Mercurial > MadButterfly
annotate src/timertool.c @ 893:cad38ddb1253
Backed out changeset 23dffb564ace
| author | wycc |
|---|---|
| date | Mon, 27 Sep 2010 23:00:51 +0800 |
| parents | 586e50f82c1f |
| children |
| rev | line source |
|---|---|
|
822
586e50f82c1f
Unify coding style tag for emacs and vim.
Shih-Yuan Lee (FourDollars) <fourdollars@gmail.com>
parents:
186
diff
changeset
|
1 // -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 4; -*- |
|
586e50f82c1f
Unify coding style tag for emacs and vim.
Shih-Yuan Lee (FourDollars) <fourdollars@gmail.com>
parents:
186
diff
changeset
|
2 // vim: sw=4:ts=8:sts=4 |
|
92
3f619ae03678
Improve calcuator example program.
Thinker K.F. Li <thinker@branda.to>
parents:
78
diff
changeset
|
3 #include <stdio.h> |
| 77 | 4 #include <sys/time.h> |
| 5 #ifdef __FreeBSD__ | |
| 6 #include <machine/cpufunc.h> | |
| 7 #include <sys/types.h> | |
| 8 #include <sys/sysctl.h> | |
| 9 #endif | |
|
186
530bb7728546
Move header files to $(top_srcdir)/include/ and prefixed with 'mb_'.
Thinker K.F. Li <thinker@branda.to>
parents:
185
diff
changeset
|
10 #include "mb_timer.h" |
| 77 | 11 |
| 12 | |
| 13 #ifdef __FreeBSD__ | |
| 14 void get_now(mb_timeval_t *tmo) { | |
| 15 struct timeval tv; | |
| 16 static uint64_t cpufreq; | |
| 120 | 17 static uint64_t diff; |
| 77 | 18 static mb_timeval_t tm = {0, 0}; |
| 19 static uint64_t last_ts; | |
| 20 mb_timeval_t diff_tm; | |
| 120 | 21 uint64_t ts, udiff, sdiff; |
| 77 | 22 size_t sysctl_sz; |
| 78 | 23 int r; |
| 77 | 24 |
| 25 if(MB_TIMEVAL_SEC(&tm) == 0) { | |
| 26 sysctl_sz = sizeof(uint64_t); | |
| 78 | 27 r = sysctlbyname("kern.timecounter.tc.TSC.frequency", |
| 28 &cpufreq, &sysctl_sz, | |
| 29 NULL, 0); | |
| 30 if(r == -1) { | |
| 31 perror("sysctl"); | |
| 32 return; | |
| 33 } | |
| 77 | 34 |
| 35 gettimeofday(&tv, NULL); | |
| 36 last_ts = rdtsc(); | |
| 37 | |
| 38 MB_TIMEVAL_SET(tmo, tv.tv_sec, tv.tv_usec); | |
| 39 MB_TIMEVAL_CP(&tm, tmo); | |
| 40 diff = 0; | |
| 41 } else { | |
| 42 ts = rdtsc(); | |
| 120 | 43 diff += ts - last_ts; |
| 77 | 44 sdiff = diff / cpufreq; |
| 45 udiff = (diff % cpufreq) * 1000000 / cpufreq; | |
| 46 | |
| 47 MB_TIMEVAL_SET(&diff_tm, sdiff, udiff); | |
| 48 MB_TIMEVAL_CP(tmo, &tm); | |
| 49 MB_TIMEVAL_ADD(tmo, &diff_tm); | |
| 50 | |
| 51 MB_TIMEVAL_SET(&diff_tm, sdiff, 0); | |
| 52 MB_TIMEVAL_ADD(&tm, &diff_tm); | |
| 53 | |
| 120 | 54 diff %= cpufreq; |
| 55 last_ts = ts; | |
| 77 | 56 } |
| 57 } | |
| 58 #else /* __FreeBSD__ */ | |
| 59 void get_now(mb_timeval_t *tmo) { | |
| 60 struct timeval tv; | |
| 61 | |
| 62 gettimeofday(&tv, NULL); | |
| 63 MB_TIMEVAL_SET(tmo, tv.tv_sec, tv.tv_usec); | |
| 64 } | |
| 65 #endif /* __FreeBSD__ */ | |
| 66 |