Merge pull request #3794 from bartoldeman/benchmark-align-malloc
Benchmarks: align malloc'ed buffers.
This commit is contained in:
commit
8c10f0abba
|
@ -74,6 +74,24 @@ static void *huge_malloc(BLASLONG size){
|
|||
|
||||
#endif
|
||||
|
||||
/* Benchmarks should allocate with cacheline (often 64 bytes) alignment
|
||||
to avoid unreliable results. This technique, storing the allocated
|
||||
pointer value just before the aligned memory, doesn't require
|
||||
C11's aligned_alloc for compatibility with older compilers. */
|
||||
static void *aligned_alloc_cacheline(size_t n)
|
||||
{
|
||||
void *p = malloc((size_t)(void *) + n + L1_DATA_LINESIZE - 1);
|
||||
if (p) {
|
||||
void **newp = (void **)
|
||||
(((uintptr_t)p + L1_DATA_LINESIZE) & (uintptr_t)-L1_DATA_LINESIZE);
|
||||
newp[-1] = p;
|
||||
p = newp;
|
||||
}
|
||||
return p;
|
||||
}
|
||||
#define malloc aligned_alloc_cacheline
|
||||
#define free(p) free((p) ? ((void **)(p))[-1] : (p))
|
||||
|
||||
#if defined(__WIN32__) || defined(__WIN64__) || !defined(_POSIX_TIMERS)
|
||||
struct timeval start, stop;
|
||||
#elif defined(__APPLE__)
|
||||
|
|
Loading…
Reference in New Issue