view src/timertool.c @ 1401:2fc1f54a1a3b

Mainly fix the clone_from_subtree to update the children of the parent node. We need to clearify all related codes in the future to make the logic more clear.
author wycc
date Sun, 03 Apr 2011 18:12:42 +0800
parents 586e50f82c1f
children
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line source

// -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 4; -*-
// vim: sw=4:ts=8:sts=4
#include <stdio.h>
#include <sys/time.h>
#ifdef __FreeBSD__
#include <machine/cpufunc.h>
#include <sys/types.h>
#include <sys/sysctl.h>
#endif
#include "mb_timer.h"


#ifdef __FreeBSD__
void get_now(mb_timeval_t *tmo) {
    struct timeval tv;
    static uint64_t cpufreq;
    static uint64_t diff;
    static mb_timeval_t tm = {0, 0};
    static uint64_t last_ts;
    mb_timeval_t diff_tm;
    uint64_t ts, udiff, sdiff;
    size_t sysctl_sz;
    int r;

    if(MB_TIMEVAL_SEC(&tm) == 0) {
	sysctl_sz = sizeof(uint64_t);
	r = sysctlbyname("kern.timecounter.tc.TSC.frequency",
			 &cpufreq, &sysctl_sz,
			 NULL, 0);
	if(r == -1) {
	    perror("sysctl");
	    return;
	}

	gettimeofday(&tv, NULL);
	last_ts = rdtsc();

	MB_TIMEVAL_SET(tmo, tv.tv_sec, tv.tv_usec);
	MB_TIMEVAL_CP(&tm, tmo);
	diff = 0;
    } else {
	ts = rdtsc();
	diff += ts - last_ts;
	sdiff = diff / cpufreq;
	udiff = (diff % cpufreq) * 1000000 / cpufreq;

	MB_TIMEVAL_SET(&diff_tm, sdiff, udiff);
	MB_TIMEVAL_CP(tmo, &tm);
	MB_TIMEVAL_ADD(tmo, &diff_tm);

	MB_TIMEVAL_SET(&diff_tm, sdiff, 0);
	MB_TIMEVAL_ADD(&tm, &diff_tm);

	diff %= cpufreq;
	last_ts = ts;
    }
}
#else /* __FreeBSD__ */
void get_now(mb_timeval_t *tmo) {
    struct timeval tv;

    gettimeofday(&tv, NULL);
    MB_TIMEVAL_SET(tmo, tv.tv_sec, tv.tv_usec);
}
#endif /* __FreeBSD__ */