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[redis.git] / deps / jemalloc / INSTALL

diff --git a/deps/jemalloc/INSTALL b/deps/jemalloc/INSTALL
index 2a1e469cb8b01a81758e16cf31bb8fe0cb0f6bbe..e40a7eddca2e982e9b3d997eddd8604cb71dcd97 100644 (file)
--- a/deps/jemalloc/INSTALL
+++ b/deps/jemalloc/INSTALL
@@ -26,6 +26,19 @@ any of the following arguments (not a definitive list) to 'configure':
     Embed one or more library paths, so that libjemalloc can find the libraries
     it is linked to.  This works only on ELF-based systems.
 
     Embed one or more library paths, so that libjemalloc can find the libraries
     it is linked to.  This works only on ELF-based systems.
 

+--with-mangling=<map>
+    Mangle public symbols specified in <map> which is a comma-separated list of
+    name:mangled pairs.
+
+    For example, to use ld's --wrap option as an alternative method for
+    overriding libc's malloc implementation, specify something like:
+
+      --with-mangling=malloc:__wrap_malloc,free:__wrap_free[...]
+
+    Note that mangling happens prior to application of the prefix specified by
+    --with-jemalloc-prefix, and mangled symbols are then ignored when applying
+    the prefix.
+

 --with-jemalloc-prefix=<prefix>
     Prefix all public APIs with <prefix>.  For example, if <prefix> is
     "prefix_", API changes like the following occur:
 --with-jemalloc-prefix=<prefix>
     Prefix all public APIs with <prefix>.  For example, if <prefix> is
     "prefix_", API changes like the following occur:


@@ -62,8 +75,8 @@ any of the following arguments (not a definitive list) to 'configure':
     Enable assertions and validation code.  This incurs a substantial
     performance hit, but is very useful during application development.
 
     Enable assertions and validation code.  This incurs a substantial
     performance hit, but is very useful during application development.
 

---enable-stats
-    Enable statistics gathering functionality.  See the "opt.stats_print"
+--disable-stats
+    Disable statistics gathering functionality.  See the "opt.stats_print"

     option documentation for usage details.
 
 --enable-prof
     option documentation for usage details.
 
 --enable-prof


@@ -90,51 +103,50 @@ any of the following arguments (not a definitive list) to 'configure':
     Statically link against the specified libunwind.a rather than dynamically
     linking with -lunwind.
 
     Statically link against the specified libunwind.a rather than dynamically
     linking with -lunwind.
 

---disable-tiny
-    Disable tiny (sub-quantum-sized) object support.  Technically it is not
-    legal for a malloc implementation to allocate objects with less than
-    quantum alignment (8 or 16 bytes, depending on architecture), but in
-    practice it never causes any problems if, for example, 4-byte allocations
-    are 4-byte-aligned.
-

 --disable-tcache
     Disable thread-specific caches for small objects.  Objects are cached and
     released in bulk, thus reducing the total number of mutex operations.  See
     the "opt.tcache" option for usage details.
 
 --disable-tcache
     Disable thread-specific caches for small objects.  Objects are cached and
     released in bulk, thus reducing the total number of mutex operations.  See
     the "opt.tcache" option for usage details.
 

---enable-swap
-    Enable mmap()ed swap file support.  When this feature is built in, it is
-    possible to specify one or more files that act as backing store.  This
-    effectively allows for per application swap files.
+--enable-mremap
+    Enable huge realloc() via mremap(2).  mremap() is disabled by default
+    because the flavor used is specific to Linux, which has a quirk in its
+    virtual memory allocation algorithm that causes semi-permanent VM map holes
+    under normal jemalloc operation.
+
+--disable-munmap
+    Disable virtual memory deallocation via munmap(2); instead keep track of
+    the virtual memory for later use.  munmap() is disabled by default (i.e.
+    --disable-munmap is implied) on Linux, which has a quirk in its virtual
+    memory allocation algorithm that causes semi-permanent VM map holes under
+    normal jemalloc operation.

 
 --enable-dss
     Enable support for page allocation/deallocation via sbrk(2), in addition to
     mmap(2).
 
 
 --enable-dss
     Enable support for page allocation/deallocation via sbrk(2), in addition to
     mmap(2).
 

---enable-fill
-    Enable support for junk/zero filling of memory.  See the "opt.junk"/
-    "opt.zero" option documentation for usage details.
+--disable-fill
+    Disable support for junk/zero filling of memory, quarantine, and redzones.
+    See the "opt.junk", "opt.zero", "opt.quarantine", and "opt.redzone" option
+    documentation for usage details.
+
+--disable-valgrind
+    Disable support for Valgrind.
+
+--disable-experimental
+    Disable support for the experimental API (*allocm()).
+
+--enable-utrace
+    Enable utrace(2)-based allocation tracing.  This feature is not broadly
+    portable (FreeBSD has it, but Linux and OS X do not).

 
 --enable-xmalloc
     Enable support for optional immediate termination due to out-of-memory
     errors, as is commonly implemented by "xmalloc" wrapper function for malloc.
     See the "opt.xmalloc" option documentation for usage details.
 
 
 --enable-xmalloc
     Enable support for optional immediate termination due to out-of-memory
     errors, as is commonly implemented by "xmalloc" wrapper function for malloc.
     See the "opt.xmalloc" option documentation for usage details.
 

---enable-sysv
-    Enable support for System V semantics, wherein malloc(0) returns NULL
-    rather than a minimal allocation.  See the "opt.sysv" option documentation
-    for usage details.
-
---enable-dynamic-page-shift
-    Under most conditions, the system page size never changes (usually 4KiB or
-    8KiB, depending on architecture and configuration), and unless this option
-    is enabled, jemalloc assumes that page size can safely be determined during
-    configuration and hard-coded.  Enabling dynamic page size determination has
-    a measurable impact on performance, since the compiler is forced to load
-    the page size from memory rather than embedding immediate values.
-
---disable-lazy-lock
-    Disable code that wraps pthread_create() to detect when an application
+--enable-lazy-lock
+    Enable code that wraps pthread_create() to detect when an application

     switches from single-threaded to multi-threaded mode, so that it can avoid
     mutex locking/unlocking operations while in single-threaded mode.  In
     practice, this feature usually has little impact on performance unless
     switches from single-threaded to multi-threaded mode, so that it can avoid
     mutex locking/unlocking operations while in single-threaded mode.  In
     practice, this feature usually has little impact on performance unless


@@ -181,11 +193,24 @@ PATH="?"
 
 === Advanced compilation =======================================================
 
 
 === Advanced compilation =======================================================
 

+To build only parts of jemalloc, use the following targets:
+
+    build_lib_shared
+    build_lib_static
+    build_lib
+    build_doc_html
+    build_doc_man
+    build_doc
+

 To install only parts of jemalloc, use the following targets:
 
     install_bin
     install_include
 To install only parts of jemalloc, use the following targets:
 
     install_bin
     install_include

+    install_lib_shared
+    install_lib_static

     install_lib
     install_lib

+    install_doc_html
+    install_doc_man

     install_doc
 
 To clean up build results to varying degrees, use the following make targets:
     install_doc
 
 To clean up build results to varying degrees, use the following make targets:


@@ -248,10 +273,6 @@ directory, issue configuration and build commands:
 
 The manual page is generated in both html and roff formats.  Any web browser
 can be used to view the html manual.  The roff manual page can be formatted
 
 The manual page is generated in both html and roff formats.  Any web browser
 can be used to view the html manual.  The roff manual page can be formatted

-prior to installation via any of the following commands:
+prior to installation via the following command:

 
     nroff -man -t doc/jemalloc.3
 
     nroff -man -t doc/jemalloc.3

-
-    groff -man -t -Tps doc/jemalloc.3 | ps2pdf - doc/jemalloc.3.pdf
-
-    (cd doc; groff -man -man-ext -t -Thtml jemalloc.3 > jemalloc.3.html)