sysadmin/ipxe
1
0
Fork 0
mirror of https://github.com/ipxe/ipxe synced 2026-01-01 17:34:42 +03:00
Code Issues Packages Projects Releases Wiki Activity

[profile] Add generic profiling infrastructure

Browse Source 
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2014-04-23 17:43:18 +01:00
parent d36e814b8a
commit e5f6a9be38
10 changed files with 591 additions and 76 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
src/tests/memcpy_test.c
View File

@@ -34,6 +34,9 @@ FILE_LICENCE ( GPL2_OR_LATER );
#include <ipxe/test.h>
#include <ipxe/profile.h>
/** Number of sample iterations for profiling */
#define PROFILE_COUNT 16
/* Provide global functions to allow inspection of generated code */
void memcpy_0 ( void *dest, void *src ) { memcpy ( dest, src, 0 ); }
@@ -120,10 +123,10 @@ __attribute__ (( noinline )) void * memcpy_var ( void *dest, const void *src,
*/
static void memcpy_test_speed ( unsigned int dest_offset,
unsigned int src_offset, size_t len ) {
struct profiler profiler;
uint8_t *dest;
uint8_t *src;
unsigned int i;
unsigned long elapsed;
/* Allocate blocks */
dest = malloc ( len + dest_offset );
@@ -135,21 +138,26 @@ static void memcpy_test_speed ( unsigned int dest_offset,
for ( i = 0 ; i < len ; i++ )
src[ src_offset + i ] = random();
/* Perform memcpy() */
simple_profile();
/* Check correctness of copied data */
memcpy ( ( dest + dest_offset ), ( src + src_offset ), len );
elapsed = simple_profile();
/* Check copied data */
ok ( memcmp ( ( dest + dest_offset ), ( src + src_offset ),
len ) == 0 );
/* Profile memcpy() */
memset ( &profiler, 0, sizeof ( profiler ) );
for ( i = 0 ; i < PROFILE_COUNT ; i++ ) {
profile_start ( &profiler );
memcpy ( ( dest + dest_offset ), ( src + src_offset ), len );
profile_stop ( &profiler );
}
/* Free blocks */
free ( dest );
free ( src );
DBG ( "MEMCPY copied %zd bytes (+%d => +%d) in %ld ticks\n",
len, src_offset, dest_offset, elapsed );
DBG ( "MEMCPY copied %zd bytes (+%d => +%d) in %ld +/- %ld ticks\n",
len, src_offset, dest_offset, profile_mean ( &profiler ),
profile_stddev ( &profiler ) );
}
/**