Date: Wed, 6 Feb 2008 02:59:54 +0000 (UTC) From: Jason Evans <jasone@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/lib/libc/stdlib malloc.3 malloc.c Message-ID: <200802060259.m162xsv4050323@repoman.freebsd.org>
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jasone 2008-02-06 02:59:54 UTC
FreeBSD src repository
Modified files:
lib/libc/stdlib malloc.3 malloc.c
Log:
Track dirty unused pages so that they can be purged if they exceed a
threshold, according to the 'F' MALLOC_OPTIONS flag. This obsoletes the
'H' flag.
Try to realloc() large objects in place. This substantially speeds up
incremental large reallocations in the common case.
Fix a bug in arena_ralloc() that caused relocation of sub-page objects
even if the old and new sizes were in the same size class.
Maintain trees of runs and simplify the per-chunk page map. This allows
logarithmic-time searching for sufficiently large runs in
arena_run_alloc(), whereas the previous algorithm required linear time
in the worst case.
Break various large functions into smaller sub-functions, and inline
only the functions that are in the fast path for small object
allocation/deallocation.
Remove an unnecessary check in base_pages_alloc_mmap().
Avoid integer division in choose_arena() for the NO_TLS case on
single-CPU systems.
Revision Changes Path
1.77 +17 -15 src/lib/libc/stdlib/malloc.3
1.162 +960 -668 src/lib/libc/stdlib/malloc.c
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