasc)
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- Fix an incorrect reference in jeprof. This functionality was first released
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in 3.0.0. (@prehistoric-penguin)
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- Fix an assertion on the deallocation fast-path. This regression was first
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released in 5.2.0. (@yinan1048576)
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- Fix the TLS_MODEL attribute in headers. This regression was first released
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in 5.0.0. (@zoulasc, @interwq)
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Optimizations and refactors:
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- Implement opt.retain on Windows and enable by default on 64-bit. (@interwq,
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@davidtgoldblatt)
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- Optimize away a branch on the operator delete[] path. (@mgrice)
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- Add format annotation to the format generator function. (@zoulasc)
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- Refactor and improve the size class header generation. (@yinan1048576)
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- Remove best fit. (@djwatson)
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- Avoid blocking on background thread locks for stats. (@oranagra, @interwq)
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2019-03-20 07:57:55 +08:00
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* 5.2.0 (April 2, 2019)
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This release includes a few notable improvements, which are summarized below:
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1) improved fast-path performance from the optimizations by @djwatson; 2)
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reduced virtual memory fragmentation and metadata usage; and 3) bug fixes on
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setting the number of background threads. In addition, peak / spike memory
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usage is improved with certain allocation patterns. As usual, the release and
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prior dev versions have gone through large-scale production testing.
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New features:
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- Implement oversize_threshold, which uses a dedicated arena for allocations
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crossing the specified threshold to reduce fragmentation. (@interwq)
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- Add extents usage information to stats. (@tyleretzel)
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- Log time information for sampled allocations. (@tyleretzel)
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- Support 0 size in sdallocx. (@djwatson)
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- Output rate for certain counters in malloc_stats. (@zinoale)
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- Add configure option --enable-readlinkat, which allows the use of readlinkat
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over readlink. (@davidtgoldblatt)
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- Add configure options --{enable,disable}-{static,shared} to allow not
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building unwanted libraries. (@Ericson2314)
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- Add configure option --disable-libdl to enable fully static builds.
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(@interwq)
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- Add mallctl interfaces:
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+ opt.oversize_threshold (@interwq)
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+ stats.arenas.<i>.extent_avail (@tyleretzel)
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+ stats.arenas.<i>.extents.<j>.n{dirty,muzzy,retained} (@tyleretzel)
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+ stats.arenas.<i>.extents.<j>.{dirty,muzzy,retained}_bytes
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(@tyleretzel)
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Portability improvements:
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- Update MSVC builds. (@maksqwe, @rustyx)
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- Workaround a compiler optimizer bug on s390x. (@rkmisra)
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- Make use of pthread_set_name_np(3) on FreeBSD. (@trasz)
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- Implement malloc_getcpu() to enable percpu_arena for windows. (@santagada)
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- Link against -pthread instead of -lpthread. (@paravoid)
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- Make background_thread not dependent on libdl. (@interwq)
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- Add stringify to fix a linker directive issue on MSVC. (@daverigby)
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- Detect and fall back when 8-bit atomics are unavailable. (@interwq)
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- Fall back to the default pthread_create if dlsym(3) fails. (@interwq)
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Optimizations and refactors:
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- Refactor the TSD module. (@davidtgoldblatt)
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- Avoid taking extents_muzzy mutex when muzzy is disabled. (@interwq)
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- Avoid taking large_mtx for auto arenas on the tcache flush path. (@interwq)
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- Optimize ixalloc by avoiding a size lookup. (@interwq)
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- Implement opt.oversize_threshold which uses a dedicated arena for requests
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crossing the threshold, also eagerly purges the oversize extents. Default
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the threshold to 8 MiB. (@interwq)
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- Clean compilation with -Wextra. (@gnzlbg, @jasone)
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- Refactor the size class module. (@davidtgoldblatt)
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- Refactor the stats emitter. (@tyleretzel)
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- Optimize pow2_ceil. (@rkmisra)
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- Avoid runtime detection of lazy purging on FreeBSD. (@trasz)
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- Optimize mmap(2) alignment handling on FreeBSD. (@trasz)
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- Improve error handling for THP state initialization. (@jsteemann)
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- Rework the malloc() fast path. (@djwatson)
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- Rework the free() fast path. (@djwatson)
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- Refactor and optimize the tcache fill / flush paths. (@djwatson)
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- Optimize sync / lwsync on PowerPC. (@chmeeedalf)
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- Bypass extent_dalloc() when retain is enabled. (@interwq)
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- Optimize the locking on large deallocation. (@interwq)
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- Reduce the number of pages committed from sanity checking in debug build.
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(@trasz, @interwq)
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- Deprecate OSSpinLock. (@interwq)
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- Lower the default number of background threads to 4 (when the feature
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is enabled). (@interwq)
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- Optimize the trylock spin wait. (@djwatson)
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- Use arena index for arena-matching checks. (@interwq)
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- Avoid forced decay on thread termination when using background threads.
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(@interwq)
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- Disable muzzy decay by default. (@djwatson, @interwq)
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- Only initialize libgcc unwinder when profiling is enabled. (@paravoid,
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@interwq)
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Bug fixes (all only relevant to jemalloc 5.x):
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- Fix background thread index issues with max_background_threads. (@djwatson,
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@interwq)
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- Fix stats output for opt.lg_extent_max_active_fit. (@interwq)
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- Fix opt.prof_prefix initialization. (@davidtgoldblatt)
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- Properly trigger decay on tcache destroy. (@interwq, @amosbird)
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- Fix tcache.flush. (@interwq)
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- Detect whether explicit extent zero out is necessary with huge pages or
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custom extent hooks, which may change the purge semantics. (@interwq)
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- Fix a side effect caused by extent_max_active_fit combined with decay-based
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purging, where freed extents can accumulate and not be reused for an
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extended period of time. (@interwq, @mpghf)
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- Fix a missing unlock on extent register error handling. (@zoulasc)
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Testing:
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- Simplify the Travis script output. (@gnzlbg)
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- Update the test scripts for FreeBSD. (@devnexen)
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- Add unit tests for the producer-consumer pattern. (@interwq)
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- Add Cirrus-CI config for FreeBSD builds. (@jasone)
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- Add size-matching sanity checks on tcache flush. (@davidtgoldblatt,
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@interwq)
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Incompatible changes:
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- Remove --with-lg-page-sizes. (@davidtgoldblatt)
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Documentation:
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- Attempt to build docs by default, however skip doc building when xsltproc
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is missing. (@interwq, @cmuellner)
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* 5.1.0 (May 4, 2018)
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2018-05-03 05:34:19 +08:00
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This release is primarily about fine-tuning, ranging from several new features
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to numerous notable performance and portability enhancements. The release and
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prior dev versions have been running in multiple large scale applications for
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months, and the cumulative improvements are substantial in many cases.
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Given the long and successful production runs, this release is likely a good
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candidate for applications to upgrade, from both jemalloc 5.0 and before. For
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performance-critical applications, the newly added TUNING.md provides
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guidelines on jemalloc tuning.
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New features:
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- Implement transparent huge page support for internal metadata. (@interwq)
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- Add opt.thp to allow enabling / disabling transparent huge pages for all
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mappings. (@interwq)
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- Add maximum background thread count option. (@djwatson)
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- Allow prof_active to control opt.lg_prof_interval and prof.gdump.
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(@interwq)
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- Allow arena index lookup based on allocation addresses via mallctl.
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(@lionkov)
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- Allow disabling initial-exec TLS model. (@davidtgoldblatt, @KenMacD)
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- Add opt.lg_extent_max_active_fit to set the max ratio between the size of
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the active extent selected (to split off from) and the size of the requested
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allocation. (@interwq, @davidtgoldblatt)
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- Add retain_grow_limit to set the max size when growing virtual address
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space. (@interwq)
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- Add mallctl interfaces:
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+ arena.<i>.retain_grow_limit (@interwq)
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|
|
|
+ arenas.lookup (@lionkov)
|
|
|
|
|
+ max_background_threads (@djwatson)
|
|
|
|
|
+ opt.lg_extent_max_active_fit (@interwq)
|
|
|
|
|
+ opt.max_background_threads (@djwatson)
|
|
|
|
|
+ opt.metadata_thp (@interwq)
|
|
|
|
|
+ opt.thp (@interwq)
|
|
|
|
|
+ stats.metadata_thp (@interwq)
|
|
|
|
|
|
|
|
|
|
Portability improvements:
|
|
|
|
|
- Support GNU/kFreeBSD configuration. (@paravoid)
|
|
|
|
|
- Support m68k, nios2 and SH3 architectures. (@paravoid)
|
|
|
|
|
- Fall back to FD_CLOEXEC when O_CLOEXEC is unavailable. (@zonyitoo)
|
|
|
|
|
- Fix symbol listing for cross-compiling. (@tamird)
|
|
|
|
|
- Fix high bits computation on ARM. (@davidtgoldblatt, @paravoid)
|
|
|
|
|
- Disable the CPU_SPINWAIT macro for Power. (@davidtgoldblatt, @marxin)
|
|
|
|
|
- Fix MSVC 2015 & 2017 builds. (@rustyx)
|
|
|
|
|
- Improve RISC-V support. (@EdSchouten)
|
|
|
|
|
- Set name mangling script in strict mode. (@nicolov)
|
|
|
|
|
- Avoid MADV_HUGEPAGE on ARM. (@marxin)
|
|
|
|
|
- Modify configure to determine return value of strerror_r.
|
|
|
|
|
(@davidtgoldblatt, @cferris1000)
|
|
|
|
|
- Make sure CXXFLAGS is tested with CPP compiler. (@nehaljwani)
|
|
|
|
|
- Fix 32-bit build on MSVC. (@rustyx)
|
|
|
|
|
- Fix external symbol on MSVC. (@maksqwe)
|
|
|
|
|
- Avoid a printf format specifier warning. (@jasone)
|
|
|
|
|
- Add configure option --disable-initial-exec-tls which can allow jemalloc to
|
|
|
|
|
be dynamically loaded after program startup. (@davidtgoldblatt, @KenMacD)
|
|
|
|
|
- AArch64: Add ILP32 support. (@cmuellner)
|
|
|
|
|
- Add --with-lg-vaddr configure option to support cross compiling.
|
|
|
|
|
(@cmuellner, @davidtgoldblatt)
|
|
|
|
|
|
|
|
|
|
Optimizations and refactors:
|
|
|
|
|
- Improve active extent fit with extent_max_active_fit. This considerably
|
|
|
|
|
reduces fragmentation over time and improves virtual memory and metadata
|
|
|
|
|
usage. (@davidtgoldblatt, @interwq)
|
|
|
|
|
- Eagerly coalesce large extents to reduce fragmentation. (@interwq)
|
|
|
|
|
- sdallocx: only read size info when page aligned (i.e. possibly sampled),
|
|
|
|
|
which speeds up the sized deallocation path significantly. (@interwq)
|
|
|
|
|
- Avoid attempting new mappings for in place expansion with retain, since
|
|
|
|
|
it rarely succeeds in practice and causes high overhead. (@interwq)
|
|
|
|
|
- Refactor OOM handling in newImpl. (@wqfish)
|
|
|
|
|
- Add internal fine-grained logging functionality for debugging use.
|
|
|
|
|
(@davidtgoldblatt)
|
|
|
|
|
- Refactor arena / tcache interactions. (@davidtgoldblatt)
|
|
|
|
|
- Refactor extent management with dumpable flag. (@davidtgoldblatt)
|
|
|
|
|
- Add runtime detection of lazy purging. (@interwq)
|
|
|
|
|
- Use pairing heap instead of red-black tree for extents_avail. (@djwatson)
|
|
|
|
|
- Use sysctl on startup in FreeBSD. (@trasz)
|
|
|
|
|
- Use thread local prng state instead of atomic. (@djwatson)
|
|
|
|
|
- Make decay to always purge one more extent than before, because in
|
|
|
|
|
practice large extents are usually the ones that cross the decay threshold.
|
|
|
|
|
Purging the additional extent helps save memory as well as reduce VM
|
|
|
|
|
fragmentation. (@interwq)
|
|
|
|
|
- Fast division by dynamic values. (@davidtgoldblatt)
|
|
|
|
|
- Improve the fit for aligned allocation. (@interwq, @edwinsmith)
|
|
|
|
|
- Refactor extent_t bitpacking. (@rkmisra)
|
|
|
|
|
- Optimize the generated assembly for ticker operations. (@davidtgoldblatt)
|
|
|
|
|
- Convert stats printing to use a structured text emitter. (@davidtgoldblatt)
|
|
|
|
|
- Remove preserve_lru feature for extents management. (@djwatson)
|
|
|
|
|
- Consolidate two memory loads into one on the fast deallocation path.
|
|
|
|
|
(@davidtgoldblatt, @interwq)
|
|
|
|
|
|
|
|
|
|
Bug fixes (most of the issues are only relevant to jemalloc 5.0):
|
|
|
|
|
- Fix deadlock with multithreaded fork in OS X. (@davidtgoldblatt)
|
|
|
|
|
- Validate returned file descriptor before use. (@zonyitoo)
|
|
|
|
|
- Fix a few background thread initialization and shutdown issues. (@interwq)
|
|
|
|
|
- Fix an extent coalesce + decay race by taking both coalescing extents off
|
|
|
|
|
the LRU list. (@interwq)
|
|
|
|
|
- Fix potentially unbound increase during decay, caused by one thread keep
|
|
|
|
|
stashing memory to purge while other threads generating new pages. The
|
|
|
|
|
number of pages to purge is checked to prevent this. (@interwq)
|
|
|
|
|
- Fix a FreeBSD bootstrap assertion. (@strejda, @interwq)
|
|
|
|
|
- Handle 32 bit mutex counters. (@rkmisra)
|
|
|
|
|
- Fix a indexing bug when creating background threads. (@davidtgoldblatt,
|
|
|
|
|
@binliu19)
|
|
|
|
|
- Fix arguments passed to extent_init. (@yuleniwo, @interwq)
|
|
|
|
|
- Fix addresses used for ordering mutexes. (@rkmisra)
|
|
|
|
|
- Fix abort_conf processing during bootstrap. (@interwq)
|
|
|
|
|
- Fix include path order for out-of-tree builds. (@cmuellner)
|
|
|
|
|
|
|
|
|
|
Incompatible changes:
|
|
|
|
|
- Remove --disable-thp. (@interwq)
|
|
|
|
|
- Remove mallctl interfaces:
|
|
|
|
|
+ config.thp (@interwq)
|
|
|
|
|
|
|
|
|
|
Documentation:
|
|
|
|
|
- Add TUNING.md. (@interwq, @davidtgoldblatt, @djwatson)
|
|
|
|
|
|
2017-07-02 08:12:05 +08:00
|
|
|
* 5.0.1 (July 1, 2017)
|
|
|
|
|
|
|
|
|
|
This bugfix release fixes several issues, most of which are obscure enough
|
|
|
|
|
that typical applications are not impacted.
|
|
|
|
|
|
|
|
|
|
Bug fixes:
|
|
|
|
|
- Update decay->nunpurged before purging, in order to avoid potential update
|
|
|
|
|
races and subsequent incorrect purging volume. (@interwq)
|
|
|
|
|
- Only abort on dlsym(3) error if the failure impacts an enabled feature (lazy
|
|
|
|
|
locking and/or background threads). This mitigates an initialization
|
|
|
|
|
failure bug for which we still do not have a clear reproduction test case.
|
|
|
|
|
(@interwq)
|
|
|
|
|
- Modify tsd management so that it neither crashes nor leaks if a thread's
|
|
|
|
|
only allocation activity is to call free() after TLS destructors have been
|
|
|
|
|
executed. This behavior was observed when operating with GNU libc, and is
|
|
|
|
|
unlikely to be an issue with other libc implementations. (@interwq)
|
|
|
|
|
- Mask signals during background thread creation. This prevents signals from
|
|
|
|
|
being inadvertently delivered to background threads. (@jasone,
|
2017-07-03 08:55:52 +08:00
|
|
|
@davidtgoldblatt, @interwq)
|
2017-07-02 08:12:05 +08:00
|
|
|
- Avoid inactivity checks within background threads, in order to prevent
|
|
|
|
|
recursive mutex acquisition. (@interwq)
|
|
|
|
|
- Fix extent_grow_retained() to use the specified hooks when the
|
|
|
|
|
arena.<i>.extent_hooks mallctl is used to override the default hooks.
|
|
|
|
|
(@interwq)
|
|
|
|
|
- Add missing reentrancy support for custom extent hooks which allocate.
|
|
|
|
|
(@interwq)
|
|
|
|
|
- Post-fork(2), re-initialize the list of tcaches associated with each arena
|
|
|
|
|
to contain no tcaches except the forking thread's. (@interwq)
|
|
|
|
|
- Add missing post-fork(2) mutex reinitialization for extent_grow_mtx. This
|
|
|
|
|
fixes potential deadlocks after fork(2). (@interwq)
|
|
|
|
|
- Enforce minimum autoconf version (currently 2.68), since 2.63 is known to
|
|
|
|
|
generate corrupt configure scripts. (@jasone)
|
|
|
|
|
- Ensure that the configured page size (--with-lg-page) is no larger than the
|
|
|
|
|
configured huge page size (--with-lg-hugepage). (@jasone)
|
|
|
|
|
|
2017-06-10 00:41:09 +08:00
|
|
|
* 5.0.0 (June 13, 2017)
|
|
|
|
|
|
|
|
|
|
Unlike all previous jemalloc releases, this release does not use naturally
|
|
|
|
|
aligned "chunks" for virtual memory management, and instead uses page-aligned
|
|
|
|
|
"extents". This change has few externally visible effects, but the internal
|
|
|
|
|
impacts are... extensive. Many other internal changes combine to make this
|
|
|
|
|
the most cohesively designed version of jemalloc so far, with ample
|
|
|
|
|
opportunity for further enhancements.
|
|
|
|
|
|
|
|
|
|
Continuous integration is now an integral aspect of development thanks to the
|
|
|
|
|
efforts of @davidtgoldblatt, and the dev branch tends to remain reasonably
|
|
|
|
|
stable on the tested platforms (Linux, FreeBSD, macOS, and Windows). As a
|
|
|
|
|
side effect the official release frequency may decrease over time.
|
|
|
|
|
|
|
|
|
|
New features:
|
|
|
|
|
- Implement optional per-CPU arena support; threads choose which arena to use
|
|
|
|
|
based on current CPU rather than on fixed thread-->arena associations.
|
|
|
|
|
(@interwq)
|
|
|
|
|
- Implement two-phase decay of unused dirty pages. Pages transition from
|
|
|
|
|
dirty-->muzzy-->clean, where the first phase transition relies on
|
|
|
|
|
madvise(... MADV_FREE) semantics, and the second phase transition discards
|
|
|
|
|
pages such that they are replaced with demand-zeroed pages on next access.
|
|
|
|
|
(@jasone)
|
|
|
|
|
- Increase decay time resolution from seconds to milliseconds. (@jasone)
|
|
|
|
|
- Implement opt-in per CPU background threads, and use them for asynchronous
|
|
|
|
|
decay-driven unused dirty page purging. (@interwq)
|
|
|
|
|
- Add mutex profiling, which collects a variety of statistics useful for
|
|
|
|
|
diagnosing overhead/contention issues. (@interwq)
|
|
|
|
|
- Add C++ new/delete operator bindings. (@djwatson)
|
|
|
|
|
- Support manually created arena destruction, such that all data and metadata
|
|
|
|
|
are discarded. Add MALLCTL_ARENAS_DESTROYED for accessing merged stats
|
|
|
|
|
associated with destroyed arenas. (@jasone)
|
|
|
|
|
- Add MALLCTL_ARENAS_ALL as a fixed index for use in accessing
|
|
|
|
|
merged/destroyed arena statistics via mallctl. (@jasone)
|
|
|
|
|
- Add opt.abort_conf to optionally abort if invalid configuration options are
|
|
|
|
|
detected during initialization. (@interwq)
|
|
|
|
|
- Add opt.stats_print_opts, so that e.g. JSON output can be selected for the
|
|
|
|
|
stats dumped during exit if opt.stats_print is true. (@jasone)
|
|
|
|
|
- Add --with-version=VERSION for use when embedding jemalloc into another
|
|
|
|
|
project's git repository. (@jasone)
|
|
|
|
|
- Add --disable-thp to support cross compiling. (@jasone)
|
|
|
|
|
- Add --with-lg-hugepage to support cross compiling. (@jasone)
|
|
|
|
|
- Add mallctl interfaces (various authors):
|
|
|
|
|
+ background_thread
|
|
|
|
|
+ opt.abort_conf
|
|
|
|
|
+ opt.retain
|
|
|
|
|
+ opt.percpu_arena
|
|
|
|
|
+ opt.background_thread
|
|
|
|
|
+ opt.{dirty,muzzy}_decay_ms
|
|
|
|
|
+ opt.stats_print_opts
|
|
|
|
|
+ arena.<i>.initialized
|
|
|
|
|
+ arena.<i>.destroy
|
|
|
|
|
+ arena.<i>.{dirty,muzzy}_decay_ms
|
|
|
|
|
+ arena.<i>.extent_hooks
|
|
|
|
|
+ arenas.{dirty,muzzy}_decay_ms
|
|
|
|
|
+ arenas.bin.<i>.slab_size
|
|
|
|
|
+ arenas.nlextents
|
|
|
|
|
+ arenas.lextent.<i>.size
|
|
|
|
|
+ arenas.create
|
|
|
|
|
+ stats.background_thread.{num_threads,num_runs,run_interval}
|
|
|
|
|
+ stats.mutexes.{ctl,background_thread,prof,reset}.
|
|
|
|
|
{num_ops,num_spin_acq,num_wait,max_wait_time,total_wait_time,max_num_thds,
|
|
|
|
|
num_owner_switch}
|
|
|
|
|
+ stats.arenas.<i>.{dirty,muzzy}_decay_ms
|
|
|
|
|
+ stats.arenas.<i>.uptime
|
|
|
|
|
+ stats.arenas.<i>.{pmuzzy,base,internal,resident}
|
|
|
|
|
+ stats.arenas.<i>.{dirty,muzzy}_{npurge,nmadvise,purged}
|
|
|
|
|
+ stats.arenas.<i>.bins.<j>.{nslabs,reslabs,curslabs}
|
|
|
|
|
+ stats.arenas.<i>.bins.<j>.mutex.
|
|
|
|
|
{num_ops,num_spin_acq,num_wait,max_wait_time,total_wait_time,max_num_thds,
|
|
|
|
|
num_owner_switch}
|
|
|
|
|
+ stats.arenas.<i>.lextents.<j>.{nmalloc,ndalloc,nrequests,curlextents}
|
|
|
|
|
+ stats.arenas.i.mutexes.{large,extent_avail,extents_dirty,extents_muzzy,
|
|
|
|
|
extents_retained,decay_dirty,decay_muzzy,base,tcache_list}.
|
|
|
|
|
{num_ops,num_spin_acq,num_wait,max_wait_time,total_wait_time,max_num_thds,
|
|
|
|
|
num_owner_switch}
|
|
|
|
|
|
|
|
|
|
Portability improvements:
|
|
|
|
|
- Improve reentrant allocation support, such that deadlock is less likely if
|
|
|
|
|
e.g. a system library call in turn allocates memory. (@davidtgoldblatt,
|
|
|
|
|
@interwq)
|
|
|
|
|
- Support static linking of jemalloc with glibc. (@djwatson)
|
|
|
|
|
|
|
|
|
|
Optimizations and refactors:
|
|
|
|
|
- Organize virtual memory as "extents" of virtual memory pages, rather than as
|
|
|
|
|
naturally aligned "chunks", and store all metadata in arbitrarily distant
|
|
|
|
|
locations. This reduces virtual memory external fragmentation, and will
|
|
|
|
|
interact better with huge pages (not yet explicitly supported). (@jasone)
|
|
|
|
|
- Fold large and huge size classes together; only small and large size classes
|
|
|
|
|
remain. (@jasone)
|
|
|
|
|
- Unify the allocation paths, and merge most fast-path branching decisions.
|
|
|
|
|
(@davidtgoldblatt, @interwq)
|
|
|
|
|
- Embed per thread automatic tcache into thread-specific data, which reduces
|
|
|
|
|
conditional branches and dereferences. Also reorganize tcache to increase
|
|
|
|
|
fast-path data locality. (@interwq)
|
|
|
|
|
- Rewrite atomics to closely model the C11 API, convert various
|
|
|
|
|
synchronization from mutex-based to atomic, and use the explicit memory
|
|
|
|
|
ordering control to resolve various hypothetical races without increasing
|
|
|
|
|
synchronization overhead. (@davidtgoldblatt)
|
|
|
|
|
- Extensively optimize rtree via various methods:
|
|
|
|
|
+ Add multiple layers of rtree lookup caching, since rtree lookups are now
|
|
|
|
|
part of fast-path deallocation. (@interwq)
|
|
|
|
|
+ Determine rtree layout at compile time. (@jasone)
|
|
|
|
|
+ Make the tree shallower for common configurations. (@jasone)
|
|
|
|
|
+ Embed the root node in the top-level rtree data structure, thus avoiding
|
|
|
|
|
one level of indirection. (@jasone)
|
|
|
|
|
+ Further specialize leaf elements as compared to internal node elements,
|
|
|
|
|
and directly embed extent metadata needed for fast-path deallocation.
|
|
|
|
|
(@jasone)
|
|
|
|
|
+ Ignore leading always-zero address bits (architecture-specific).
|
|
|
|
|
(@jasone)
|
|
|
|
|
- Reorganize headers (ongoing work) to make them hermetic, and disentangle
|
|
|
|
|
various module dependencies. (@davidtgoldblatt)
|
|
|
|
|
- Convert various internal data structures such as size class metadata from
|
|
|
|
|
boot-time-initialized to compile-time-initialized. Propagate resulting data
|
|
|
|
|
structure simplifications, such as making arena metadata fixed-size.
|
|
|
|
|
(@jasone)
|
|
|
|
|
- Simplify size class lookups when constrained to size classes that are
|
|
|
|
|
multiples of the page size. This speeds lookups, but the primary benefit is
|
|
|
|
|
complexity reduction in code that was the source of numerous regressions.
|
|
|
|
|
(@jasone)
|
|
|
|
|
- Lock individual extents when possible for localized extent operations,
|
|
|
|
|
rather than relying on a top-level arena lock. (@davidtgoldblatt, @jasone)
|
|
|
|
|
- Use first fit layout policy instead of best fit, in order to improve
|
|
|
|
|
packing. (@jasone)
|
|
|
|
|
- If munmap(2) is not in use, use an exponential series to grow each arena's
|
|
|
|
|
virtual memory, so that the number of disjoint virtual memory mappings
|
|
|
|
|
remains low. (@jasone)
|
|
|
|
|
- Implement per arena base allocators, so that arenas never share any virtual
|
|
|
|
|
memory pages. (@jasone)
|
|
|
|
|
- Automatically generate private symbol name mangling macros. (@jasone)
|
|
|
|
|
|
|
|
|
|
Incompatible changes:
|
|
|
|
|
- Replace chunk hooks with an expanded/normalized set of extent hooks.
|
|
|
|
|
(@jasone)
|
|
|
|
|
- Remove ratio-based purging. (@jasone)
|
|
|
|
|
- Remove --disable-tcache. (@jasone)
|
|
|
|
|
- Remove --disable-tls. (@jasone)
|
|
|
|
|
- Remove --enable-ivsalloc. (@jasone)
|
|
|
|
|
- Remove --with-lg-size-class-group. (@jasone)
|
|
|
|
|
- Remove --with-lg-tiny-min. (@jasone)
|
|
|
|
|
- Remove --disable-cc-silence. (@jasone)
|
|
|
|
|
- Remove --enable-code-coverage. (@jasone)
|
|
|
|
|
- Remove --disable-munmap (replaced by opt.retain). (@jasone)
|
|
|
|
|
- Remove Valgrind support. (@jasone)
|
|
|
|
|
- Remove quarantine support. (@jasone)
|
|
|
|
|
- Remove redzone support. (@jasone)
|
|
|
|
|
- Remove mallctl interfaces (various authors):
|
|
|
|
|
+ config.munmap
|
|
|
|
|
+ config.tcache
|
|
|
|
|
+ config.tls
|
|
|
|
|
+ config.valgrind
|
|
|
|
|
+ opt.lg_chunk
|
|
|
|
|
+ opt.purge
|
|
|
|
|
+ opt.lg_dirty_mult
|
|
|
|
|
+ opt.decay_time
|
|
|
|
|
+ opt.quarantine
|
|
|
|
|
+ opt.redzone
|
|
|
|
|
+ opt.thp
|
|
|
|
|
+ arena.<i>.lg_dirty_mult
|
|
|
|
|
+ arena.<i>.decay_time
|
|
|
|
|
+ arena.<i>.chunk_hooks
|
|
|
|
|
+ arenas.initialized
|
|
|
|
|
+ arenas.lg_dirty_mult
|
|
|
|
|
+ arenas.decay_time
|
|
|
|
|
+ arenas.bin.<i>.run_size
|
|
|
|
|
+ arenas.nlruns
|
|
|
|
|
+ arenas.lrun.<i>.size
|
|
|
|
|
+ arenas.nhchunks
|
|
|
|
|
+ arenas.hchunk.<i>.size
|
|
|
|
|
+ arenas.extend
|
|
|
|
|
+ stats.cactive
|
|
|
|
|
+ stats.arenas.<i>.lg_dirty_mult
|
|
|
|
|
+ stats.arenas.<i>.decay_time
|
|
|
|
|
+ stats.arenas.<i>.metadata.{mapped,allocated}
|
|
|
|
|
+ stats.arenas.<i>.{npurge,nmadvise,purged}
|
|
|
|
|
+ stats.arenas.<i>.huge.{allocated,nmalloc,ndalloc,nrequests}
|
|
|
|
|
+ stats.arenas.<i>.bins.<j>.{nruns,reruns,curruns}
|
|
|
|
|
+ stats.arenas.<i>.lruns.<j>.{nmalloc,ndalloc,nrequests,curruns}
|
|
|
|
|
+ stats.arenas.<i>.hchunks.<j>.{nmalloc,ndalloc,nrequests,curhchunks}
|
|
|
|
|
|
|
|
|
|
Bug fixes:
|
|
|
|
|
- Improve interval-based profile dump triggering to dump only one profile when
|
|
|
|
|
a single allocation's size exceeds the interval. (@jasone)
|
|
|
|
|
- Use prefixed function names (as controlled by --with-jemalloc-prefix) when
|
|
|
|
|
pruning backtrace frames in jeprof. (@jasone)
|
|
|
|
|
|
2017-03-01 04:59:22 +08:00
|
|
|
* 4.5.0 (February 28, 2017)
|
|
|
|
|
|
|
|
|
|
This is the first release to benefit from much broader continuous integration
|
|
|
|
|
testing, thanks to @davidtgoldblatt. Had we had this testing infrastructure
|
|
|
|
|
in place for prior releases, it would have caught all of the most serious
|
|
|
|
|
regressions fixed by this release.
|
|
|
|
|
|
|
|
|
|
New features:
|
2017-03-01 11:24:08 +08:00
|
|
|
- Add --disable-thp and the opt.thp mallctl to provide opt-out mechanisms for
|
2017-03-01 04:59:22 +08:00
|
|
|
transparent huge page integration. (@jasone)
|
|
|
|
|
- Update zone allocator integration to work with macOS 10.12. (@glandium)
|
|
|
|
|
- Restructure *CFLAGS configuration, so that CFLAGS behaves typically, and
|
|
|
|
|
EXTRA_CFLAGS provides a way to specify e.g. -Werror during building, but not
|
|
|
|
|
during configuration. (@jasone, @ronawho)
|
|
|
|
|
|
|
|
|
|
Bug fixes:
|
|
|
|
|
- Fix DSS (sbrk(2)-based) allocation. This regression was first released in
|
|
|
|
|
4.3.0. (@jasone)
|
|
|
|
|
- Handle race in per size class utilization computation. This functionality
|
|
|
|
|
was first released in 4.0.0. (@interwq)
|
|
|
|
|
- Fix lock order reversal during gdump. (@jasone)
|
2017-03-01 11:24:08 +08:00
|
|
|
- Fix/refactor tcache synchronization. This regression was first released in
|
2017-03-01 04:59:22 +08:00
|
|
|
4.0.0. (@jasone)
|
|
|
|
|
- Fix various JSON-formatted malloc_stats_print() bugs. This functionality
|
|
|
|
|
was first released in 4.3.0. (@jasone)
|
|
|
|
|
- Fix huge-aligned allocation. This regression was first released in 4.4.0.
|
|
|
|
|
(@jasone)
|
|
|
|
|
- When transparent huge page integration is enabled, detect what state pages
|
|
|
|
|
start in according to the kernel's current operating mode, and only convert
|
|
|
|
|
arena chunks to non-huge during purging if that is not their initial state.
|
|
|
|
|
This functionality was first released in 4.4.0. (@jasone)
|
|
|
|
|
- Fix lg_chunk clamping for the --enable-cache-oblivious --disable-fill case.
|
|
|
|
|
This regression was first released in 4.0.0. (@jasone, @428desmo)
|
|
|
|
|
- Properly detect sparc64 when building for Linux. (@glaubitz)
|
|
|
|
|
|
2016-12-04 04:22:59 +08:00
|
|
|
* 4.4.0 (December 3, 2016)
|
|
|
|
|
|
|
|
|
|
New features:
|
|
|
|
|
- Add configure support for *-*-linux-android. (@cferris1000, @jasone)
|
|
|
|
|
- Add the --disable-syscall configure option, for use on systems that place
|
|
|
|
|
security-motivated limitations on syscall(2). (@jasone)
|
|
|
|
|
- Add support for Debian GNU/kFreeBSD. (@thesam)
|
|
|
|
|
|
|
|
|
|
Optimizations:
|
|
|
|
|
- Add extent serial numbers and use them where appropriate as a sort key that
|
|
|
|
|
is higher priority than address, so that the allocation policy prefers older
|
|
|
|
|
extents. This tends to improve locality (decrease fragmentation) when
|
|
|
|
|
memory grows downward. (@jasone)
|
|
|
|
|
- Refactor madvise(2) configuration so that MADV_FREE is detected and utilized
|
|
|
|
|
on Linux 4.5 and newer. (@jasone)
|
|
|
|
|
- Mark partially purged arena chunks as non-huge-page. This improves
|
|
|
|
|
interaction with Linux's transparent huge page functionality. (@jasone)
|
|
|
|
|
|
|
|
|
|
Bug fixes:
|
|
|
|
|
- Fix size class computations for edge conditions involving extremely large
|
|
|
|
|
allocations. This regression was first released in 4.0.0. (@jasone,
|
|
|
|
|
@ingvarha)
|
|
|
|
|
- Remove overly restrictive assertions related to the cactive statistic. This
|
|
|
|
|
regression was first released in 4.1.0. (@jasone)
|
|
|
|
|
- Implement a more reliable detection scheme for os_unfair_lock on macOS.
|
|
|
|
|
(@jszakmeister)
|
|
|
|
|
|
2016-11-08 08:22:02 +08:00
|
|
|
* 4.3.1 (November 7, 2016)
|
|
|
|
|
|
|
|
|
|
Bug fixes:
|
|
|
|
|
- Fix a severe virtual memory leak. This regression was first released in
|
|
|
|
|
4.3.0. (@interwq, @jasone)
|
|
|
|
|
- Refactor atomic and prng APIs to restore support for 32-bit platforms that
|
|
|
|
|
use pre-C11 toolchains, e.g. FreeBSD's mips. (@jasone)
|
|
|
|
|
|
2016-11-04 15:02:43 +08:00
|
|
|
* 4.3.0 (November 4, 2016)
|
2016-11-03 10:45:01 +08:00
|
|
|
|
|
|
|
|
This is the first release that passes the test suite for multiple Windows
|
|
|
|
|
configurations, thanks in large part to @glandium setting up continuous
|
|
|
|
|
integration via AppVeyor (and Travis CI for Linux and OS X).
|
|
|
|
|
|
|
|
|
|
New features:
|
|
|
|
|
- Add "J" (JSON) support to malloc_stats_print(). (@jasone)
|
|
|
|
|
- Add Cray compiler support. (@ronawho)
|
|
|
|
|
|
|
|
|
|
Optimizations:
|
|
|
|
|
- Add/use adaptive spinning for bootstrapping and radix tree node
|
|
|
|
|
initialization. (@jasone)
|
|
|
|
|
|
|
|
|
|
Bug fixes:
|
2016-11-04 15:02:43 +08:00
|
|
|
- Fix large allocation to search starting in the optimal size class heap,
|
|
|
|
|
which can substantially reduce virtual memory churn and fragmentation. This
|
|
|
|
|
regression was first released in 4.0.0. (@mjp41, @jasone)
|
2016-11-03 10:45:01 +08:00
|
|
|
- Fix stats.arenas.<i>.nthreads accounting. (@interwq)
|
|
|
|
|
- Fix and simplify decay-based purging. (@jasone)
|
|
|
|
|
- Make DSS (sbrk(2)-related) operations lockless, which resolves potential
|
|
|
|
|
deadlocks during thread exit. (@jasone)
|
|
|
|
|
- Fix over-sized allocation of radix tree leaf nodes. (@mjp41, @ogaun,
|
|
|
|
|
@jasone)
|
2016-11-05 06:15:24 +08:00
|
|
|
- Fix over-sized allocation of arena_t (plus associated stats) data
|
|
|
|
|
structures. (@jasone, @interwq)
|
2016-11-03 10:45:01 +08:00
|
|
|
- Fix EXTRA_CFLAGS to not affect configuration. (@jasone)
|
|
|
|
|
- Fix a Valgrind integration bug. (@ronawho)
|
|
|
|
|
- Disallow 0x5a junk filling when running in Valgrind. (@jasone)
|
|
|
|
|
- Fix a file descriptor leak on Linux. This regression was first released in
|
2016-11-04 15:02:43 +08:00
|
|
|
4.2.0. (@vsarunas, @jasone)
|
2016-11-03 10:45:01 +08:00
|
|
|
- Fix static linking of jemalloc with glibc. (@djwatson)
|
|
|
|
|
- Use syscall(2) rather than {open,read,close}(2) during boot on Linux. This
|
|
|
|
|
works around other libraries' system call wrappers performing reentrant
|
2016-11-04 15:02:43 +08:00
|
|
|
allocation. (@kspinka, @Whissi, @jasone)
|
2016-11-03 10:45:01 +08:00
|
|
|
- Fix OS X default zone replacement to work with OS X 10.12. (@glandium,
|
|
|
|
|
@jasone)
|
2016-11-04 15:02:43 +08:00
|
|
|
- Fix cached memory management to avoid needless commit/decommit operations
|
|
|
|
|
during purging, which resolves permanent virtual memory map fragmentation
|
|
|
|
|
issues on Windows. (@mjp41, @jasone)
|
2016-11-03 10:45:01 +08:00
|
|
|
- Fix TSD fetches to avoid (recursive) allocation. This is relevant to
|
|
|
|
|
non-TLS and Windows configurations. (@jasone)
|
|
|
|
|
- Fix malloc_conf overriding to work on Windows. (@jasone)
|
|
|
|
|
- Forcibly disable lazy-lock on Windows (was forcibly *enabled*). (@jasone)
|
|
|
|
|
|
2016-06-08 05:40:43 +08:00
|
|
|
* 4.2.1 (June 8, 2016)
|
|
|
|
|
|
|
|
|
|
Bug fixes:
|
|
|
|
|
- Fix bootstrapping issues for configurations that require allocation during
|
|
|
|
|
tsd initialization (e.g. --disable-tls). (@cferris1000, @jasone)
|
|
|
|
|
- Fix gettimeofday() version of nstime_update(). (@ronawho)
|
|
|
|
|
- Fix Valgrind regressions in calloc() and chunk_alloc_wrapper(). (@ronawho)
|
|
|
|
|
- Fix potential VM map fragmentation regression. (@jasone)
|
|
|
|
|
- Fix opt_zero-triggered in-place huge reallocation zeroing. (@jasone)
|
|
|
|
|
- Fix heap profiling context leaks in reallocation edge cases. (@jasone)
|
|
|
|
|
|
2016-05-13 05:23:50 +08:00
|
|
|
* 4.2.0 (May 12, 2016)
|
2016-05-07 06:22:32 +08:00
|
|
|
|
|
|
|
|
New features:
|
|
|
|
|
- Add the arena.<i>.reset mallctl, which makes it possible to discard all of
|
2016-05-13 06:06:50 +08:00
|
|
|
an arena's allocations in a single operation. (@jasone)
|
2016-05-07 06:22:32 +08:00
|
|
|
- Add the stats.retained and stats.arenas.<i>.retained statistics. (@jasone)
|
|
|
|
|
- Add the --with-version configure option. (@jasone)
|
|
|
|
|
- Support --with-lg-page values larger than actual page size. (@jasone)
|
|
|
|
|
|
|
|
|
|
Optimizations:
|
|
|
|
|
- Use pairing heaps rather than red-black trees for various hot data
|
|
|
|
|
structures. (@djwatson, @jasone)
|
|
|
|
|
- Streamline fast paths of rtree operations. (@jasone)
|
|
|
|
|
- Optimize the fast paths of calloc() and [m,d,sd]allocx(). (@jasone)
|
|
|
|
|
- Decommit unused virtual memory if the OS does not overcommit. (@jasone)
|
|
|
|
|
- Specify MAP_NORESERVE on Linux if [heuristic] overcommit is active, in order
|
|
|
|
|
to avoid unfortunate interactions during fork(2). (@jasone)
|
|
|
|
|
|
|
|
|
|
Bug fixes:
|
2016-05-11 15:52:59 +08:00
|
|
|
- Fix chunk accounting related to triggering gdump profiles. (@jasone)
|
2016-05-07 06:22:32 +08:00
|
|
|
- Link against librt for clock_gettime(2) if glibc < 2.17. (@jasone)
|
|
|
|
|
- Scale leak report summary according to sampling probability. (@jasone)
|
|
|
|
|
|
2016-05-04 03:11:36 +08:00
|
|
|
* 4.1.1 (May 3, 2016)
|
|
|
|
|
|
|
|
|
|
This bugfix release resolves a variety of mostly minor issues, though the
|
|
|
|
|
bitmap fix is critical for 64-bit Windows.
|
|
|
|
|
|
|
|
|
|
Bug fixes:
|
|
|
|
|
- Fix the linear scan version of bitmap_sfu() to shift by the proper amount
|
|
|
|
|
even when sizeof(long) is not the same as sizeof(void *), as on 64-bit
|
|
|
|
|
Windows. (@jasone)
|
|
|
|
|
- Fix hashing functions to avoid unaligned memory accesses (and resulting
|
|
|
|
|
crashes). This is relevant at least to some ARM-based platforms.
|
|
|
|
|
(@rkmisra)
|
|
|
|
|
- Fix fork()-related lock rank ordering reversals. These reversals were
|
|
|
|
|
unlikely to cause deadlocks in practice except when heap profiling was
|
|
|
|
|
enabled and active. (@jasone)
|
|
|
|
|
- Fix various chunk leaks in OOM code paths. (@jasone)
|
|
|
|
|
- Fix malloc_stats_print() to print opt.narenas correctly. (@jasone)
|
2016-05-04 08:46:07 +08:00
|
|
|
- Fix MSVC-specific build/test issues. (@rustyx, @yuslepukhin)
|
2016-05-04 03:11:36 +08:00
|
|
|
- Fix a variety of test failures that were due to test fragility rather than
|
|
|
|
|
core bugs. (@jasone)
|
|
|
|
|
|
2016-02-29 06:52:17 +08:00
|
|
|
* 4.1.0 (February 28, 2016)
|
2016-02-27 13:00:02 +08:00
|
|
|
|
|
|
|
|
This release is primarily about optimizations, but it also incorporates a lot
|
|
|
|
|
of portability-motivated refactoring and enhancements. Many people worked on
|
|
|
|
|
this release, to an extent that even with the omission here of minor changes
|
|
|
|
|
(see git revision history), and of the people who reported and diagnosed
|
|
|
|
|
issues, so much of the work was contributed that starting with this release,
|
|
|
|
|
changes are annotated with author credits to help reflect the collaborative
|
|
|
|
|
effort involved.
|
|
|
|
|
|
|
|
|
|
New features:
|
|
|
|
|
- Implement decay-based unused dirty page purging, a major optimization with
|
|
|
|
|
mallctl API impact. This is an alternative to the existing ratio-based
|
|
|
|
|
unused dirty page purging, and is intended to eventually become the sole
|
|
|
|
|
purging mechanism. New mallctls:
|
|
|
|
|
+ opt.purge
|
|
|
|
|
+ opt.decay_time
|
|
|
|
|
+ arena.<i>.decay
|
|
|
|
|
+ arena.<i>.decay_time
|
|
|
|
|
+ arenas.decay_time
|
|
|
|
|
+ stats.arenas.<i>.decay_time
|
|
|
|
|
(@jasone, @cevans87)
|
|
|
|
|
- Add --with-malloc-conf, which makes it possible to embed a default
|
|
|
|
|
options string during configuration. This was motivated by the desire to
|
|
|
|
|
specify --with-malloc-conf=purge:decay , since the default must remain
|
|
|
|
|
purge:ratio until the 5.0.0 release. (@jasone)
|
2016-02-28 16:01:13 +08:00
|
|
|
- Add MS Visual Studio 2015 support. (@rustyx, @yuslepukhin)
|
2016-02-27 13:00:02 +08:00
|
|
|
- Make *allocx() size class overflow behavior defined. The maximum
|
|
|
|
|
size class is now less than PTRDIFF_MAX to protect applications against
|
|
|
|
|
numerical overflow, and all allocation functions are guaranteed to indicate
|
|
|
|
|
errors rather than potentially crashing if the request size exceeds the
|
|
|
|
|
maximum size class. (@jasone)
|
|
|
|
|
- jeprof:
|
|
|
|
|
+ Add raw heap profile support. (@jasone)
|
|
|
|
|
+ Add --retain and --exclude for backtrace symbol filtering. (@jasone)
|
|
|
|
|
|
|
|
|
|
Optimizations:
|
|
|
|
|
- Optimize the fast path to combine various bootstrapping and configuration
|
|
|
|
|
checks and execute more streamlined code in the common case. (@interwq)
|
|
|
|
|
- Use linear scan for small bitmaps (used for small object tracking). In
|
|
|
|
|
addition to speeding up bitmap operations on 64-bit systems, this reduces
|
|
|
|
|
allocator metadata overhead by approximately 0.2%. (@djwatson)
|
|
|
|
|
- Separate arena_avail trees, which substantially speeds up run tree
|
|
|
|
|
operations. (@djwatson)
|
|
|
|
|
- Use memoization (boot-time-computed table) for run quantization. Separate
|
|
|
|
|
arena_avail trees reduced the importance of this optimization. (@jasone)
|
|
|
|
|
- Attempt mmap-based in-place huge reallocation. This can dramatically speed
|
|
|
|
|
up incremental huge reallocation. (@jasone)
|
|
|
|
|
|
|
|
|
|
Incompatible changes:
|
|
|
|
|
- Make opt.narenas unsigned rather than size_t. (@jasone)
|
|
|
|
|
|
|
|
|
|
Bug fixes:
|
2016-02-28 16:01:13 +08:00
|
|
|
- Fix stats.cactive accounting regression. (@rustyx, @jasone)
|
|
|
|
|
- Handle unaligned keys in hash(). This caused problems for some ARM systems.
|
2016-03-08 09:55:55 +08:00
|
|
|
(@jasone, @cferris1000)
|
2016-02-27 13:00:02 +08:00
|
|
|
- Refactor arenas array. In addition to fixing a fork-related deadlock, this
|
|
|
|
|
makes arena lookups faster and simpler. (@jasone)
|
|
|
|
|
- Move retained memory allocation out of the default chunk allocation
|
|
|
|
|
function, to a location that gets executed even if the application installs
|
|
|
|
|
a custom chunk allocation function. This resolves a virtual memory leak.
|
|
|
|
|
(@buchgr)
|
2016-03-08 09:55:55 +08:00
|
|
|
- Fix a potential tsd cleanup leak. (@cferris1000, @jasone)
|
2016-02-28 16:01:13 +08:00
|
|
|
- Fix run quantization. In practice this bug had no impact unless
|
|
|
|
|
applications requested memory with alignment exceeding one page.
|
|
|
|
|
(@jasone, @djwatson)
|
2016-02-27 13:00:02 +08:00
|
|
|
- Fix LinuxThreads-specific bootstrapping deadlock. (Cosmin Paraschiv)
|
|
|
|
|
- jeprof:
|
|
|
|
|
+ Don't discard curl options if timeout is not defined. (@djwatson)
|
|
|
|
|
+ Detect failed profile fetches. (@djwatson)
|
2016-02-28 16:01:13 +08:00
|
|
|
- Fix stats.arenas.<i>.{dss,lg_dirty_mult,decay_time,pactive,pdirty} for
|
|
|
|
|
--disable-stats case. (@jasone)
|
2016-02-27 13:00:02 +08:00
|
|
|
|
2015-10-24 22:53:25 +08:00
|
|
|
* 4.0.4 (October 24, 2015)
|
|
|
|
|
|
|
|
|
|
This bugfix release fixes another xallocx() regression. No other regressions
|
|
|
|
|
have come to light in over a month, so this is likely a good starting point
|
|
|
|
|
for people who prefer to wait for "dot one" releases with all the major issues
|
|
|
|
|
shaken out.
|
2015-09-25 13:21:55 +08:00
|
|
|
|
|
|
|
|
Bug fixes:
|
|
|
|
|
- Fix xallocx(..., MALLOCX_ZERO to zero the last full trailing page of large
|
|
|
|
|
allocations that have been randomly assigned an offset of 0 when
|
|
|
|
|
--enable-cache-oblivious configure option is enabled.
|
|
|
|
|
|
2015-09-25 11:05:26 +08:00
|
|
|
* 4.0.3 (September 24, 2015)
|
|
|
|
|
|
|
|
|
|
This bugfix release continues the trend of xallocx() and heap profiling fixes.
|
2015-09-22 09:37:18 +08:00
|
|
|
|
|
|
|
|
Bug fixes:
|
2015-09-25 07:38:45 +08:00
|
|
|
- Fix xallocx(..., MALLOCX_ZERO) to zero all trailing bytes of large
|
|
|
|
|
allocations when --enable-cache-oblivious configure option is enabled.
|
|
|
|
|
- Fix xallocx(..., MALLOCX_ZERO) to zero trailing bytes of huge allocations
|
|
|
|
|
when resizing from/to a size class that is not a multiple of the chunk size.
|
2015-09-22 09:37:18 +08:00
|
|
|
- Fix prof_tctx_dump_iter() to filter out nodes that were created after heap
|
|
|
|
|
profile dumping started.
|
2015-09-25 07:53:18 +08:00
|
|
|
- Work around a potentially bad thread-specific data initialization
|
|
|
|
|
interaction with NPTL (glibc's pthreads implementation).
|
2015-09-22 09:37:18 +08:00
|
|
|
|
2015-09-22 01:19:37 +08:00
|
|
|
* 4.0.2 (September 21, 2015)
|
|
|
|
|
|
|
|
|
|
This bugfix release addresses a few bugs specific to heap profiling.
|
2015-09-18 01:05:56 +08:00
|
|
|
|
|
|
|
|
Bug fixes:
|
|
|
|
|
- Fix ixallocx_prof_sample() to never modify nor create sampled small
|
|
|
|
|
allocations. xallocx() is in general incapable of moving small allocations,
|
|
|
|
|
so this fix removes buggy code without loss of generality.
|
2015-09-18 01:17:55 +08:00
|
|
|
- Fix irallocx_prof_sample() to always allocate large regions, even when
|
|
|
|
|
alignment is non-zero.
|
2015-09-18 05:47:39 +08:00
|
|
|
- Fix prof_alloc_rollback() to read tdata from thread-specific data rather
|
|
|
|
|
than dereferencing a potentially invalid tctx.
|
2015-09-18 01:05:56 +08:00
|
|
|
|
2015-09-16 06:26:23 +08:00
|
|
|
* 4.0.1 (September 15, 2015)
|
|
|
|
|
|
|
|
|
|
This is a bugfix release that is somewhat high risk due to the amount of
|
|
|
|
|
refactoring required to address deep xallocx() problems. As a side effect of
|
|
|
|
|
these fixes, xallocx() now tries harder to partially fulfill requests for
|
|
|
|
|
optional extra space. Note that a couple of minor heap profiling
|
|
|
|
|
optimizations are included, but these are better thought of as performance
|
2018-04-11 06:16:23 +08:00
|
|
|
fixes that were integral to discovering most of the other bugs.
|
2015-09-16 06:26:23 +08:00
|
|
|
|
|
|
|
|
Optimizations:
|
|
|
|
|
- Avoid a chunk metadata read in arena_prof_tctx_set(), since it is in the
|
|
|
|
|
fast path when heap profiling is enabled. Additionally, split a special
|
|
|
|
|
case out into arena_prof_tctx_reset(), which also avoids chunk metadata
|
|
|
|
|
reads.
|
|
|
|
|
- Optimize irallocx_prof() to optimistically update the sampler state. The
|
|
|
|
|
prior implementation appears to have been a holdover from when
|
|
|
|
|
rallocx()/xallocx() functionality was combined as rallocm().
|
2015-08-20 05:12:05 +08:00
|
|
|
|
|
|
|
|
Bug fixes:
|
2015-09-16 06:26:23 +08:00
|
|
|
- Fix TLS configuration such that it is enabled by default for platforms on
|
|
|
|
|
which it works correctly.
|
2015-08-26 07:13:59 +08:00
|
|
|
- Fix arenas_cache_cleanup() and arena_get_hard() to handle
|
|
|
|
|
allocation/deallocation within the application's thread-specific data
|
|
|
|
|
cleanup functions even after arenas_cache is torn down.
|
2015-09-16 06:26:23 +08:00
|
|
|
- Fix xallocx() bugs related to size+extra exceeding HUGE_MAXCLASS.
|
2015-08-28 11:30:15 +08:00
|
|
|
- Fix chunk purge hook calls for in-place huge shrinking reallocation to
|
|
|
|
|
specify the old chunk size rather than the new chunk size. This bug caused
|
|
|
|
|
no correctness issues for the default chunk purge function, but was
|
|
|
|
|
visible to custom functions set via the "arena.<i>.chunk_hooks" mallctl.
|
2015-09-16 06:26:23 +08:00
|
|
|
- Fix heap profiling bugs:
|
|
|
|
|
+ Fix heap profiling to distinguish among otherwise identical sample sites
|
|
|
|
|
with interposed resets (triggered via the "prof.reset" mallctl). This bug
|
|
|
|
|
could cause data structure corruption that would most likely result in a
|
|
|
|
|
segfault.
|
|
|
|
|
+ Fix irealloc_prof() to prof_alloc_rollback() on OOM.
|
|
|
|
|
+ Make one call to prof_active_get_unlocked() per allocation event, and use
|
|
|
|
|
the result throughout the relevant functions that handle an allocation
|
|
|
|
|
event. Also add a missing check in prof_realloc(). These fixes protect
|
|
|
|
|
allocation events against concurrent prof_active changes.
|
|
|
|
|
+ Fix ixallocx_prof() to pass usize_max and zero to ixallocx_prof_sample()
|
|
|
|
|
in the correct order.
|
|
|
|
|
+ Fix prof_realloc() to call prof_free_sampled_object() after calling
|
|
|
|
|
prof_malloc_sample_object(). Prior to this fix, if tctx and old_tctx were
|
|
|
|
|
the same, the tctx could have been prematurely destroyed.
|
|
|
|
|
- Fix portability bugs:
|
|
|
|
|
+ Don't bitshift by negative amounts when encoding/decoding run sizes in
|
|
|
|
|
chunk header maps. This affected systems with page sizes greater than 8
|
|
|
|
|
KiB.
|
|
|
|
|
+ Rename index_t to szind_t to avoid an existing type on Solaris.
|
|
|
|
|
+ Add JEMALLOC_CXX_THROW to the memalign() function prototype, in order to
|
|
|
|
|
match glibc and avoid compilation errors when including both
|
|
|
|
|
jemalloc/jemalloc.h and malloc.h in C++ code.
|
|
|
|
|
+ Don't assume that /bin/sh is appropriate when running size_classes.sh
|
|
|
|
|
during configuration.
|
|
|
|
|
+ Consider __sparcv9 a synonym for __sparc64__ when defining LG_QUANTUM.
|
|
|
|
|
+ Link tests to librt if it contains clock_gettime(2).
|
2015-08-20 05:12:05 +08:00
|
|
|
|
2015-08-18 04:21:08 +08:00
|
|
|
* 4.0.0 (August 17, 2015)
|
2015-02-24 14:28:43 +08:00
|
|
|
|
|
|
|
|
This version contains many speed and space optimizations, both minor and
|
|
|
|
|
major. The major themes are generalization, unification, and simplification.
|
|
|
|
|
Although many of these optimizations cause no visible behavior change, their
|
|
|
|
|
cumulative effect is substantial.
|
|
|
|
|
|
|
|
|
|
New features:
|
|
|
|
|
- Normalize size class spacing to be consistent across the complete size
|
|
|
|
|
range. By default there are four size classes per size doubling, but this
|
|
|
|
|
is now configurable via the --with-lg-size-class-group option. Also add the
|
|
|
|
|
--with-lg-page, --with-lg-page-sizes, --with-lg-quantum, and
|
|
|
|
|
--with-lg-tiny-min options, which can be used to tweak page and size class
|
|
|
|
|
settings. Impacts:
|
|
|
|
|
+ Worst case performance for incrementally growing/shrinking reallocation
|
|
|
|
|
is improved because there are far fewer size classes, and therefore
|
|
|
|
|
copying happens less often.
|
|
|
|
|
+ Internal fragmentation is limited to 20% for all but the smallest size
|
|
|
|
|
classes (those less than four times the quantum). (1B + 4 KiB)
|
|
|
|
|
and (1B + 4 MiB) previously suffered nearly 50% internal fragmentation.
|
|
|
|
|
+ Chunk fragmentation tends to be lower because there are fewer distinct run
|
|
|
|
|
sizes to pack.
|
|
|
|
|
- Add support for explicit tcaches. The "tcache.create", "tcache.flush", and
|
|
|
|
|
"tcache.destroy" mallctls control tcache lifetime and flushing, and the
|
|
|
|
|
MALLOCX_TCACHE(tc) and MALLOCX_TCACHE_NONE flags to the *allocx() API
|
|
|
|
|
control which tcache is used for each operation.
|
|
|
|
|
- Implement per thread heap profiling, as well as the ability to
|
|
|
|
|
enable/disable heap profiling on a per thread basis. Add the "prof.reset",
|
|
|
|
|
"prof.lg_sample", "thread.prof.name", "thread.prof.active",
|
|
|
|
|
"opt.prof_thread_active_init", "prof.thread_active_init", and
|
|
|
|
|
"thread.prof.active" mallctls.
|
|
|
|
|
- Add support for per arena application-specified chunk allocators, configured
|
Generalize chunk management hooks.
Add the "arena.<i>.chunk_hooks" mallctl, which replaces and expands on
the "arena.<i>.chunk.{alloc,dalloc,purge}" mallctls. The chunk hooks
allow control over chunk allocation/deallocation, decommit/commit,
purging, and splitting/merging, such that the application can rely on
jemalloc's internal chunk caching and retaining functionality, yet
implement a variety of chunk management mechanisms and policies.
Merge the chunks_[sz]ad_{mmap,dss} red-black trees into
chunks_[sz]ad_retained. This slightly reduces how hard jemalloc tries
to honor the dss precedence setting; prior to this change the precedence
setting was also consulted when recycling chunks.
Fix chunk purging. Don't purge chunks in arena_purge_stashed(); instead
deallocate them in arena_unstash_purged(), so that the dirty memory
linkage remains valid until after the last time it is used.
This resolves #176 and #201.
2015-07-28 23:28:19 +08:00
|
|
|
via the "arena.<i>.chunk_hooks" mallctl.
|
2015-02-24 14:28:43 +08:00
|
|
|
- Refactor huge allocation to be managed by arenas, so that arenas now
|
|
|
|
|
function as general purpose independent allocators. This is important in
|
|
|
|
|
the context of user-specified chunk allocators, aside from the scalability
|
|
|
|
|
benefits. Related new statistics:
|
|
|
|
|
+ The "stats.arenas.<i>.huge.allocated", "stats.arenas.<i>.huge.nmalloc",
|
|
|
|
|
"stats.arenas.<i>.huge.ndalloc", and "stats.arenas.<i>.huge.nrequests"
|
|
|
|
|
mallctls provide high level per arena huge allocation statistics.
|
2015-04-22 07:57:42 +08:00
|
|
|
+ The "arenas.nhchunks", "arenas.hchunk.<i>.size",
|
2015-02-24 14:28:43 +08:00
|
|
|
"stats.arenas.<i>.hchunks.<j>.nmalloc",
|
|
|
|
|
"stats.arenas.<i>.hchunks.<j>.ndalloc",
|
|
|
|
|
"stats.arenas.<i>.hchunks.<j>.nrequests", and
|
|
|
|
|
"stats.arenas.<i>.hchunks.<j>.curhchunks" mallctls provide per size class
|
|
|
|
|
statistics.
|
|
|
|
|
- Add the 'util' column to malloc_stats_print() output, which reports the
|
|
|
|
|
proportion of available regions that are currently in use for each small
|
|
|
|
|
size class.
|
|
|
|
|
- Add "alloc" and "free" modes for for junk filling (see the "opt.junk"
|
|
|
|
|
mallctl), so that it is possible to separately enable junk filling for
|
|
|
|
|
allocation versus deallocation.
|
|
|
|
|
- Add the jemalloc-config script, which provides information about how
|
|
|
|
|
jemalloc was configured, and how to integrate it into application builds.
|
|
|
|
|
- Add metadata statistics, which are accessible via the "stats.metadata",
|
|
|
|
|
"stats.arenas.<i>.metadata.mapped", and
|
|
|
|
|
"stats.arenas.<i>.metadata.allocated" mallctls.
|
2015-03-24 08:25:57 +08:00
|
|
|
- Add the "stats.resident" mallctl, which reports the upper limit of
|
|
|
|
|
physically resident memory mapped by the allocator.
|
2015-03-25 07:36:12 +08:00
|
|
|
- Add per arena control over unused dirty page purging, via the
|
|
|
|
|
"arenas.lg_dirty_mult", "arena.<i>.lg_dirty_mult", and
|
|
|
|
|
"stats.arenas.<i>.lg_dirty_mult" mallctls.
|
2015-02-24 14:28:43 +08:00
|
|
|
- Add the "prof.gdump" mallctl, which makes it possible to toggle the gdump
|
|
|
|
|
feature on/off during program execution.
|
|
|
|
|
- Add sdallocx(), which implements sized deallocation. The primary
|
|
|
|
|
optimization over dallocx() is the removal of a metadata read, which often
|
|
|
|
|
suffers an L1 cache miss.
|
|
|
|
|
- Add missing header includes in jemalloc/jemalloc.h, so that applications
|
|
|
|
|
only have to #include <jemalloc/jemalloc.h>.
|
|
|
|
|
- Add support for additional platforms:
|
|
|
|
|
+ Bitrig
|
|
|
|
|
+ Cygwin
|
|
|
|
|
+ DragonFlyBSD
|
|
|
|
|
+ iOS
|
|
|
|
|
+ OpenBSD
|
|
|
|
|
+ OpenRISC/or1k
|
|
|
|
|
|
|
|
|
|
Optimizations:
|
|
|
|
|
- Maintain dirty runs in per arena LRUs rather than in per arena trees of
|
|
|
|
|
dirty-run-containing chunks. In practice this change significantly reduces
|
|
|
|
|
dirty page purging volume.
|
|
|
|
|
- Integrate whole chunks into the unused dirty page purging machinery. This
|
|
|
|
|
reduces the cost of repeated huge allocation/deallocation, because it
|
|
|
|
|
effectively introduces a cache of chunks.
|
|
|
|
|
- Split the arena chunk map into two separate arrays, in order to increase
|
|
|
|
|
cache locality for the frequently accessed bits.
|
|
|
|
|
- Move small run metadata out of runs, into arena chunk headers. This reduces
|
|
|
|
|
run fragmentation, smaller runs reduce external fragmentation for small size
|
|
|
|
|
classes, and packed (less uniformly aligned) metadata layout improves CPU
|
|
|
|
|
cache set distribution.
|
2015-05-05 00:58:36 +08:00
|
|
|
- Randomly distribute large allocation base pointer alignment relative to page
|
|
|
|
|
boundaries in order to more uniformly utilize CPU cache sets. This can be
|
2015-07-18 07:38:25 +08:00
|
|
|
disabled via the --disable-cache-oblivious configure option, and queried via
|
|
|
|
|
the "config.cache_oblivious" mallctl.
|
2015-02-24 14:28:43 +08:00
|
|
|
- Micro-optimize the fast paths for the public API functions.
|
|
|
|
|
- Refactor thread-specific data to reside in a single structure. This assures
|
|
|
|
|
that only a single TLS read is necessary per call into the public API.
|
|
|
|
|
- Implement in-place huge allocation growing and shrinking.
|
|
|
|
|
- Refactor rtree (radix tree for chunk lookups) to be lock-free, and make
|
|
|
|
|
additional optimizations that reduce maximum lookup depth to one or two
|
|
|
|
|
levels. This resolves what was a concurrency bottleneck for per arena huge
|
|
|
|
|
allocation, because a global data structure is critical for determining
|
|
|
|
|
which arenas own which huge allocations.
|
|
|
|
|
|
|
|
|
|
Incompatible changes:
|
|
|
|
|
- Replace --enable-cc-silence with --disable-cc-silence to suppress spurious
|
|
|
|
|
warnings by default.
|
|
|
|
|
- Assure that the constness of malloc_usable_size()'s return type matches that
|
|
|
|
|
of the system implementation.
|
|
|
|
|
- Change the heap profile dump format to support per thread heap profiling,
|
2015-05-02 03:31:12 +08:00
|
|
|
rename pprof to jeprof, and enhance it with the --thread=<n> option. As a
|
|
|
|
|
result, the bundled jeprof must now be used rather than the upstream
|
|
|
|
|
(gperftools) pprof.
|
2015-02-24 14:28:43 +08:00
|
|
|
- Disable "opt.prof_final" by default, in order to avoid atexit(3), which can
|
|
|
|
|
internally deadlock on some platforms.
|
|
|
|
|
- Change the "arenas.nlruns" mallctl type from size_t to unsigned.
|
|
|
|
|
- Replace the "stats.arenas.<i>.bins.<j>.allocated" mallctl with
|
|
|
|
|
"stats.arenas.<i>.bins.<j>.curregs".
|
|
|
|
|
- Ignore MALLOC_CONF in set{uid,gid,cap} binaries.
|
|
|
|
|
- Ignore MALLOCX_ARENA(a) in dallocx(), in favor of using the
|
|
|
|
|
MALLOCX_TCACHE(tc) and MALLOCX_TCACHE_NONE flags to control tcache usage.
|
|
|
|
|
|
|
|
|
|
Removed features:
|
|
|
|
|
- Remove the *allocm() API, which is superseded by the *allocx() API.
|
|
|
|
|
- Remove the --enable-dss options, and make dss non-optional on all platforms
|
|
|
|
|
which support sbrk(2).
|
|
|
|
|
- Remove the "arenas.purge" mallctl, which was obsoleted by the
|
|
|
|
|
"arena.<i>.purge" mallctl in 3.1.0.
|
|
|
|
|
- Remove the unnecessary "opt.valgrind" mallctl; jemalloc automatically
|
|
|
|
|
detects whether it is running inside Valgrind.
|
|
|
|
|
- Remove the "stats.huge.allocated", "stats.huge.nmalloc", and
|
|
|
|
|
"stats.huge.ndalloc" mallctls.
|
|
|
|
|
- Remove the --enable-mremap option.
|
|
|
|
|
- Remove the "stats.chunks.current", "stats.chunks.total", and
|
|
|
|
|
"stats.chunks.high" mallctls.
|
|
|
|
|
|
|
|
|
|
Bug fixes:
|
|
|
|
|
- Fix the cactive statistic to decrease (rather than increase) when active
|
|
|
|
|
memory decreases. This regression was first released in 3.5.0.
|
|
|
|
|
- Fix OOM handling in memalign() and valloc(). A variant of this bug existed
|
|
|
|
|
in all releases since 2.0.0, which introduced these functions.
|
2015-07-10 02:34:13 +08:00
|
|
|
- Fix an OOM-related regression in arena_tcache_fill_small(), which could
|
|
|
|
|
cause cache corruption on OOM. This regression was present in all releases
|
|
|
|
|
from 2.2.0 through 3.6.0.
|
2015-06-24 09:47:07 +08:00
|
|
|
- Fix size class overflow handling for malloc(), posix_memalign(), memalign(),
|
|
|
|
|
calloc(), and realloc() when profiling is enabled.
|
2015-02-24 14:28:43 +08:00
|
|
|
- Fix the "arena.<i>.dss" mallctl to return an error if "primary" or
|
|
|
|
|
"secondary" precedence is specified, but sbrk(2) is not supported.
|
|
|
|
|
- Fix fallback lg_floor() implementations to handle extremely large inputs.
|
|
|
|
|
- Ensure the default purgeable zone is after the default zone on OS X.
|
|
|
|
|
- Fix latent bugs in atomic_*().
|
|
|
|
|
- Fix the "arena.<i>.dss" mallctl to handle read-only calls.
|
|
|
|
|
- Fix tls_model configuration to enable the initial-exec model when possible.
|
|
|
|
|
- Mark malloc_conf as a weak symbol so that the application can override it.
|
|
|
|
|
- Correctly detect glibc's adaptive pthread mutexes.
|
|
|
|
|
- Fix the --without-export configure option.
|
|
|
|
|
|
2014-04-01 00:23:10 +08:00
|
|
|
* 3.6.0 (March 31, 2014)
|
|
|
|
|
|
|
|
|
|
This version contains a critical bug fix for a regression present in 3.5.0 and
|
|
|
|
|
3.5.1.
|
|
|
|
|
|
|
|
|
|
Bug fixes:
|
|
|
|
|
- Fix a regression in arena_chunk_alloc() that caused crashes during
|
|
|
|
|
small/large allocation if chunk allocation failed. In the absence of this
|
|
|
|
|
bug, chunk allocation failure would result in allocation failure, e.g. NULL
|
|
|
|
|
return from malloc(). This regression was introduced in 3.5.0.
|
|
|
|
|
- Fix backtracing for gcc intrinsics-based backtracing by specifying
|
|
|
|
|
-fno-omit-frame-pointer to gcc. Note that the application (and all the
|
|
|
|
|
libraries it links to) must also be compiled with this option for
|
|
|
|
|
backtracing to be reliable.
|
|
|
|
|
- Use dss allocation precedence for huge allocations as well as small/large
|
|
|
|
|
allocations.
|
2015-02-24 14:28:43 +08:00
|
|
|
- Fix test assertion failure message formatting. This bug did not manifest on
|
2014-04-01 00:23:10 +08:00
|
|
|
x86_64 systems because of implementation subtleties in va_list.
|
|
|
|
|
- Fix inconsequential test failures for hash and SFMT code.
|
|
|
|
|
|
|
|
|
|
New features:
|
|
|
|
|
- Support heap profiling on FreeBSD. This feature depends on the proc
|
|
|
|
|
filesystem being mounted during heap profile dumping.
|
|
|
|
|
|
2014-02-26 08:43:51 +08:00
|
|
|
* 3.5.1 (February 25, 2014)
|
|
|
|
|
|
|
|
|
|
This version primarily addresses minor bugs in test code.
|
|
|
|
|
|
|
|
|
|
Bug fixes:
|
|
|
|
|
- Configure Solaris/Illumos to use MADV_FREE.
|
|
|
|
|
- Fix junk filling for mremap(2)-based huge reallocation. This is only
|
|
|
|
|
relevant if configuring with the --enable-mremap option specified.
|
|
|
|
|
- Avoid compilation failure if 'restrict' C99 keyword is not supported by the
|
|
|
|
|
compiler.
|
|
|
|
|
- Add a configure test for SSE2 rather than assuming it is usable on i686
|
|
|
|
|
systems. This fixes test compilation errors, especially on 32-bit Linux
|
|
|
|
|
systems.
|
|
|
|
|
- Fix mallctl argument size mismatches (size_t vs. uint64_t) in the stats unit
|
|
|
|
|
test.
|
|
|
|
|
- Fix/remove flawed alignment-related overflow tests.
|
|
|
|
|
- Prevent compiler optimizations that could change backtraces in the
|
|
|
|
|
prof_accum unit test.
|
2010-10-25 07:18:29 +08:00
|
|
|
|
2014-01-23 03:09:50 +08:00
|
|
|
* 3.5.0 (January 22, 2014)
|
Refactor to support more varied testing.
Refactor the test harness to support three types of tests:
- unit: White box unit tests. These tests have full access to all
internal jemalloc library symbols. Though in actuality all symbols
are prefixed by jet_, macro-based name mangling abstracts this away
from test code.
- integration: Black box integration tests. These tests link with
the installable shared jemalloc library, and with the exception of
some utility code and configure-generated macro definitions, they have
no access to jemalloc internals.
- stress: Black box stress tests. These tests link with the installable
shared jemalloc library, as well as with an internal allocator with
symbols prefixed by jet_ (same as for unit tests) that can be used to
allocate data structures that are internal to the test code.
Move existing tests into test/{unit,integration}/ as appropriate.
Split out internal parts of jemalloc_defs.h.in and put them in
jemalloc_internal_defs.h.in. This reduces internals exposure to
applications that #include <jemalloc/jemalloc.h>.
Refactor jemalloc.h header generation so that a single header file
results, and the prototypes can be used to generate jet_ prototypes for
tests. Split jemalloc.h.in into multiple parts (jemalloc_defs.h.in,
jemalloc_macros.h.in, jemalloc_protos.h.in, jemalloc_mangle.h.in) and
use a shell script to generate a unified jemalloc.h at configure time.
Change the default private namespace prefix from "" to "je_".
Add missing private namespace mangling.
Remove hard-coded private_namespace.h. Instead generate it and
private_unnamespace.h from private_symbols.txt. Use similar logic for
public symbols, which aids in name mangling for jet_ symbols.
Add test_warn() and test_fail(). Replace existing exit(1) calls with
test_fail() calls.
2013-12-01 07:25:42 +08:00
|
|
|
|
2014-01-18 09:01:23 +08:00
|
|
|
This version focuses on refactoring and automated testing, though it also
|
|
|
|
|
includes some non-trivial heap profiling optimizations not mentioned below.
|
|
|
|
|
|
|
|
|
|
New features:
|
|
|
|
|
- Add the *allocx() API, which is a successor to the experimental *allocm()
|
|
|
|
|
API. The *allocx() functions are slightly simpler to use because they have
|
|
|
|
|
fewer parameters, they directly return the results of primary interest, and
|
|
|
|
|
mallocx()/rallocx() avoid the strict aliasing pitfall that
|
2014-01-23 05:08:47 +08:00
|
|
|
allocm()/rallocm() share with posix_memalign(). Note that *allocm() is
|
2014-01-18 09:01:23 +08:00
|
|
|
slated for removal in the next non-bugfix release.
|
|
|
|
|
- Add support for LinuxThreads.
|
|
|
|
|
|
Refactor to support more varied testing.
Refactor the test harness to support three types of tests:
- unit: White box unit tests. These tests have full access to all
internal jemalloc library symbols. Though in actuality all symbols
are prefixed by jet_, macro-based name mangling abstracts this away
from test code.
- integration: Black box integration tests. These tests link with
the installable shared jemalloc library, and with the exception of
some utility code and configure-generated macro definitions, they have
no access to jemalloc internals.
- stress: Black box stress tests. These tests link with the installable
shared jemalloc library, as well as with an internal allocator with
symbols prefixed by jet_ (same as for unit tests) that can be used to
allocate data structures that are internal to the test code.
Move existing tests into test/{unit,integration}/ as appropriate.
Split out internal parts of jemalloc_defs.h.in and put them in
jemalloc_internal_defs.h.in. This reduces internals exposure to
applications that #include <jemalloc/jemalloc.h>.
Refactor jemalloc.h header generation so that a single header file
results, and the prototypes can be used to generate jet_ prototypes for
tests. Split jemalloc.h.in into multiple parts (jemalloc_defs.h.in,
jemalloc_macros.h.in, jemalloc_protos.h.in, jemalloc_mangle.h.in) and
use a shell script to generate a unified jemalloc.h at configure time.
Change the default private namespace prefix from "" to "je_".
Add missing private namespace mangling.
Remove hard-coded private_namespace.h. Instead generate it and
private_unnamespace.h from private_symbols.txt. Use similar logic for
public symbols, which aids in name mangling for jet_ symbols.
Add test_warn() and test_fail(). Replace existing exit(1) calls with
test_fail() calls.
2013-12-01 07:25:42 +08:00
|
|
|
Bug fixes:
|
2013-12-06 15:01:50 +08:00
|
|
|
- Unless heap profiling is enabled, disable floating point code and don't link
|
|
|
|
|
with libm. This, in combination with e.g. EXTRA_CFLAGS=-mno-sse on x64
|
|
|
|
|
systems, makes it possible to completely disable floating point register
|
|
|
|
|
use. Some versions of glibc neglect to save/restore caller-saved floating
|
|
|
|
|
point registers during dynamic lazy symbol loading, and the symbol loading
|
|
|
|
|
code uses whatever malloc the application happens to have linked/loaded
|
|
|
|
|
with, the result being potential floating point register corruption.
|
2014-01-18 09:01:23 +08:00
|
|
|
- Report ENOMEM rather than EINVAL if an OOM occurs during heap profiling
|
|
|
|
|
backtrace creation in imemalign(). This bug impacted posix_memalign() and
|
|
|
|
|
aligned_alloc().
|
|
|
|
|
- Fix a file descriptor leak in a prof_dump_maps() error path.
|
|
|
|
|
- Fix prof_dump() to close the dump file descriptor for all relevant error
|
|
|
|
|
paths.
|
|
|
|
|
- Fix rallocm() to use the arena specified by the ALLOCM_ARENA(s) flag for
|
|
|
|
|
allocation, not just deallocation.
|
|
|
|
|
- Fix a data race for large allocation stats counters.
|
|
|
|
|
- Fix a potential infinite loop during thread exit. This bug occurred on
|
|
|
|
|
Solaris, and could affect other platforms with similar pthreads TSD
|
|
|
|
|
implementations.
|
|
|
|
|
- Don't junk-fill reallocations unless usable size changes. This fixes a
|
|
|
|
|
violation of the *allocx()/*allocm() semantics.
|
|
|
|
|
- Fix growing large reallocation to junk fill new space.
|
|
|
|
|
- Fix huge deallocation to junk fill when munmap is disabled.
|
Refactor to support more varied testing.
Refactor the test harness to support three types of tests:
- unit: White box unit tests. These tests have full access to all
internal jemalloc library symbols. Though in actuality all symbols
are prefixed by jet_, macro-based name mangling abstracts this away
from test code.
- integration: Black box integration tests. These tests link with
the installable shared jemalloc library, and with the exception of
some utility code and configure-generated macro definitions, they have
no access to jemalloc internals.
- stress: Black box stress tests. These tests link with the installable
shared jemalloc library, as well as with an internal allocator with
symbols prefixed by jet_ (same as for unit tests) that can be used to
allocate data structures that are internal to the test code.
Move existing tests into test/{unit,integration}/ as appropriate.
Split out internal parts of jemalloc_defs.h.in and put them in
jemalloc_internal_defs.h.in. This reduces internals exposure to
applications that #include <jemalloc/jemalloc.h>.
Refactor jemalloc.h header generation so that a single header file
results, and the prototypes can be used to generate jet_ prototypes for
tests. Split jemalloc.h.in into multiple parts (jemalloc_defs.h.in,
jemalloc_macros.h.in, jemalloc_protos.h.in, jemalloc_mangle.h.in) and
use a shell script to generate a unified jemalloc.h at configure time.
Change the default private namespace prefix from "" to "je_".
Add missing private namespace mangling.
Remove hard-coded private_namespace.h. Instead generate it and
private_unnamespace.h from private_symbols.txt. Use similar logic for
public symbols, which aids in name mangling for jet_ symbols.
Add test_warn() and test_fail(). Replace existing exit(1) calls with
test_fail() calls.
2013-12-01 07:25:42 +08:00
|
|
|
- Change the default private namespace prefix from empty to je_, and change
|
|
|
|
|
--with-private-namespace-prefix so that it prepends an additional prefix
|
|
|
|
|
rather than replacing je_. This reduces the likelihood of applications
|
|
|
|
|
which statically link jemalloc experiencing symbol name collisions.
|
2014-01-18 09:01:23 +08:00
|
|
|
- Add missing private namespace mangling (relevant when
|
|
|
|
|
--with-private-namespace is specified).
|
|
|
|
|
- Add and use JEMALLOC_INLINE_C so that static inline functions are marked as
|
|
|
|
|
static even for debug builds.
|
|
|
|
|
- Add a missing mutex unlock in a malloc_init_hard() error path. In practice
|
|
|
|
|
this error path is never executed.
|
|
|
|
|
- Fix numerous bugs in malloc_strotumax() error handling/reporting. These
|
|
|
|
|
bugs had no impact except for malformed inputs.
|
|
|
|
|
- Fix numerous bugs in malloc_snprintf(). These bugs were not exercised by
|
|
|
|
|
existing calls, so they had no impact.
|
Refactor to support more varied testing.
Refactor the test harness to support three types of tests:
- unit: White box unit tests. These tests have full access to all
internal jemalloc library symbols. Though in actuality all symbols
are prefixed by jet_, macro-based name mangling abstracts this away
from test code.
- integration: Black box integration tests. These tests link with
the installable shared jemalloc library, and with the exception of
some utility code and configure-generated macro definitions, they have
no access to jemalloc internals.
- stress: Black box stress tests. These tests link with the installable
shared jemalloc library, as well as with an internal allocator with
symbols prefixed by jet_ (same as for unit tests) that can be used to
allocate data structures that are internal to the test code.
Move existing tests into test/{unit,integration}/ as appropriate.
Split out internal parts of jemalloc_defs.h.in and put them in
jemalloc_internal_defs.h.in. This reduces internals exposure to
applications that #include <jemalloc/jemalloc.h>.
Refactor jemalloc.h header generation so that a single header file
results, and the prototypes can be used to generate jet_ prototypes for
tests. Split jemalloc.h.in into multiple parts (jemalloc_defs.h.in,
jemalloc_macros.h.in, jemalloc_protos.h.in, jemalloc_mangle.h.in) and
use a shell script to generate a unified jemalloc.h at configure time.
Change the default private namespace prefix from "" to "je_".
Add missing private namespace mangling.
Remove hard-coded private_namespace.h. Instead generate it and
private_unnamespace.h from private_symbols.txt. Use similar logic for
public symbols, which aids in name mangling for jet_ symbols.
Add test_warn() and test_fail(). Replace existing exit(1) calls with
test_fail() calls.
2013-12-01 07:25:42 +08:00
|
|
|
|
2013-10-21 10:40:09 +08:00
|
|
|
* 3.4.1 (October 20, 2013)
|
2013-10-20 12:41:10 +08:00
|
|
|
|
|
|
|
|
Bug fixes:
|
2013-10-21 05:09:54 +08:00
|
|
|
- Fix a race in the "arenas.extend" mallctl that could cause memory corruption
|
|
|
|
|
of internal data structures and subsequent crashes.
|
2013-10-20 14:48:40 +08:00
|
|
|
- Fix Valgrind integration flaws that caused Valgrind warnings about reads of
|
|
|
|
|
uninitialized memory in:
|
|
|
|
|
+ arena chunk headers
|
|
|
|
|
+ internal zero-initialized data structures (relevant to tcache and prof
|
|
|
|
|
code)
|
2013-10-20 12:41:10 +08:00
|
|
|
- Preserve errno during the first allocation. A readlink(2) call during
|
|
|
|
|
initialization fails unless /etc/malloc.conf exists, so errno was typically
|
|
|
|
|
set during the first allocation prior to this fix.
|
|
|
|
|
- Fix compilation warnings reported by gcc 4.8.1.
|
|
|
|
|
|
2013-06-03 11:58:00 +08:00
|
|
|
* 3.4.0 (June 2, 2013)
|
|
|
|
|
|
|
|
|
|
This version is essentially a small bugfix release, but the addition of
|
|
|
|
|
aarch64 support requires that the minor version be incremented.
|
|
|
|
|
|
|
|
|
|
Bug fixes:
|
|
|
|
|
- Fix race-triggered deadlocks in chunk_record(). These deadlocks were
|
|
|
|
|
typically triggered by multiple threads concurrently deallocating huge
|
|
|
|
|
objects.
|
|
|
|
|
|
|
|
|
|
New features:
|
|
|
|
|
- Add support for the aarch64 architecture.
|
|
|
|
|
|
2013-03-07 03:11:17 +08:00
|
|
|
* 3.3.1 (March 6, 2013)
|
|
|
|
|
|
|
|
|
|
This version fixes bugs that are typically encountered only when utilizing
|
|
|
|
|
custom run-time options.
|
2013-01-31 07:03:11 +08:00
|
|
|
|
|
|
|
|
Bug fixes:
|
2013-02-07 03:59:30 +08:00
|
|
|
- Fix a locking order bug that could cause deadlock during fork if heap
|
|
|
|
|
profiling were enabled.
|
2013-02-01 08:53:58 +08:00
|
|
|
- Fix a chunk recycling bug that could cause the allocator to lose track of
|
2013-06-03 11:58:00 +08:00
|
|
|
whether a chunk was zeroed. On FreeBSD, NetBSD, and OS X, it could cause
|
2013-02-01 08:53:58 +08:00
|
|
|
corruption if allocating via sbrk(2) (unlikely unless running with the
|
|
|
|
|
"dss:primary" option specified). This was completely harmless on Linux
|
|
|
|
|
unless using mlockall(2) (and unlikely even then, unless the
|
|
|
|
|
--disable-munmap configure option or the "dss:primary" option was
|
|
|
|
|
specified). This regression was introduced in 3.1.0 by the
|
|
|
|
|
mlockall(2)/madvise(2) interaction fix.
|
2013-01-31 07:03:11 +08:00
|
|
|
- Fix TLS-related memory corruption that could occur during thread exit if the
|
|
|
|
|
thread never allocated memory. Only the quarantine and prof facilities were
|
|
|
|
|
susceptible.
|
2013-02-01 06:42:41 +08:00
|
|
|
- Fix two quarantine bugs:
|
|
|
|
|
+ Internal reallocation of the quarantined object array leaked the old
|
|
|
|
|
array.
|
|
|
|
|
+ Reallocation failure for internal reallocation of the quarantined object
|
|
|
|
|
array (very unlikely) resulted in memory corruption.
|
2013-02-01 09:02:53 +08:00
|
|
|
- Fix Valgrind integration to annotate all internally allocated memory in a
|
|
|
|
|
way that keeps Valgrind happy about internal data structure access.
|
2013-03-07 03:11:17 +08:00
|
|
|
- Fix building for s390 systems.
|
2013-01-31 07:03:11 +08:00
|
|
|
|
2013-01-23 14:45:09 +08:00
|
|
|
* 3.3.0 (January 23, 2013)
|
|
|
|
|
|
|
|
|
|
This version includes a few minor performance improvements in addition to the
|
|
|
|
|
listed new features and bug fixes.
|
|
|
|
|
|
|
|
|
|
New features:
|
|
|
|
|
- Add clipping support to lg_chunk option processing.
|
|
|
|
|
- Add the --enable-ivsalloc option.
|
|
|
|
|
- Add the --without-export option.
|
|
|
|
|
- Add the --disable-zone-allocator option.
|
2012-11-30 14:13:04 +08:00
|
|
|
|
|
|
|
|
Bug fixes:
|
|
|
|
|
- Fix "arenas.extend" mallctl to output the number of arenas.
|
2013-10-04 05:38:39 +08:00
|
|
|
- Fix chunk_recycle() to unconditionally inform Valgrind that returned memory
|
2012-12-13 02:12:18 +08:00
|
|
|
is undefined.
|
2013-01-23 14:45:09 +08:00
|
|
|
- Fix build break on FreeBSD related to alloca.h.
|
2012-11-30 14:13:04 +08:00
|
|
|
|
2012-11-08 07:16:29 +08:00
|
|
|
* 3.2.0 (November 9, 2012)
|
|
|
|
|
|
|
|
|
|
In addition to a couple of bug fixes, this version modifies page run
|
|
|
|
|
allocation and dirty page purging algorithms in order to better control
|
|
|
|
|
page-level virtual memory fragmentation.
|
2012-10-17 13:06:56 +08:00
|
|
|
|
2012-10-31 06:42:37 +08:00
|
|
|
Incompatible changes:
|
2012-11-08 07:16:29 +08:00
|
|
|
- Change the "opt.lg_dirty_mult" default from 5 to 3 (32:1 to 8:1).
|
2012-10-31 06:42:37 +08:00
|
|
|
|
2012-10-17 13:06:56 +08:00
|
|
|
Bug fixes:
|
|
|
|
|
- Fix dss/mmap allocation precedence code to use recyclable mmap memory only
|
|
|
|
|
after primary dss allocation fails.
|
2012-10-31 06:42:37 +08:00
|
|
|
- Fix deadlock in the "arenas.purge" mallctl. This regression was introduced
|
|
|
|
|
in 3.1.0 by the addition of the "arena.<i>.purge" mallctl.
|
2012-10-17 13:06:56 +08:00
|
|
|
|
2012-10-17 01:12:40 +08:00
|
|
|
* 3.1.0 (October 16, 2012)
|
2012-05-16 04:53:21 +08:00
|
|
|
|
2012-05-16 05:48:14 +08:00
|
|
|
New features:
|
|
|
|
|
- Auto-detect whether running inside Valgrind, thus removing the need to
|
|
|
|
|
manually specify MALLOC_CONF=valgrind:true.
|
2012-10-17 01:12:40 +08:00
|
|
|
- Add the "arenas.extend" mallctl, which allows applications to create
|
|
|
|
|
manually managed arenas.
|
|
|
|
|
- Add the ALLOCM_ARENA() flag for {,r,d}allocm().
|
|
|
|
|
- Add the "opt.dss", "arena.<i>.dss", and "stats.arenas.<i>.dss" mallctls,
|
|
|
|
|
which provide control over dss/mmap precedence.
|
|
|
|
|
- Add the "arena.<i>.purge" mallctl, which obsoletes "arenas.purge".
|
|
|
|
|
- Define LG_QUANTUM for hppa.
|
2012-05-16 05:48:14 +08:00
|
|
|
|
2012-05-16 14:31:53 +08:00
|
|
|
Incompatible changes:
|
|
|
|
|
- Disable tcache by default if running inside Valgrind, in order to avoid
|
|
|
|
|
making unallocated objects appear reachable to Valgrind.
|
2012-10-17 01:12:40 +08:00
|
|
|
- Drop const from malloc_usable_size() argument on Linux.
|
2012-05-16 14:31:53 +08:00
|
|
|
|
2012-05-16 04:53:21 +08:00
|
|
|
Bug fixes:
|
|
|
|
|
- Fix heap profiling crash if sampled object is freed via realloc(p, 0).
|
2012-05-24 07:09:22 +08:00
|
|
|
- Remove const from __*_hook variable declarations, so that glibc can modify
|
|
|
|
|
them during process forking.
|
2012-10-17 01:12:40 +08:00
|
|
|
- Fix mlockall(2)/madvise(2) interaction.
|
|
|
|
|
- Fix fork(2)-related deadlocks.
|
|
|
|
|
- Fix error return value for "thread.tcache.enabled" mallctl.
|
2012-05-16 04:53:21 +08:00
|
|
|
|
2012-05-12 08:00:20 +08:00
|
|
|
* 3.0.0 (May 11, 2012)
|
2012-04-17 09:16:48 +08:00
|
|
|
|
|
|
|
|
Although this version adds some major new features, the primary focus is on
|
|
|
|
|
internal code cleanup that facilitates maintainability and portability, most
|
|
|
|
|
of which is not reflected in the ChangeLog. This is the first release to
|
|
|
|
|
incorporate substantial contributions from numerous other developers, and the
|
|
|
|
|
result is a more broadly useful allocator (see the git revision history for
|
|
|
|
|
contribution details). Note that the license has been unified, thanks to
|
|
|
|
|
Facebook granting a license under the same terms as the other copyright
|
|
|
|
|
holders (see COPYING).
|
|
|
|
|
|
|
|
|
|
New features:
|
|
|
|
|
- Implement Valgrind support, redzones, and quarantine.
|
2012-04-24 03:49:23 +08:00
|
|
|
- Add support for additional platforms:
|
2012-04-17 09:16:48 +08:00
|
|
|
+ FreeBSD
|
|
|
|
|
+ Mac OS X Lion
|
2012-04-23 07:21:06 +08:00
|
|
|
+ MinGW
|
2012-05-12 08:00:20 +08:00
|
|
|
+ Windows (no support yet for replacing the system malloc)
|
2012-04-17 09:16:48 +08:00
|
|
|
- Add support for additional architectures:
|
|
|
|
|
+ MIPS
|
|
|
|
|
+ SH4
|
|
|
|
|
+ Tilera
|
|
|
|
|
- Add support for cross compiling.
|
|
|
|
|
- Add nallocm(), which rounds a request size up to the nearest size class
|
|
|
|
|
without actually allocating.
|
|
|
|
|
- Implement aligned_alloc() (blame C11).
|
|
|
|
|
- Add the "thread.tcache.enabled" mallctl.
|
2012-04-18 07:39:33 +08:00
|
|
|
- Add the "opt.prof_final" mallctl.
|
2012-04-18 06:49:30 +08:00
|
|
|
- Update pprof (from gperftools 2.0).
|
2012-05-12 08:00:20 +08:00
|
|
|
- Add the --with-mangling option.
|
|
|
|
|
- Add the --disable-experimental option.
|
|
|
|
|
- Add the --disable-munmap option, and make it the default on Linux.
|
|
|
|
|
- Add the --enable-mremap option, which disables use of mremap(2) by default.
|
2012-04-17 09:16:48 +08:00
|
|
|
|
|
|
|
|
Incompatible changes:
|
|
|
|
|
- Enable stats by default.
|
|
|
|
|
- Enable fill by default.
|
|
|
|
|
- Disable lazy locking by default.
|
|
|
|
|
- Rename the "tcache.flush" mallctl to "thread.tcache.flush".
|
|
|
|
|
- Rename the "arenas.pagesize" mallctl to "arenas.page".
|
2012-04-18 07:39:33 +08:00
|
|
|
- Change the "opt.lg_prof_sample" default from 0 to 19 (1 B to 512 KiB).
|
|
|
|
|
- Change the "opt.prof_accum" default from true to false.
|
2012-04-17 09:16:48 +08:00
|
|
|
|
|
|
|
|
Removed features:
|
|
|
|
|
- Remove the swap feature, including the "config.swap", "swap.avail",
|
|
|
|
|
"swap.prezeroed", "swap.nfds", and "swap.fds" mallctls.
|
|
|
|
|
- Remove highruns statistics, including the
|
|
|
|
|
"stats.arenas.<i>.bins.<j>.highruns" and
|
|
|
|
|
"stats.arenas.<i>.lruns.<j>.highruns" mallctls.
|
|
|
|
|
- As part of small size class refactoring, remove the "opt.lg_[qc]space_max",
|
|
|
|
|
"arenas.cacheline", "arenas.subpage", "arenas.[tqcs]space_{min,max}", and
|
|
|
|
|
"arenas.[tqcs]bins" mallctls.
|
|
|
|
|
- Remove the "arenas.chunksize" mallctl.
|
|
|
|
|
- Remove the "opt.lg_prof_tcmax" option.
|
|
|
|
|
- Remove the "opt.lg_prof_bt_max" option.
|
|
|
|
|
- Remove the "opt.lg_tcache_gc_sweep" option.
|
|
|
|
|
- Remove the --disable-tiny option, including the "config.tiny" mallctl.
|
|
|
|
|
- Remove the --enable-dynamic-page-shift configure option.
|
|
|
|
|
- Remove the --enable-sysv configure option.
|
|
|
|
|
|
|
|
|
|
Bug fixes:
|
|
|
|
|
- Fix a statistics-related bug in the "thread.arena" mallctl that could cause
|
|
|
|
|
invalid statistics and crashes.
|
2012-04-24 03:49:23 +08:00
|
|
|
- Work around TLS deallocation via free() on Linux. This bug could cause
|
2012-04-17 09:16:48 +08:00
|
|
|
write-after-free memory corruption.
|
2012-04-23 07:00:11 +08:00
|
|
|
- Fix a potential deadlock that could occur during interval- and
|
|
|
|
|
growth-triggered heap profile dumps.
|
2012-05-11 11:59:39 +08:00
|
|
|
- Fix large calloc() zeroing bugs due to dropping chunk map unzeroed flags.
|
2012-04-22 04:33:48 +08:00
|
|
|
- Fix chunk_alloc_dss() to stop claiming memory is zeroed. This bug could
|
|
|
|
|
cause memory corruption and crashes with --enable-dss specified.
|
2012-04-23 07:00:11 +08:00
|
|
|
- Fix fork-related bugs that could cause deadlock in children between fork
|
|
|
|
|
and exec.
|
2012-04-17 09:16:48 +08:00
|
|
|
- Fix malloc_stats_print() to honor 'b' and 'l' in the opts parameter.
|
|
|
|
|
- Fix realloc(p, 0) to act like free(p).
|
|
|
|
|
- Do not enforce minimum alignment in memalign().
|
|
|
|
|
- Check for NULL pointer in malloc_usable_size().
|
2012-04-23 07:00:11 +08:00
|
|
|
- Fix an off-by-one heap profile statistics bug that could be observed in
|
|
|
|
|
interval- and growth-triggered heap profiles.
|
2012-04-26 04:12:46 +08:00
|
|
|
- Fix the "epoch" mallctl to update cached stats even if the passed in epoch
|
|
|
|
|
is 0.
|
2012-04-17 09:16:48 +08:00
|
|
|
- Fix bin->runcur management to fix a layout policy bug. This bug did not
|
|
|
|
|
affect correctness.
|
|
|
|
|
- Fix a bug in choose_arena_hard() that potentially caused more arenas to be
|
|
|
|
|
initialized than necessary.
|
|
|
|
|
- Add missing "opt.lg_tcache_max" mallctl implementation.
|
|
|
|
|
- Use glibc allocator hooks to make mixed allocator usage less likely.
|
|
|
|
|
- Fix build issues for --disable-tcache.
|
2012-04-21 04:42:21 +08:00
|
|
|
- Don't mangle pthread_create() when --with-private-namespace is specified.
|
2012-04-17 09:16:48 +08:00
|
|
|
|
2011-11-15 09:12:45 +08:00
|
|
|
* 2.2.5 (November 14, 2011)
|
|
|
|
|
|
|
|
|
|
Bug fixes:
|
|
|
|
|
- Fix huge_ralloc() race when using mremap(2). This is a serious bug that
|
|
|
|
|
could cause memory corruption and/or crashes.
|
|
|
|
|
- Fix huge_ralloc() to maintain chunk statistics.
|
|
|
|
|
- Fix malloc_stats_print(..., "a") output.
|
|
|
|
|
|
2011-11-06 12:46:23 +08:00
|
|
|
* 2.2.4 (November 5, 2011)
|
|
|
|
|
|
|
|
|
|
Bug fixes:
|
|
|
|
|
- Initialize arenas_tsd before using it. This bug existed for 2.2.[0-3], as
|
|
|
|
|
well as for --disable-tls builds in earlier releases.
|
|
|
|
|
- Do not assume a 4 KiB page size in test/rallocm.c.
|
|
|
|
|
|
2011-09-01 06:19:13 +08:00
|
|
|
* 2.2.3 (August 31, 2011)
|
|
|
|
|
|
|
|
|
|
This version fixes numerous bugs related to heap profiling.
|
|
|
|
|
|
|
|
|
|
Bug fixes:
|
|
|
|
|
- Fix a prof-related race condition. This bug could cause memory corruption,
|
|
|
|
|
but only occurred in non-default configurations (prof_accum:false).
|
|
|
|
|
- Fix off-by-one backtracing issues (make sure that prof_alloc_prep() is
|
|
|
|
|
excluded from backtraces).
|
|
|
|
|
- Fix a prof-related bug in realloc() (only triggered by OOM errors).
|
|
|
|
|
- Fix prof-related bugs in allocm() and rallocm().
|
|
|
|
|
- Fix prof_tdata_cleanup() for --disable-tls builds.
|
|
|
|
|
- Fix a relative include path, to fix objdir builds.
|
|
|
|
|
|
2011-07-31 07:59:13 +08:00
|
|
|
* 2.2.2 (July 30, 2011)
|
|
|
|
|
|
|
|
|
|
Bug fixes:
|
|
|
|
|
- Fix a build error for --disable-tcache.
|
|
|
|
|
- Fix assertions in arena_purge() (for real this time).
|
|
|
|
|
- Add the --with-private-namespace option. This is a workaround for symbol
|
|
|
|
|
conflicts that can inadvertently arise when using static libraries.
|
|
|
|
|
|
2011-03-31 06:01:08 +08:00
|
|
|
* 2.2.1 (March 30, 2011)
|
|
|
|
|
|
|
|
|
|
Bug fixes:
|
|
|
|
|
- Implement atomic operations for x86/x64. This fixes compilation failures
|
|
|
|
|
for versions of gcc that are still in wide use.
|
|
|
|
|
- Fix an assertion in arena_purge().
|
|
|
|
|
|
2011-03-23 06:30:22 +08:00
|
|
|
* 2.2.0 (March 22, 2011)
|
|
|
|
|
|
|
|
|
|
This version incorporates several improvements to algorithms and data
|
|
|
|
|
structures that tend to reduce fragmentation and increase speed.
|
|
|
|
|
|
|
|
|
|
New features:
|
|
|
|
|
- Add the "stats.cactive" mallctl.
|
|
|
|
|
- Update pprof (from google-perftools 1.7).
|
|
|
|
|
- Improve backtracing-related configuration logic, and add the
|
|
|
|
|
--disable-prof-libgcc option.
|
|
|
|
|
|
|
|
|
|
Bug fixes:
|
|
|
|
|
- Change default symbol visibility from "internal", to "hidden", which
|
|
|
|
|
decreases the overhead of library-internal function calls.
|
|
|
|
|
- Fix symbol visibility so that it is also set on OS X.
|
|
|
|
|
- Fix a build dependency regression caused by the introduction of the .pic.o
|
|
|
|
|
suffix for PIC object files.
|
|
|
|
|
- Add missing checks for mutex initialization failures.
|
|
|
|
|
- Don't use libgcc-based backtracing except on x64, where it is known to work.
|
|
|
|
|
- Fix deadlocks on OS X that were due to memory allocation in
|
|
|
|
|
pthread_mutex_lock().
|
|
|
|
|
- Heap profiling-specific fixes:
|
|
|
|
|
+ Fix memory corruption due to integer overflow in small region index
|
|
|
|
|
computation, when using a small enough sample interval that profiling
|
|
|
|
|
context pointers are stored in small run headers.
|
|
|
|
|
+ Fix a bootstrap ordering bug that only occurred with TLS disabled.
|
|
|
|
|
+ Fix a rallocm() rsize bug.
|
|
|
|
|
+ Fix error detection bugs for aligned memory allocation.
|
|
|
|
|
|
2011-03-15 07:41:03 +08:00
|
|
|
* 2.1.3 (March 14, 2011)
|
|
|
|
|
|
|
|
|
|
Bug fixes:
|
|
|
|
|
- Fix a cpp logic regression (due to the "thread.{de,}allocatedp" mallctl fix
|
|
|
|
|
for OS X in 2.1.2).
|
|
|
|
|
- Fix a "thread.arena" mallctl bug.
|
|
|
|
|
- Fix a thread cache stats merging bug.
|
|
|
|
|
|
2011-03-03 03:23:41 +08:00
|
|
|
* 2.1.2 (March 2, 2011)
|
|
|
|
|
|
|
|
|
|
Bug fixes:
|
|
|
|
|
- Fix "thread.{de,}allocatedp" mallctl for OS X.
|
|
|
|
|
- Add missing jemalloc.a to build system.
|
|
|
|
|
|
2011-02-08 14:48:35 +08:00
|
|
|
* 2.1.1 (January 31, 2011)
|
2011-02-01 12:08:56 +08:00
|
|
|
|
2011-02-08 14:48:35 +08:00
|
|
|
Bug fixes:
|
2011-02-01 12:08:56 +08:00
|
|
|
- Fix aligned huge reallocation (affected allocm()).
|
|
|
|
|
- Fix the ALLOCM_LG_ALIGN macro definition.
|
|
|
|
|
- Fix a heap dumping deadlock.
|
|
|
|
|
- Fix a "thread.arena" mallctl bug.
|
|
|
|
|
|
2011-02-08 14:48:35 +08:00
|
|
|
* 2.1.0 (December 3, 2010)
|
2010-12-04 09:02:16 +08:00
|
|
|
|
|
|
|
|
This version incorporates some optimizations that can't quite be considered
|
|
|
|
|
bug fixes.
|
|
|
|
|
|
|
|
|
|
New features:
|
|
|
|
|
- Use Linux's mremap(2) for huge object reallocation when possible.
|
|
|
|
|
- Avoid locking in mallctl*() when possible.
|
|
|
|
|
- Add the "thread.[de]allocatedp" mallctl's.
|
|
|
|
|
- Convert the manual page source from roff to DocBook, and generate both roff
|
|
|
|
|
and HTML manuals.
|
|
|
|
|
|
|
|
|
|
Bug fixes:
|
|
|
|
|
- Fix a crash due to incorrect bootstrap ordering. This only impacted
|
|
|
|
|
--enable-debug --enable-dss configurations.
|
|
|
|
|
- Fix a minor statistics bug for mallctl("swap.avail", ...).
|
|
|
|
|
|
2011-02-08 14:48:35 +08:00
|
|
|
* 2.0.1 (October 29, 2010)
|
2010-10-30 11:16:39 +08:00
|
|
|
|
|
|
|
|
Bug fixes:
|
|
|
|
|
- Fix a race condition in heap profiling that could cause undefined behavior
|
2011-02-01 12:08:56 +08:00
|
|
|
if "opt.prof_accum" were disabled.
|
2010-10-30 11:16:39 +08:00
|
|
|
- Add missing mutex unlocks for some OOM error paths in the heap profiling
|
|
|
|
|
code.
|
|
|
|
|
- Fix a compilation error for non-C99 builds.
|
|
|
|
|
|
2011-02-08 14:48:35 +08:00
|
|
|
* 2.0.0 (October 24, 2010)
|
2010-10-25 07:18:29 +08:00
|
|
|
|
|
|
|
|
This version focuses on the experimental *allocm() API, and on improved
|
|
|
|
|
run-time configuration/introspection. Nonetheless, numerous performance
|
|
|
|
|
improvements are also included.
|
|
|
|
|
|
|
|
|
|
New features:
|
2010-10-25 07:54:40 +08:00
|
|
|
- Implement the experimental {,r,s,d}allocm() API, which provides a superset
|
|
|
|
|
of the functionality available via malloc(), calloc(), posix_memalign(),
|
|
|
|
|
realloc(), malloc_usable_size(), and free(). These functions can be used to
|
|
|
|
|
allocate/reallocate aligned zeroed memory, ask for optional extra memory
|
|
|
|
|
during reallocation, prevent object movement during reallocation, etc.
|
|
|
|
|
- Replace JEMALLOC_OPTIONS/JEMALLOC_PROF_PREFIX with MALLOC_CONF, which is
|
|
|
|
|
more human-readable, and more flexible. For example:
|
|
|
|
|
JEMALLOC_OPTIONS=AJP
|
|
|
|
|
is now:
|
|
|
|
|
MALLOC_CONF=abort:true,fill:true,stats_print:true
|
|
|
|
|
- Port to Apple OS X. Sponsored by Mozilla.
|
|
|
|
|
- Make it possible for the application to control thread-->arena mappings via
|
|
|
|
|
the "thread.arena" mallctl.
|
|
|
|
|
- Add compile-time support for all TLS-related functionality via pthreads TSD.
|
|
|
|
|
This is mainly of interest for OS X, which does not support TLS, but has a
|
|
|
|
|
TSD implementation with similar performance.
|
|
|
|
|
- Override memalign() and valloc() if they are provided by the system.
|
|
|
|
|
- Add the "arenas.purge" mallctl, which can be used to synchronously purge all
|
|
|
|
|
dirty unused pages.
|
|
|
|
|
- Make cumulative heap profiling data optional, so that it is possible to
|
|
|
|
|
limit the amount of memory consumed by heap profiling data structures.
|
|
|
|
|
- Add per thread allocation counters that can be accessed via the
|
|
|
|
|
"thread.allocated" and "thread.deallocated" mallctls.
|
2010-10-25 07:18:29 +08:00
|
|
|
|
|
|
|
|
Incompatible changes:
|
2010-10-25 07:54:40 +08:00
|
|
|
- Remove JEMALLOC_OPTIONS and malloc_options (see MALLOC_CONF above).
|
|
|
|
|
- Increase default backtrace depth from 4 to 128 for heap profiling.
|
|
|
|
|
- Disable interval-based profile dumps by default.
|
2010-10-25 07:18:29 +08:00
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Bug fixes:
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|
|
- Remove bad assertions in fork handler functions. These assertions could
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cause aborts for some combinations of configure settings.
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|
|
- Fix strerror_r() usage to deal with non-standard semantics in GNU libc.
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|
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- Fix leak context reporting. This bug tended to cause the number of contexts
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|
to be underreported (though the reported number of objects and bytes were
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correct).
|
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|
|
- Fix a realloc() bug for large in-place growing reallocation. This bug could
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|
cause memory corruption, but it was hard to trigger.
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- Fix an allocation bug for small allocations that could be triggered if
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multiple threads raced to create a new run of backing pages.
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- Enhance the heap profiler to trigger samples based on usable size, rather
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than request size.
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- Fix a heap profiling bug due to sometimes losing track of requested object
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|
size for sampled objects.
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|
2011-02-08 14:48:35 +08:00
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* 1.0.3 (August 12, 2010)
|
2010-10-25 07:18:29 +08:00
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|
|
|
Bug fixes:
|
|
|
|
|
- Fix the libunwind-based implementation of stack backtracing (used for heap
|
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|
|
|
profiling). This bug could cause zero-length backtraces to be reported.
|
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|
|
- Add a missing mutex unlock in library initialization code. If multiple
|
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|
|
threads raced to initialize malloc, some of them could end up permanently
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|
blocked.
|
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|
|
2011-02-08 14:48:35 +08:00
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|
* 1.0.2 (May 11, 2010)
|
2010-10-25 07:18:29 +08:00
|
|
|
|
|
|
|
|
Bug fixes:
|
|
|
|
|
- Fix junk filling of large objects, which could cause memory corruption.
|
|
|
|
|
- Add MAP_NORESERVE support for chunk mapping, because otherwise virtual
|
|
|
|
|
memory limits could cause swap file configuration to fail. Contributed by
|
|
|
|
|
Jordan DeLong.
|
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|
|
|
2011-02-08 14:48:35 +08:00
|
|
|
* 1.0.1 (April 14, 2010)
|
2010-10-25 07:18:29 +08:00
|
|
|
|
|
|
|
|
Bug fixes:
|
|
|
|
|
- Fix compilation when --enable-fill is specified.
|
|
|
|
|
- Fix threads-related profiling bugs that affected accuracy and caused memory
|
|
|
|
|
to be leaked during thread exit.
|
|
|
|
|
- Fix dirty page purging race conditions that could cause crashes.
|
|
|
|
|
- Fix crash in tcache flushing code during thread destruction.
|
|
|
|
|
|
2011-02-08 14:48:35 +08:00
|
|
|
* 1.0.0 (April 11, 2010)
|
2010-10-25 07:18:29 +08:00
|
|
|
|
|
|
|
|
This release focuses on speed and run-time introspection. Numerous
|
|
|
|
|
algorithmic improvements make this release substantially faster than its
|
|
|
|
|
predecessors.
|
|
|
|
|
|
|
|
|
|
New features:
|
|
|
|
|
- Implement autoconf-based configuration system.
|
|
|
|
|
- Add mallctl*(), for the purposes of introspection and run-time
|
|
|
|
|
configuration.
|
|
|
|
|
- Make it possible for the application to manually flush a thread's cache, via
|
|
|
|
|
the "tcache.flush" mallctl.
|
|
|
|
|
- Base maximum dirty page count on proportion of active memory.
|
2015-07-04 00:06:06 +08:00
|
|
|
- Compute various additional run-time statistics, including per size class
|
2010-10-25 07:18:29 +08:00
|
|
|
statistics for large objects.
|
|
|
|
|
- Expose malloc_stats_print(), which can be called repeatedly by the
|
|
|
|
|
application.
|
|
|
|
|
- Simplify the malloc_message() signature to only take one string argument,
|
|
|
|
|
and incorporate an opaque data pointer argument for use by the application
|
|
|
|
|
in combination with malloc_stats_print().
|
|
|
|
|
- Add support for allocation backed by one or more swap files, and allow the
|
|
|
|
|
application to disable over-commit if swap files are in use.
|
|
|
|
|
- Implement allocation profiling and leak checking.
|
|
|
|
|
|
|
|
|
|
Removed features:
|
|
|
|
|
- Remove the dynamic arena rebalancing code, since thread-specific caching
|
|
|
|
|
reduces its utility.
|
|
|
|
|
|
|
|
|
|
Bug fixes:
|
|
|
|
|
- Modify chunk allocation to work when address space layout randomization
|
|
|
|
|
(ASLR) is in use.
|
|
|
|
|
- Fix thread cleanup bugs related to TLS destruction.
|
|
|
|
|
- Handle 0-size allocation requests in posix_memalign().
|
|
|
|
|
- Fix a chunk leak. The leaked chunks were never touched, so this impacted
|
|
|
|
|
virtual memory usage, but not physical memory usage.
|
|
|
|
|
|
2011-02-08 14:48:35 +08:00
|
|
|
* linux_2008082[78]a (August 27/28, 2008)
|
2010-10-25 07:18:29 +08:00
|
|
|
|
|
|
|
|
These snapshot releases are the simple result of incorporating Linux-specific
|
|
|
|
|
support into the FreeBSD malloc sources.
|
|
|
|
|
|
|
|
|
|
--------------------------------------------------------------------------------
|
|
|
|
|
vim:filetype=text:textwidth=80
|
