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profile: better time breakdown and exclusion of idle cycles

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This commit is contained in:
Balazs Gerofi
2017-07-20 17:36:34 +09:00
parent 64c2e437c6
commit 992a292c08
5 changed files with 160 additions and 30 deletions
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14
kernel/futex.c
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@@ -788,6 +788,15 @@ static int futex_wait(uint32_t __user *uaddr, int fshared,
if (!bitset)
return -EINVAL;
#ifdef PROFILE_ENABLE
if (cpu_local_var(current)->profile &&
cpu_local_var(current)->profile_start_ts) {
cpu_local_var(current)->profile_elapsed_ts +=
(rdtsc() - cpu_local_var(current)->profile_start_ts);
cpu_local_var(current)->profile_start_ts = 0;
}
#endif
q.bitset = bitset;
q.requeue_pi_key = NULL;
@@ -822,6 +831,11 @@ retry:
out_put_key:
put_futex_key(fshared, &q.key);
out:
#ifdef PROFILE_ENABLE
if (cpu_local_var(current)->profile) {
cpu_local_var(current)->profile_start_ts = rdtsc();
}
#endif
return ret;
}