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For vmcore, calculate time relative to device creation upon time_uptime.

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Previously it used a clock from live kernel.

MFC after:	2 weeks
This commit is contained in:
Sergey Kandaurov 2013-12-25 17:11:49 +00:00
parent 1555cf04fc
commit ef6b3fcf0f
1 changed files with 11 additions and 4 deletions
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15
lib/libdevstat/devstat.c
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@ -150,7 +150,9 @@ static const char *namelist[] = {
"_devstat_version",
#define X_DEVICE_STATQ 3
"_device_statq",
#define X_END 4
#define X_TIME_UPTIME 4
"_time_uptime",
#define X_END 5
};
/*
@ -349,10 +351,10 @@ devstat_getdevs(kvm_t *kd, struct statinfo *stats)
oldnumdevs = dinfo->numdevs;
oldgeneration = dinfo->generation;
clock_gettime(CLOCK_MONOTONIC, &ts);
stats->snap_time = ts.tv_sec + ts.tv_nsec * 1e-9;
if (kd == NULL) {
clock_gettime(CLOCK_MONOTONIC, &ts);
stats->snap_time = ts.tv_sec + ts.tv_nsec * 1e-9;
/* If this is our first time through, mem_ptr will be null. */
if (dinfo->mem_ptr == NULL) {
/*
@ -433,6 +435,11 @@ devstat_getdevs(kvm_t *kd, struct statinfo *stats)
}
} else {
if (KREADNL(kd, X_TIME_UPTIME, ts.tv_sec) == -1)
return(-1);
else
stats->snap_time = ts.tv_sec;
/*
* This is of course non-atomic, but since we are working
* on a core dump, the generation is unlikely to change