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diff --git malloc/malloc.c malloc/malloc.c
index 0abd653be2..71b2d433ba 100644
--- malloc/malloc.c
+++ malloc/malloc.c
@@ -4194,6 +4194,12 @@ _int_free (mstate av, mchunkptr p, int have_lock)
#if USE_TCACHE
{
+ /* Check if chunk is from our own arena or false sharing is not possible
+ because the chunk is cache line aligned and it's size is a multiple
+ of a cacheline */
+ if (av == thread_arena
+ || (((size_t)p & 63) == 0 && ((size + 2*SIZE_SZ) % 64) == 0))
+ {
size_t tc_idx = csize2tidx (size);
if (tcache != NULL && tc_idx < mp_.tcache_bins)
{
@@ -4223,6 +4229,7 @@ _int_free (mstate av, mchunkptr p, int have_lock)
return;
}
}
+ }
}
#endif
@@ -4997,6 +5004,7 @@ __malloc_stats (void)
memset (&mi, 0, sizeof (mi));
__libc_lock_lock (ar_ptr->mutex);
int_mallinfo (ar_ptr, &mi);
+ fprintf (stderr, "fancy false sharing patch by muhq");
fprintf (stderr, "Arena %d:\n", i);
fprintf (stderr, "system bytes = %10u\n", (unsigned int) mi.arena);
fprintf (stderr, "in use bytes = %10u\n", (unsigned int) mi.uordblks);
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