1 /*
2 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 /**
22 * @file
23 * high precision timer, useful to profile code
24 */
25
26 #ifndef AVUTIL_TIMER_H
27 #define AVUTIL_TIMER_H
28
29 #include <stdlib.h>
30 #include <stdint.h>
31 #include <inttypes.h>
32
34
35 #if HAVE_MACH_MACH_TIME_H
36 #include <mach/mach_time.h>
37 #endif
38
40
41 #if ARCH_AARCH64
43 #elif ARCH_ARM
45 #elif ARCH_PPC
47 #elif ARCH_X86
49 #endif
50
51 #if !defined(AV_READ_TIME)
52 # if HAVE_GETHRTIME
53 # define AV_READ_TIME gethrtime
54 # elif HAVE_MACH_ABSOLUTE_TIME
55 # define AV_READ_TIME mach_absolute_time
56 # endif
57 #endif
58
59 #ifndef FF_TIMER_UNITS
60 # define FF_TIMER_UNITS "UNITS"
61 #endif
62
63 #ifdef AV_READ_TIME
64 #define START_TIMER \
65 uint64_t tend; \
66 uint64_t tstart = AV_READ_TIME(); \
67
68 #define STOP_TIMER(id) \
69 tend = AV_READ_TIME(); \
70 { \
71 static uint64_t tsum = 0; \
72 static int tcount = 0; \
73 static int tskip_count = 0; \
74 static int thistogram[32] = {0}; \
75 thistogram[av_log2(tend - tstart)]++; \
76 if (tcount < 2 || \
77 tend - tstart < 8 * tsum / tcount || \
78 tend - tstart < 2000) { \
79 tsum+= tend - tstart; \
80 tcount++; \
81 } else \
82 tskip_count++; \
83 if (((tcount + tskip_count) & (tcount + tskip_count - 1)) == 0) { \
84 int i; \
85 av_log(NULL, AV_LOG_ERROR, \
86 "%7"PRIu64" " FF_TIMER_UNITS " in %s,%8d runs,%7d skips", \
87 tsum * 10 / tcount, id, tcount, tskip_count); \
88 for (i = 0; i < 32; i++) \
89 av_log(NULL, AV_LOG_VERBOSE, " %2d", av_log2(2*thistogram[i]));\
90 av_log(NULL, AV_LOG_ERROR, "\n"); \
91 } \
92 }
93 #else
95 #define STOP_TIMER(id) { }
96 #endif
97
98 #endif /* AVUTIL_TIMER_H */