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| author | Wangyang Guo <wangyang.guo@intel.com> | 2024-11-26 15:33:38 +0800 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2024-11-27 08:24:09 +0800 |
| commit | c69e8cccaff8f2d89cee43202623b33e6ef5d24a (patch) | |
| tree | 08817e40b4eeaab83cc382348c92c3c8e67fd371 /malloc | |
| parent | 4836a9af89f1b4d482e6c72ff67e36226d36434c (diff) | |
| download | glibc-c69e8cccaff8f2d89cee43202623b33e6ef5d24a.zip glibc-c69e8cccaff8f2d89cee43202623b33e6ef5d24a.tar.gz glibc-c69e8cccaff8f2d89cee43202623b33e6ef5d24a.tar.bz2 | |
malloc: Avoid func call for tcache quick path in free()
Tcache is an important optimzation to accelerate memory free(), things
within this code path should be kept as simple as possible. This commit
try to remove the function call when free() invokes tcache code path by
inlining _int_free().
Result of bench-malloc-thread benchmark
Test Platform: Xeon-8380
Ratio: New / Original time_per_iteration (Lower is Better)
Threads# | Ratio
-----------|------
1 thread | 0.879
4 threads | 0.874
The performance data shows it can improve bench-malloc-thread benchmark
by ~12% in both single thread and multi-thread scenario.
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
Diffstat (limited to 'malloc')
| -rw-r--r-- | malloc/malloc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/malloc/malloc.c b/malloc/malloc.c index 32dbc27..81ddd2c 100644 --- a/malloc/malloc.c +++ b/malloc/malloc.c @@ -4677,7 +4677,7 @@ _int_free_chunk (mstate av, mchunkptr p, INTERNAL_SIZE_T size, int have_lock) P has already been locked. It will perform sanity check, then try the fast path to free into tcache. If the attempt not success, free the chunk to arena. */ -static void +static inline void _int_free (mstate av, mchunkptr p, int have_lock) { INTERNAL_SIZE_T size; /* its size */ |