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lavu/checkasm: add (private) kperf timing for macOS 

Signed-off-by: J. Dekker <jdek@itanimul.li>
This commit is contained in:
J. Dekker 2021-07-20 19:09:22 +02:00
parent 4f49fa6abe
commit 9a727235fd
7 changed files with 201 additions and 4 deletions
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2
configure vendored
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@ -488,6 +488,7 @@ Developer options (useful when working on FFmpeg itself):
--ignore-tests=TESTS comma-separated list (without "fate-" prefix
in the name) of tests whose result is ignored
--enable-linux-perf enable Linux Performance Monitor API
--enable-macos-kperf enable macOS kperf (private) API
--disable-large-tests disable tests that use a large amount of memory
--disable-ptx-compression don't compress CUDA PTX code even when possible
@ -1977,6 +1978,7 @@ CONFIG_LIST="
fontconfig
large_tests
linux_perf
macos_kperf
memory_poisoning
neon_clobber_test
ossfuzz

1
libavutil/Makefile
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@ -181,6 +181,7 @@ OBJS-$(CONFIG_D3D11VA) += hwcontext_d3d11va.o
OBJS-$(CONFIG_DXVA2) += hwcontext_dxva2.o
OBJS-$(CONFIG_LIBDRM) += hwcontext_drm.o
OBJS-$(CONFIG_LZO) += lzo.o
OBJS-$(CONFIG_MACOS_KPERF) += macos_kperf.o
OBJS-$(CONFIG_MEDIACODEC) += hwcontext_mediacodec.o
OBJS-$(CONFIG_OPENCL) += hwcontext_opencl.o
OBJS-$(CONFIG_QSV) += hwcontext_qsv.o

144
libavutil/macos_kperf.c Normal file
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@ -0,0 +1,144 @@
/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with FFmpeg; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "macos_kperf.h"
#include <stdio.h>
#include <stdlib.h>
#include <dlfcn.h>
#define KPERF_LIST \
F(int, kpc_get_counting, void) \
F(int, kpc_force_all_ctrs_set, int) \
F(int, kpc_set_counting, uint32_t) \
F(int, kpc_set_thread_counting, uint32_t) \
F(int, kpc_set_config, uint32_t, void *) \
F(int, kpc_get_config, uint32_t, void *) \
F(int, kpc_set_period, uint32_t, void *) \
F(int, kpc_get_period, uint32_t, void *) \
F(uint32_t, kpc_get_counter_count, uint32_t) \
F(uint32_t, kpc_get_config_count, uint32_t) \
F(int, kperf_sample_get, int *) \
F(int, kpc_get_thread_counters, int, unsigned int, void *)
#define F(ret, name, ...) \
typedef ret name##proc(__VA_ARGS__); \
static name##proc *name = NULL;
KPERF_LIST
#undef F
#define CFGWORD_EL0A32EN_MASK (0x10000)
#define CFGWORD_EL0A64EN_MASK (0x20000)
#define CFGWORD_EL1EN_MASK (0x40000)
#define CFGWORD_EL3EN_MASK (0x80000)
#define CFGWORD_ALLMODES_MASK (0xf0000)
#define CPMU_NONE 0
#define CPMU_CORE_CYCLE 0x02
#define CPMU_INST_A64 0x8c
#define CPMU_INST_BRANCH 0x8d
#define CPMU_SYNC_DC_LOAD_MISS 0xbf
#define CPMU_SYNC_DC_STORE_MISS 0xc0
#define CPMU_SYNC_DTLB_MISS 0xc1
#define CPMU_SYNC_ST_HIT_YNGR_LD 0xc4
#define CPMU_SYNC_BR_ANY_MISP 0xcb
#define CPMU_FED_IC_MISS_DEM 0xd3
#define CPMU_FED_ITLB_MISS 0xd4
#define KPC_CLASS_FIXED_MASK (1 << 0)
#define KPC_CLASS_CONFIGURABLE_MASK (1 << 1)
#define KPC_CLASS_POWER_MASK (1 << 2)
#define KPC_CLASS_RAWPMU_MASK (1 << 3)
#define COUNTERS_COUNT 10
#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()
{
uint64_t config[COUNTERS_COUNT] = {0};
void *kperf = NULL;
if (ff_kperf_was_init)
return 0;
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; \
}
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;
}
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;
}
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;
}
uint64_t ff_kperf_cycles()
{
uint64_t counters[COUNTERS_COUNT];
if (kpc_get_thread_counters(0, COUNTERS_COUNT, counters)) {
return -1;
}
return counters[0];
}

22
libavutil/macos_kperf.h Normal file
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@ -0,0 +1,22 @@
/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with FFmpeg; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdint.h>
int ff_kperf_init(void);
uint64_t ff_kperf_cycles(void);

15
libavutil/timer.h
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@ -42,7 +42,9 @@
#include <stdint.h>
#include <inttypes.h>
#if HAVE_MACH_ABSOLUTE_TIME
#if CONFIG_MACOS_KPERF
#include "macos_kperf.h"
#elif HAVE_MACH_ABSOLUTE_TIME
#include <mach/mach_time.h>
#endif
@ -125,6 +127,17 @@
read(linux_perf_fd, &tperf, sizeof(tperf)); \
TIMER_REPORT(id, tperf)
#elif CONFIG_MACOS_KPERF
#define START_TIMER \
uint64_t tperf; \
if (ff_kperf_init()) \
av_log(NULL, AV_LOG_ERROR, "ff_kperf_init() failed\n"); \
tperf = kperf_cycles();
#define STOP_TIMER(id) \
TIMER_REPORT(id, kperf_cycles() - tperf);
#elif defined(AV_READ_TIME)
#define START_TIMER \
uint64_t tend; \

14
tests/checkasm/checkasm.c
View File

@ -638,9 +638,17 @@ static int bench_init_linux(void)
}
return 0;
}
#endif
#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;
}
#if !CONFIG_LINUX_PERF
return 0;
}
#else
static int bench_init_ffmpeg(void)
{
#ifdef AV_READ_TIME
@ -657,6 +665,8 @@ static int bench_init(void)
{
#if CONFIG_LINUX_PERF
int ret = bench_init_linux();
#elif CONFIG_MACOS_KPERF
int ret = bench_init_kperf();
#else
int ret = bench_init_ffmpeg();
#endif

7
tests/checkasm/checkasm.h
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@ -31,6 +31,8 @@
#include <sys/ioctl.h>
#include <asm/unistd.h>
#include <linux/perf_event.h>
#elif CONFIG_MACOS_KPERF
#include "libavutil/macos_kperf.h"
#endif
#include "libavutil/avstring.h"
@ -225,7 +227,7 @@ typedef struct CheckasmPerf {
int iterations;
} CheckasmPerf;
#if defined(AV_READ_TIME) || CONFIG_LINUX_PERF
#if defined(AV_READ_TIME) || CONFIG_LINUX_PERF || CONFIG_MACOS_KPERF
#if CONFIG_LINUX_PERF
#define PERF_START(t) do { \
@ -236,6 +238,9 @@ typedef struct CheckasmPerf {
ioctl(sysfd, PERF_EVENT_IOC_DISABLE, 0); \
read(sysfd, &t, sizeof(t)); \
} while (0)
#elif CONFIG_MACOS_KPERF
#define PERF_START(t) t = ff_kperf_cycles()
#define PERF_STOP(t) t = ff_kperf_cycles() - t
#else
#define PERF_START(t) t = AV_READ_TIME()
#define PERF_STOP(t) t = AV_READ_TIME() - t