c67c3e4a63
Control use of munmap(2) via a run-time option rather than a compile-time option (with the same per platform default). The old behavior of --disable-munmap can be achieved with --with-malloc-conf=munmap:false. This partially resolves #580.
346 lines
13 KiB
Plaintext
346 lines
13 KiB
Plaintext
Building and installing a packaged release of jemalloc can be as simple as
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typing the following while in the root directory of the source tree:
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./configure
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make
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make install
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If building from unpackaged developer sources, the simplest command sequence
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that might work is:
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./autogen.sh
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make dist
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make
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make install
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Note that documentation is not built by the default target because doing so
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would create a dependency on xsltproc in packaged releases, hence the
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requirement to either run 'make dist' or avoid installing docs via the various
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install_* targets documented below.
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=== Advanced configuration =====================================================
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The 'configure' script supports numerous options that allow control of which
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functionality is enabled, where jemalloc is installed, etc. Optionally, pass
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any of the following arguments (not a definitive list) to 'configure':
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--help
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Print a definitive list of options.
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--prefix=<install-root-dir>
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Set the base directory in which to install. For example:
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./configure --prefix=/usr/local
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will cause files to be installed into /usr/local/include, /usr/local/lib,
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and /usr/local/man.
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--with-version=<major>.<minor>.<bugfix>-<nrev>-g<gid>
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Use the specified version string rather than trying to generate one (if in
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a git repository) or use existing the VERSION file (if present).
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--with-rpath=<colon-separated-rpath>
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Embed one or more library paths, so that libjemalloc can find the libraries
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it is linked to. This works only on ELF-based systems.
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--with-mangling=<map>
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Mangle public symbols specified in <map> which is a comma-separated list of
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name:mangled pairs.
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For example, to use ld's --wrap option as an alternative method for
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overriding libc's malloc implementation, specify something like:
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--with-mangling=malloc:__wrap_malloc,free:__wrap_free[...]
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Note that mangling happens prior to application of the prefix specified by
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--with-jemalloc-prefix, and mangled symbols are then ignored when applying
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the prefix.
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--with-jemalloc-prefix=<prefix>
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Prefix all public APIs with <prefix>. For example, if <prefix> is
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"prefix_", API changes like the following occur:
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malloc() --> prefix_malloc()
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malloc_conf --> prefix_malloc_conf
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/etc/malloc.conf --> /etc/prefix_malloc.conf
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MALLOC_CONF --> PREFIX_MALLOC_CONF
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This makes it possible to use jemalloc at the same time as the system
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allocator, or even to use multiple copies of jemalloc simultaneously.
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By default, the prefix is "", except on OS X, where it is "je_". On OS X,
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jemalloc overlays the default malloc zone, but makes no attempt to actually
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replace the "malloc", "calloc", etc. symbols.
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--without-export
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Don't export public APIs. This can be useful when building jemalloc as a
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static library, or to avoid exporting public APIs when using the zone
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allocator on OSX.
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--with-private-namespace=<prefix>
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Prefix all library-private APIs with <prefix>je_. For shared libraries,
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symbol visibility mechanisms prevent these symbols from being exported, but
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for static libraries, naming collisions are a real possibility. By
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default, <prefix> is empty, which results in a symbol prefix of je_ .
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--with-install-suffix=<suffix>
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Append <suffix> to the base name of all installed files, such that multiple
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versions of jemalloc can coexist in the same installation directory. For
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example, libjemalloc.so.0 becomes libjemalloc<suffix>.so.0.
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--with-malloc-conf=<malloc_conf>
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Embed <malloc_conf> as a run-time options string that is processed prior to
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the malloc_conf global variable, the /etc/malloc.conf symlink, and the
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MALLOC_CONF environment variable. For example, to change the default decay
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time to 30 seconds:
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--with-malloc-conf=decay_time:30
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--enable-debug
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Enable assertions and validation code. This incurs a substantial
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performance hit, but is very useful during application development.
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--disable-stats
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Disable statistics gathering functionality. See the "opt.stats_print"
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option documentation for usage details.
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--enable-prof
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Enable heap profiling and leak detection functionality. See the "opt.prof"
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option documentation for usage details. When enabled, there are several
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approaches to backtracing, and the configure script chooses the first one
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in the following list that appears to function correctly:
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+ libunwind (requires --enable-prof-libunwind)
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+ libgcc (unless --disable-prof-libgcc)
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+ gcc intrinsics (unless --disable-prof-gcc)
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--enable-prof-libunwind
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Use the libunwind library (http://www.nongnu.org/libunwind/) for stack
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backtracing.
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--disable-prof-libgcc
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Disable the use of libgcc's backtracing functionality.
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--disable-prof-gcc
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Disable the use of gcc intrinsics for backtracing.
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--with-static-libunwind=<libunwind.a>
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Statically link against the specified libunwind.a rather than dynamically
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linking with -lunwind.
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--disable-fill
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Disable support for junk/zero filling of memory. See the "opt.junk" and
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"opt.zero" option documentation for usage details.
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--disable-zone-allocator
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Disable zone allocator for Darwin. This means jemalloc won't be hooked as
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the default allocator on OSX/iOS.
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--enable-utrace
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Enable utrace(2)-based allocation tracing. This feature is not broadly
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portable (FreeBSD has it, but Linux and OS X do not).
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--enable-xmalloc
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Enable support for optional immediate termination due to out-of-memory
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errors, as is commonly implemented by "xmalloc" wrapper function for malloc.
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See the "opt.xmalloc" option documentation for usage details.
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--enable-lazy-lock
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Enable code that wraps pthread_create() to detect when an application
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switches from single-threaded to multi-threaded mode, so that it can avoid
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mutex locking/unlocking operations while in single-threaded mode. In
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practice, this feature usually has little impact on performance unless
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thread-specific caching is disabled.
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--disable-cache-oblivious
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Disable cache-oblivious large allocation alignment for large allocation
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requests with no alignment constraints. If this feature is disabled, all
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large allocations are page-aligned as an implementation artifact, which can
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severely harm CPU cache utilization. However, the cache-oblivious layout
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comes at the cost of one extra page per large allocation, which in the
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most extreme case increases physical memory usage for the 16 KiB size class
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to 20 KiB.
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--disable-syscall
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Disable use of syscall(2) rather than {open,read,write,close}(2). This is
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intended as a workaround for systems that place security limitations on
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syscall(2).
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--disable-cxx
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Disable C++ integration. This will cause new and delete operator
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implementations to be omitted.
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--with-xslroot=<path>
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Specify where to find DocBook XSL stylesheets when building the
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documentation.
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--with-lg-page=<lg-page>
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Specify the base 2 log of the allocator page size, which must in turn be at
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least as large as the system page size. By default the configure script
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determines the host's page size and sets the allocator page size equal to
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the system page size, so this option need not be specified unless the
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system page size may change between configuration and execution, e.g. when
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cross compiling.
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--with-lg-page-sizes=<lg-page-sizes>
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Specify the comma-separated base 2 logs of the page sizes to support. This
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option may be useful when cross-compiling in combination with
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--with-lg-page, but its primary use case is for integration with FreeBSD's
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libc, wherein jemalloc is embedded.
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--with-lg-hugepage=<lg-hugepage>
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Specify the base 2 log of the system huge page size. This option is useful
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when cross compiling, or when overriding the default for systems that do
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not explicitly support huge pages.
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--with-lg-quantum=<lg-quantum>
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Specify the base 2 log of the minimum allocation alignment. jemalloc needs
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to know the minimum alignment that meets the following C standard
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requirement (quoted from the April 12, 2011 draft of the C11 standard):
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The pointer returned if the allocation succeeds is suitably aligned so
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that it may be assigned to a pointer to any type of object with a
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fundamental alignment requirement and then used to access such an object
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or an array of such objects in the space allocated [...]
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This setting is architecture-specific, and although jemalloc includes known
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safe values for the most commonly used modern architectures, there is a
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wrinkle related to GNU libc (glibc) that may impact your choice of
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<lg-quantum>. On most modern architectures, this mandates 16-byte
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alignment (<lg-quantum>=4), but the glibc developers chose not to meet this
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requirement for performance reasons. An old discussion can be found at
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https://sourceware.org/bugzilla/show_bug.cgi?id=206 . Unlike glibc,
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jemalloc does follow the C standard by default (caveat: jemalloc
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technically cheats for size classes smaller than the quantum), but the fact
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that Linux systems already work around this allocator noncompliance means
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that it is generally safe in practice to let jemalloc's minimum alignment
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follow glibc's lead. If you specify --with-lg-quantum=3 during
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configuration, jemalloc will provide additional size classes that are not
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16-byte-aligned (24, 40, and 56).
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The following environment variables (not a definitive list) impact configure's
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behavior:
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CFLAGS="?"
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CXXFLAGS="?"
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Pass these flags to the C/C++ compiler. Any flags set by the configure
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script are prepended, which means explicitly set flags generally take
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precedence. Take care when specifying flags such as -Werror, because
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configure tests may be affected in undesirable ways.
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EXTRA_CFLAGS="?"
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EXTRA_CXXFLAGS="?"
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Append these flags to CFLAGS/CXXFLAGS, without passing them to the
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compiler(s) during configuration. This makes it possible to add flags such
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as -Werror, while allowing the configure script to determine what other
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flags are appropriate for the specified configuration.
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CPPFLAGS="?"
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Pass these flags to the C preprocessor. Note that CFLAGS is not passed to
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'cpp' when 'configure' is looking for include files, so you must use
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CPPFLAGS instead if you need to help 'configure' find header files.
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LD_LIBRARY_PATH="?"
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'ld' uses this colon-separated list to find libraries.
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LDFLAGS="?"
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Pass these flags when linking.
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PATH="?"
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'configure' uses this to find programs.
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In some cases it may be necessary to work around configuration results that do
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not match reality. For example, Linux 4.5 added support for the MADV_FREE flag
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to madvise(2), which can cause problems if building on a host with MADV_FREE
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support and deploying to a target without. To work around this, use a cache
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file to override the relevant configuration variable defined in configure.ac,
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e.g.:
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echo "je_cv_madv_free=no" > config.cache && ./configure -C
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=== Advanced compilation =======================================================
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To build only parts of jemalloc, use the following targets:
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build_lib_shared
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build_lib_static
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build_lib
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build_doc_html
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build_doc_man
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build_doc
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To install only parts of jemalloc, use the following targets:
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install_bin
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install_include
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install_lib_shared
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install_lib_static
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install_lib
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install_doc_html
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install_doc_man
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install_doc
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To clean up build results to varying degrees, use the following make targets:
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clean
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distclean
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relclean
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=== Advanced installation ======================================================
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Optionally, define make variables when invoking make, including (not
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exclusively):
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INCLUDEDIR="?"
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Use this as the installation prefix for header files.
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LIBDIR="?"
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Use this as the installation prefix for libraries.
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MANDIR="?"
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Use this as the installation prefix for man pages.
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DESTDIR="?"
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Prepend DESTDIR to INCLUDEDIR, LIBDIR, DATADIR, and MANDIR. This is useful
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when installing to a different path than was specified via --prefix.
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CC="?"
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Use this to invoke the C compiler.
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CFLAGS="?"
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Pass these flags to the compiler.
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CPPFLAGS="?"
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Pass these flags to the C preprocessor.
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LDFLAGS="?"
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Pass these flags when linking.
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PATH="?"
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Use this to search for programs used during configuration and building.
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=== Development ================================================================
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If you intend to make non-trivial changes to jemalloc, use the 'autogen.sh'
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script rather than 'configure'. This re-generates 'configure', enables
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configuration dependency rules, and enables re-generation of automatically
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generated source files.
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The build system supports using an object directory separate from the source
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tree. For example, you can create an 'obj' directory, and from within that
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directory, issue configuration and build commands:
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autoconf
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mkdir obj
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cd obj
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../configure --enable-autogen
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make
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=== Documentation ==============================================================
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The manual page is generated in both html and roff formats. Any web browser
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can be used to view the html manual. The roff manual page can be formatted
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prior to installation via the following command:
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nroff -man -t doc/jemalloc.3
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