mirror of
https://github.com/jemalloc/jemalloc.git
synced 2026-07-22 12:34:35 +00:00
807a9a3e17
When allocating runs with alignment stricter than one page, commit after trimming the head/tail from the initial over-sized allocation, rather than before trimming. This avoids creating clean-but-committed runs; such runs do not get purged (and decommitted as a side effect), so they can cause unnecessary long-term run fragmentation. Do not commit decommitted memory in chunk_recycle() unless asked to by the caller. This allows recycled arena chunks to start in the decommitted state, and therefore increases the likelihood that purging after run deallocation will allow the arena chunk to become a single unused run, thus allowing the chunk as a whole to be discarded. This resolves #766.
jemalloc is a general purpose malloc(3) implementation that emphasizes fragmentation avoidance and scalable concurrency support. jemalloc first came into use as the FreeBSD libc allocator in 2005, and since then it has found its way into numerous applications that rely on its predictable behavior. In 2010 jemalloc development efforts broadened to include developer support features such as heap profiling, Valgrind integration, and extensive monitoring/tuning hooks. Modern jemalloc releases continue to be integrated back into FreeBSD, and therefore versatility remains critical. Ongoing development efforts trend toward making jemalloc among the best allocators for a broad range of demanding applications, and eliminating/mitigating weaknesses that have practical repercussions for real world applications. The COPYING file contains copyright and licensing information. The INSTALL file contains information on how to configure, build, and install jemalloc. The ChangeLog file contains a brief summary of changes for each release. URL: http://jemalloc.net/