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Code Issues Releases Activity

lavu/kperf: use ff_thread_once()

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Signed-off-by: J. Dekker <jdek@itanimul.li>
This commit is contained in:
J. Dekker
2021-07-21 16:21:34 +02:00
parent f614390ecc
commit c866a099b2
4 changed files with 22 additions and 58 deletions
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65
libavutil/macos_kperf.c
View File

@@ -16,7 +16,10 @@
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "avassert.h"
#include "macos_kperf.h"
#include "thread.h"
#include <stdio.h>
#include <stdlib.h>
#include <dlfcn.h>
@@ -68,69 +71,35 @@ KPERF_LIST
#define CONFIG_COUNT 8
#define KPC_MASK (KPC_CLASS_CONFIGURABLE_MASK | KPC_CLASS_FIXED_MASK)
static int ff_kperf_was_init = 0;
int ff_kperf_init()
static void kperf_init(void)
{
uint64_t config[COUNTERS_COUNT] = {0};
void *kperf = NULL;
if (ff_kperf_was_init)
return 0;
av_assert0(kperf = dlopen("/System/Library/PrivateFrameworks/kperf.framework/Versions/A/kperf", RTLD_LAZY));
kperf = dlopen("/System/Library/PrivateFrameworks/kperf.framework/Versions/A/kperf", RTLD_LAZY);
if (!kperf) {
fprintf(stderr, "kperf: kperf = %p\n", kperf);
return -1;
}
#define F(ret, name, ...) \
name = (name##proc *)(dlsym(kperf, #name)); \
if (!name) { \
fprintf(stderr, "kperf: %s = %p\n", #name, (void *)name); \
return -1; \
}
#define F(ret, name, ...) av_assert0(name = (name##proc *)(dlsym(kperf, #name)));
KPERF_LIST
#undef F
if (kpc_get_counter_count(KPC_MASK) != COUNTERS_COUNT) {
fprintf(stderr, "kperf: wrong fixed counters count\n");
return -1;
}
if (kpc_get_config_count(KPC_MASK) != CONFIG_COUNT) {
fprintf(stderr, "kperf: wrong fixed config count\n");
return -1;
}
av_assert0(kpc_get_counter_count(KPC_MASK) == COUNTERS_COUNT);
av_assert0(kpc_get_config_count(KPC_MASK) == CONFIG_COUNT);
config[0] = CPMU_CORE_CYCLE | CFGWORD_EL0A64EN_MASK;
// config[3] = CPMU_INST_BRANCH | CFGWORD_EL0A64EN_MASK;
// config[4] = CPMU_SYNC_BR_ANY_MISP | CFGWORD_EL0A64EN_MASK;
// config[5] = CPMU_INST_A64 | CFGWORD_EL0A64EN_MASK;
if (kpc_set_config(KPC_MASK, config)) {
fprintf(stderr, "kperf: kpc_set_config failed\n");
return -1;
}
av_assert0(kpc_set_config(KPC_MASK, config) == 0 || !"the kperf API needs to be run as root");
av_assert0(kpc_force_all_ctrs_set(1) == 0);
av_assert0(kpc_set_counting(KPC_MASK) == 0);
av_assert0(kpc_set_thread_counting(KPC_MASK) == 0);
}
if (kpc_force_all_ctrs_set(1)) {
fprintf(stderr, "kperf: kpc_force_all_ctrs_set failed\n");
return -1;
}
if (kpc_set_counting(KPC_MASK)) {
fprintf(stderr, "kperf: kpc_set_counting failed\n");
return -1;
}
if (kpc_set_thread_counting(KPC_MASK)) {
fprintf(stderr, "kperf: kpc_set_thread_counting failed\n");
return -1;
}
ff_kperf_was_init = 1;
return 0;
void ff_kperf_init(void)
{
static AVOnce init_static_once = AV_ONCE_INIT;
ff_thread_once(&init_static_once, kperf_init);
}
uint64_t ff_kperf_cycles()

2
libavutil/macos_kperf.h
View File

@@ -21,7 +21,7 @@
#include <stdint.h>
int ff_kperf_init(void);
void ff_kperf_init(void);
uint64_t ff_kperf_cycles(void);
#endif /* AVUTIL_MACOS_KPERF_H */

7
libavutil/timer.h
View File

@@ -131,12 +131,11 @@
#define START_TIMER \
uint64_t tperf; \
if (ff_kperf_init()) \
av_log(NULL, AV_LOG_ERROR, "ff_kperf_init() failed\n"); \
tperf = kperf_cycles();
ff_kperf_init(); \
tperf = ff_kperf_cycles();
#define STOP_TIMER(id) \
TIMER_REPORT(id, kperf_cycles() - tperf);
TIMER_REPORT(id, ff_kperf_cycles() - tperf);
#elif defined(AV_READ_TIME)
#define START_TIMER \

6
tests/checkasm/checkasm.c
View File

@@ -641,11 +641,7 @@ static int bench_init_linux(void)
#elif CONFIG_MACOS_KPERF
static int bench_init_kperf(void)
{
if (ff_kperf_init()) {
fprintf(stderr, "checkasm must be run as root to use kperf on macOS\n");
return -1;
}
ff_kperf_init();
return 0;
}
#else