09f99c2a92
jemalloc 5 doesn't immediately release memory back to the OS, instead there's a decaying mechanism, which doesn't work when there's no traffic (no allocations). this is most evident if there's no traffic after flushdb, the RSS will remain high. 1) enable jemalloc background purging 2) explicitly purge in flushdb
113 lines
4.0 KiB
C
113 lines
4.0 KiB
C
/* zmalloc - total amount of allocated memory aware version of malloc()
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*
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* Copyright (c) 2009-2010, Salvatore Sanfilippo <antirez at gmail dot com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of Redis nor the names of its contributors may be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __ZMALLOC_H
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#define __ZMALLOC_H
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/* Double expansion needed for stringification of macro values. */
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#define __xstr(s) __str(s)
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#define __str(s) #s
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#if defined(USE_TCMALLOC)
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#define ZMALLOC_LIB ("tcmalloc-" __xstr(TC_VERSION_MAJOR) "." __xstr(TC_VERSION_MINOR))
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#include <google/tcmalloc.h>
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#if (TC_VERSION_MAJOR == 1 && TC_VERSION_MINOR >= 6) || (TC_VERSION_MAJOR > 1)
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#define HAVE_MALLOC_SIZE 1
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#define zmalloc_size(p) tc_malloc_size(p)
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#else
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#error "Newer version of tcmalloc required"
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#endif
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#elif defined(USE_JEMALLOC)
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#define ZMALLOC_LIB ("jemalloc-" __xstr(JEMALLOC_VERSION_MAJOR) "." __xstr(JEMALLOC_VERSION_MINOR) "." __xstr(JEMALLOC_VERSION_BUGFIX))
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#include <jemalloc/jemalloc.h>
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#if (JEMALLOC_VERSION_MAJOR == 2 && JEMALLOC_VERSION_MINOR >= 1) || (JEMALLOC_VERSION_MAJOR > 2)
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#define HAVE_MALLOC_SIZE 1
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#define zmalloc_size(p) je_malloc_usable_size(p)
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#else
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#error "Newer version of jemalloc required"
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#endif
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#elif defined(__APPLE__)
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#include <malloc/malloc.h>
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#define HAVE_MALLOC_SIZE 1
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#define zmalloc_size(p) malloc_size(p)
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#endif
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#ifndef ZMALLOC_LIB
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#define ZMALLOC_LIB "libc"
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#ifdef __GLIBC__
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#include <malloc.h>
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#define HAVE_MALLOC_SIZE 1
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#define zmalloc_size(p) malloc_usable_size(p)
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#endif
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#endif
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/* We can enable the Redis defrag capabilities only if we are using Jemalloc
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* and the version used is our special version modified for Redis having
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* the ability to return per-allocation fragmentation hints. */
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#if defined(USE_JEMALLOC) && defined(JEMALLOC_FRAG_HINT)
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#define HAVE_DEFRAG
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#endif
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void *zmalloc(size_t size);
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void *zcalloc(size_t size);
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void *zrealloc(void *ptr, size_t size);
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void zfree(void *ptr);
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char *zstrdup(const char *s);
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size_t zmalloc_used_memory(void);
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void zmalloc_set_oom_handler(void (*oom_handler)(size_t));
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size_t zmalloc_get_rss(void);
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int zmalloc_get_allocator_info(size_t *allocated, size_t *active, size_t *resident);
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void set_jemalloc_bg_thread(int enable);
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int jemalloc_purge();
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size_t zmalloc_get_private_dirty(long pid);
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size_t zmalloc_get_smap_bytes_by_field(char *field, long pid);
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size_t zmalloc_get_memory_size(void);
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void zlibc_free(void *ptr);
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#ifdef HAVE_DEFRAG
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void zfree_no_tcache(void *ptr);
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void *zmalloc_no_tcache(size_t size);
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#endif
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#ifndef HAVE_MALLOC_SIZE
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size_t zmalloc_size(void *ptr);
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size_t zmalloc_usable(void *ptr);
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#else
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#define zmalloc_usable(p) zmalloc_size(p)
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#endif
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#ifdef REDIS_TEST
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int zmalloc_test(int argc, char **argv);
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#endif
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#endif /* __ZMALLOC_H */
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