glebfm/strace
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

count: substract overhead per call

Browse Source 
* count.c (zero_ts): New variable.
(count_syscall): Calculate the spent time in the wts variable, then add
it to cc->time.
(call_summary_pers): Do not perform overhead correction.
This commit is contained in:
Eugene Syromyatnikov
2018-09-02 22:07:07 +02:00
parent 0a21612184
commit e30f3c2558
1 changed files with 8 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
count.c
View File

@ -46,6 +46,8 @@ struct call_counts {
static struct call_counts *countv[SUPPORTED_PERSONALITIES];
#define counts (countv[current_personality])
static const struct timespec zero_ts;
static struct timespec overhead;
void
@ -62,16 +64,18 @@ count_syscall(struct tcb *tcp, const struct timespec *syscall_exiting_ts)
if (syserror(tcp))
cc->errors++;
struct timespec wts;
if (count_wallclock) {
/* wall clock time spent while in syscall */
struct timespec wts;
ts_sub(&wts, syscall_exiting_ts, &tcp->etime);
ts_add(&cc->time, &cc->time, &wts);
ts_sub(&wts, &wts, &overhead);
} else {
/* system CPU time spent while in syscall */
ts_add(&cc->time, &cc->time, &tcp->dtime);
ts_sub(&wts, &tcp->dtime, &overhead);
}
ts_max(&wts, &wts, &zero_ts);
ts_add(&cc->time, &cc->time, &wts);
}
static int
@ -149,10 +153,6 @@ call_summary_pers(FILE *outf)
sorted_count[i] = i;
if (counts == NULL || counts[i].calls == 0)
continue;
ts_mul(&dtv, &overhead, counts[i].calls);
ts_sub(&counts[i].time, &counts[i].time, &dtv);
if (counts[i].time.tv_sec < 0 || counts[i].time.tv_nsec < 0)
counts[i].time.tv_sec = counts[i].time.tv_nsec = 0;
call_cum += counts[i].calls;
error_cum += counts[i].errors;
ts_add(&tv_cum, &tv_cum, &counts[i].time);