84 lines
2.2 KiB
C
84 lines
2.2 KiB
C
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#include <minix/sysutil.h>
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#include <minix/syslib.h>
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#include <minix/config.h>
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#include <minix/const.h>
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#define HIGHCOUNT 0
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#define LOWCOUNT 1
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#define START 0
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#define END 1
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void util_timer_start(util_timingdata_t *timingdata, char *name)
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{
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unsigned long h, l;
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int i;
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if(timingdata->names[0] == '\0') {
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for(i = 0; i < sizeof(timingdata->names) && *name; i++)
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timingdata->names[i] = *name++;
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timingdata->names[sizeof(timingdata->names)-1] = '\0';
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}
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if (timingdata->starttimes[HIGHCOUNT]) {
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panic(__FILE__, "restart timer?", NO_NUM);
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return;
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}
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read_tsc(&timingdata->starttimes[HIGHCOUNT],
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&timingdata->starttimes[LOWCOUNT]);
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}
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void util_timer_end(util_timingdata_t *timingdata)
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{
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unsigned long h, l, d = 0, binsize;
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int bin;
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read_tsc(&h, &l);
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if (!timingdata->starttimes[HIGHCOUNT]) {
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panic(__FILE__, "timer stopped but not started", NO_NUM);
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return;
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}
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if (timingdata->starttimes[HIGHCOUNT] == h) {
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d = (l - timingdata->starttimes[LOWCOUNT]);
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} else if (timingdata->starttimes[HIGHCOUNT] == h-1 &&
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timingdata->starttimes[LOWCOUNT] > l) {
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d = ((ULONG_MAX - timingdata->starttimes[LOWCOUNT]) + l);
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} else {
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timingdata->misses++;
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return;
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}
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timingdata->starttimes[HIGHCOUNT] = 0;
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if (!timingdata->lock_timings_range[START] ||
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d < timingdata->lock_timings_range[START] ||
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d > timingdata->lock_timings_range[END]) {
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int t;
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if (!timingdata->lock_timings_range[START] ||
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d < timingdata->lock_timings_range[START])
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timingdata->lock_timings_range[START] = d;
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if (!timingdata->lock_timings_range[END] ||
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d > timingdata->lock_timings_range[END])
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timingdata->lock_timings_range[END] = d;
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for(t = 0; t < TIMING_POINTS; t++)
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timingdata->lock_timings[t] = 0;
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timingdata->binsize =
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(timingdata->lock_timings_range[END] -
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timingdata->lock_timings_range[START])/(TIMING_POINTS+1);
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if (timingdata->binsize < 1)
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timingdata->binsize = 1;
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timingdata->resets++;
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}
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bin = (d-timingdata->lock_timings_range[START]) /
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timingdata->binsize;
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if (bin < 0 || bin >= TIMING_POINTS) {
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/* not serious, but can't happen, so shouldn't */
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panic(__FILE__, "bin out of range", bin);
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} else {
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timingdata->lock_timings[bin]++;
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timingdata->measurements++;
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}
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return;
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}
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