Update ChangeLog for 5.3.0.
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Qi Wang
Qi Wang
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ChangeLog
100
ChangeLog
@ -4,6 +4,106 @@ brevity. Much more detail can be found in the git revision history:
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https://github.com/jemalloc/jemalloc
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https://github.com/jemalloc/jemalloc
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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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* 5.2.1 (August 5, 2019)
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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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This release is primarily about Windows. A critical virtual memory leak is
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