mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
158 lines
6.3 KiB
158 lines
6.3 KiB
/* |
|
* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> |
|
* |
|
* This file is part of FFmpeg. |
|
* |
|
* FFmpeg is free software; you can redistribute it and/or |
|
* modify it under the terms of the GNU Lesser General Public |
|
* License as published by the Free Software Foundation; either |
|
* version 2.1 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 |
|
* Lesser General Public License for more details. |
|
* |
|
* You should have received a copy of the GNU Lesser 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 |
|
*/ |
|
|
|
/** |
|
* @file |
|
* high precision timer, useful to profile code |
|
*/ |
|
|
|
#ifndef AVUTIL_TIMER_H |
|
#define AVUTIL_TIMER_H |
|
|
|
#include "config.h" |
|
|
|
#if CONFIG_LINUX_PERF |
|
# ifndef _GNU_SOURCE |
|
# define _GNU_SOURCE |
|
# endif |
|
# include <unistd.h> // read(3) |
|
# include <sys/ioctl.h> |
|
# include <asm/unistd.h> |
|
# include <linux/perf_event.h> |
|
#endif |
|
|
|
#include <stdlib.h> |
|
#include <stdint.h> |
|
#include <inttypes.h> |
|
|
|
#if CONFIG_MACOS_KPERF |
|
#include "macos_kperf.h" |
|
#elif HAVE_MACH_ABSOLUTE_TIME |
|
#include <mach/mach_time.h> |
|
#endif |
|
|
|
#include "common.h" |
|
#include "log.h" |
|
|
|
#if ARCH_AARCH64 |
|
# include "aarch64/timer.h" |
|
#elif ARCH_ARM |
|
# include "arm/timer.h" |
|
#elif ARCH_PPC |
|
# include "ppc/timer.h" |
|
#elif ARCH_RISCV |
|
# include "riscv/timer.h" |
|
#elif ARCH_X86 |
|
# include "x86/timer.h" |
|
#elif ARCH_LOONGARCH |
|
# include "loongarch/timer.h" |
|
#endif |
|
|
|
#if !defined(AV_READ_TIME) |
|
# if HAVE_GETHRTIME |
|
# define AV_READ_TIME gethrtime |
|
# elif HAVE_MACH_ABSOLUTE_TIME |
|
# define AV_READ_TIME mach_absolute_time |
|
# endif |
|
#endif |
|
|
|
#ifndef FF_TIMER_UNITS |
|
# define FF_TIMER_UNITS "UNITS" |
|
#endif |
|
|
|
#define TIMER_REPORT(id, tdiff) \ |
|
{ \ |
|
static uint64_t tsum = 0; \ |
|
static int tcount = 0; \ |
|
static int tskip_count = 0; \ |
|
static int thistogram[32] = {0}; \ |
|
thistogram[av_log2(tdiff)]++; \ |
|
if (tcount < 2 || \ |
|
(tdiff) < 8 * tsum / tcount || \ |
|
(tdiff) < 2000) { \ |
|
tsum += (tdiff); \ |
|
tcount++; \ |
|
} else \ |
|
tskip_count++; \ |
|
if (((tcount + tskip_count) & (tcount + tskip_count - 1)) == 0) { \ |
|
int i; \ |
|
av_log(NULL, AV_LOG_ERROR, \ |
|
"%7" PRIu64 " " FF_TIMER_UNITS " in %s,%8d runs,%7d skips",\ |
|
tsum * 10 / tcount, id, tcount, tskip_count); \ |
|
for (i = 0; i < 32; i++) \ |
|
av_log(NULL, AV_LOG_VERBOSE, " %2d", av_log2(2*thistogram[i]));\ |
|
av_log(NULL, AV_LOG_ERROR, "\n"); \ |
|
} \ |
|
} |
|
|
|
#if CONFIG_LINUX_PERF |
|
|
|
#define START_TIMER \ |
|
static int linux_perf_fd; \ |
|
uint64_t tperf; \ |
|
if (!linux_perf_fd) { \ |
|
struct perf_event_attr attr = { \ |
|
.type = PERF_TYPE_HARDWARE, \ |
|
.size = sizeof(struct perf_event_attr), \ |
|
.config = PERF_COUNT_HW_CPU_CYCLES, \ |
|
.disabled = 1, \ |
|
.exclude_kernel = 1, \ |
|
.exclude_hv = 1, \ |
|
}; \ |
|
linux_perf_fd = syscall(__NR_perf_event_open, &attr, \ |
|
0, -1, -1, 0); \ |
|
} \ |
|
if (linux_perf_fd == -1) { \ |
|
av_log(NULL, AV_LOG_ERROR, "perf_event_open failed: %s\n", \ |
|
av_err2str(AVERROR(errno))); \ |
|
} else { \ |
|
ioctl(linux_perf_fd, PERF_EVENT_IOC_RESET, 0); \ |
|
ioctl(linux_perf_fd, PERF_EVENT_IOC_ENABLE, 0); \ |
|
} |
|
|
|
#define STOP_TIMER(id) \ |
|
ioctl(linux_perf_fd, PERF_EVENT_IOC_DISABLE, 0); \ |
|
read(linux_perf_fd, &tperf, sizeof(tperf)); \ |
|
TIMER_REPORT(id, tperf) |
|
|
|
#elif CONFIG_MACOS_KPERF |
|
|
|
#define START_TIMER \ |
|
uint64_t tperf; \ |
|
ff_kperf_init(); \ |
|
tperf = ff_kperf_cycles(); |
|
|
|
#define STOP_TIMER(id) \ |
|
TIMER_REPORT(id, ff_kperf_cycles() - tperf); |
|
|
|
#elif defined(AV_READ_TIME) |
|
#define START_TIMER \ |
|
uint64_t tend; \ |
|
uint64_t tstart = AV_READ_TIME(); \ |
|
|
|
#define STOP_TIMER(id) \ |
|
tend = AV_READ_TIME(); \ |
|
TIMER_REPORT(id, tend - tstart) |
|
#else |
|
#define START_TIMER |
|
#define STOP_TIMER(id) { } |
|
#endif |
|
|
|
#endif /* AVUTIL_TIMER_H */
|
|
|