sanchayanmaity/minix
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

timing library from kernel into library

Browse source
This commit is contained in:
Ben Gras 2009-01-09 16:39:31 +00:00
parent 7740d0379c
commit ad03a650e6
2 changed files with 84 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
lib/sysutil/Makefile.in
View file

@ -25,6 +25,7 @@ libsys_FILES=" \
ser_putc.c \
stacktrace.c \
sys_hz.c \
timing.c \
profile_extern.c \
profile.c"

83
lib/sysutil/timing.c Normal file
View file

@ -0,0 +1,83 @@
#include <minix/sysutil.h>
#include <minix/syslib.h>
#include <minix/config.h>
#include <minix/const.h>
#define HIGHCOUNT 0
#define LOWCOUNT 1
#define START 0
#define END 1
void util_timer_start(util_timingdata_t *timingdata, char *name)
{
unsigned long h, l;
int i;
if(timingdata->names[0] == '\0') {
for(i = 0; i < sizeof(timingdata->names) && *name; i++)
timingdata->names[i] = *name++;
timingdata->names[sizeof(timingdata->names)-1] = '\0';
}
if (timingdata->starttimes[HIGHCOUNT]) {
panic(__FILE__, "restart timer?", NO_NUM);
return;
}
read_tsc(&timingdata->starttimes[HIGHCOUNT],
&timingdata->starttimes[LOWCOUNT]);
}
void util_timer_end(util_timingdata_t *timingdata)
{
unsigned long h, l, d = 0, binsize;
int bin;
read_tsc(&h, &l);
if (!timingdata->starttimes[HIGHCOUNT]) {
panic(__FILE__, "timer stopped but not started", NO_NUM);
return;
}
if (timingdata->starttimes[HIGHCOUNT] == h) {
d = (l - timingdata->starttimes[LOWCOUNT]);
} else if (timingdata->starttimes[HIGHCOUNT] == h-1 &&
timingdata->starttimes[LOWCOUNT] > l) {
d = ((ULONG_MAX - timingdata->starttimes[LOWCOUNT]) + l);
} else {
timingdata->misses++;
return;
}
timingdata->starttimes[HIGHCOUNT] = 0;
if (!timingdata->lock_timings_range[START] ||
d < timingdata->lock_timings_range[START] ||
d > timingdata->lock_timings_range[END]) {
int t;
if (!timingdata->lock_timings_range[START] ||
d < timingdata->lock_timings_range[START])
timingdata->lock_timings_range[START] = d;
if (!timingdata->lock_timings_range[END] ||
d > timingdata->lock_timings_range[END])
timingdata->lock_timings_range[END] = d;
for(t = 0; t < TIMING_POINTS; t++)
timingdata->lock_timings[t] = 0;
timingdata->binsize =
(timingdata->lock_timings_range[END] -
timingdata->lock_timings_range[START])/(TIMING_POINTS+1);
if (timingdata->binsize < 1)
timingdata->binsize = 1;
timingdata->resets++;
}
bin = (d-timingdata->lock_timings_range[START]) /
timingdata->binsize;
if (bin < 0 || bin >= TIMING_POINTS) {
/* not serious, but can't happen, so shouldn't */
panic(__FILE__, "bin out of range", bin);
} else {
timingdata->lock_timings[bin]++;
timingdata->measurements++;
}
return;
}