diff options
Diffstat (limited to 'src/common/timer.c')
| -rw-r--r-- | src/common/timer.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/src/common/timer.c b/src/common/timer.c index 143d2ddce..190e41eaf 100644 --- a/src/common/timer.c +++ b/src/common/timer.c @@ -100,11 +100,52 @@ char* search_timer_func_list(TimerFunc func) * Get tick time *----------------------------*/ +#if defined(ENABLE_RDTSC) +static uint64 RDTSC_BEGINTICK = 0, RDTSC_CLOCK = 0; + +static __inline uint64 _rdtsc(){ + register union{ + uint64 qw; + uint32 dw[2]; + } t; + + asm volatile("rdtsc":"=a"(t.dw[0]), "=d"(t.dw[1]) ); + + return t.qw; +} + +static void rdtsc_calibrate(){ + uint64 t1, t2; + int32 i; + + ShowStatus("Calibrating Timer Source, please wait... "); + + RDTSC_CLOCK = 0; + + for(i = 0; i < 5; i++){ + t1 = _rdtsc(); + usleep(1000000); //1000 MS + t2 = _rdtsc(); + RDTSC_CLOCK += (t2 - t1) / 1000; + } + RDTSC_CLOCK /= 5; + + RDTSC_BEGINTICK = _rdtsc(); + + ShowMessage(" done. (Frequency: %u Mhz)\n", (uint32)(RDTSC_CLOCK/1000) ); +} + +#endif + /// platform-abstracted tick retrieval static unsigned int tick(void) { #if defined(WIN32) return GetTickCount(); +#elif defined(ENABLE_RDTSC) + // + return (unsigned int)((_rdtsc() - RDTSC_BEGINTICK) / RDTSC_CLOCK); + // #elif (defined(_POSIX_TIMERS) && _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK) /* posix compliant */) || (defined(__FreeBSD_cc_version) && __FreeBSD_cc_version >= 500005 /* FreeBSD >= 5.1.0 */) struct timespec tval; clock_gettime(CLOCK_MONOTONIC, &tval); @@ -368,6 +409,10 @@ unsigned long get_uptime(void) void timer_init(void) { +#if defined(ENABLE_RDTSC) + rdtsc_calibrate(); +#endif + time(&start_time); } |