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malloc: Avoid func call for tcache quick path in free()

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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>
This commit is contained in:
Wangyang Guo 2024-11-26 15:33:38 +08:00 committed by H.J. Lu
parent 4836a9af89
commit c69e8cccaf
1 changed files with 1 additions and 1 deletions
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malloc/malloc.c
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@ -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 */