diff options
Diffstat (limited to 'libavutil/timer.h')
| -rw-r--r-- | libavutil/timer.h | 89 |
1 files changed, 70 insertions, 19 deletions
diff --git a/libavutil/timer.h b/libavutil/timer.h index cc4c5a5901..f7ab455df2 100644 --- a/libavutil/timer.h +++ b/libavutil/timer.h @@ -1,20 +1,20 @@ /* * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * 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. * - * Libav is distributed in the hope that it will be useful, + * 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 Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -26,12 +26,22 @@ #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> -#include "config.h" - #if HAVE_MACH_MACH_TIME_H #include <mach/mach_time.h> #endif @@ -42,8 +52,6 @@ # include "aarch64/timer.h" #elif ARCH_ARM # include "arm/timer.h" -#elif ARCH_BFIN -# include "bfin/timer.h" #elif ARCH_PPC # include "ppc/timer.h" #elif ARCH_X86 @@ -58,30 +66,73 @@ # endif #endif -#ifdef AV_READ_TIME -#define START_TIMER \ - uint64_t tend; \ - uint64_t tstart = AV_READ_TIME(); \ +#ifndef FF_TIMER_UNITS +# define FF_TIMER_UNITS "UNITS" +#endif -#define STOP_TIMER(id) \ - tend = AV_READ_TIME(); \ +#define TIMER_REPORT(id, tdiff) \ { \ static uint64_t tsum = 0; \ static int tcount = 0; \ static int tskip_count = 0; \ - if (tcount < 2 || \ - tend - tstart < 8 * tsum / tcount || \ - tend - tstart < 2000) { \ - tsum+= tend - tstart; \ + 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, \ - "%"PRIu64" UNITS in %s, %d runs, %d skips\n", \ + "%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) { } |