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Diffstat (limited to 'media/ffvpx/libavutil/timer.h')
| -rw-r--r-- | media/ffvpx/libavutil/timer.h | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/media/ffvpx/libavutil/timer.h b/media/ffvpx/libavutil/timer.h new file mode 100644 index 0000000000..0bb353cfce --- /dev/null +++ b/media/ffvpx/libavutil/timer.h @@ -0,0 +1,141 @@ +/* + * 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 HAVE_MACH_ABSOLUTE_TIME +#include <mach/mach_time.h> +#endif + +#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_X86 +# include "x86/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 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 */ |