I added a couple of static probes to Firefox to measure actual work
done. I could have used a pid$target probe with a function name but
work is done within an if statement, which is where I placed the
static probes.
I'm wondering about my use, though. Is the following significantly
more efficient than pid$target::FunName:entry and return?
I heard somewhere that $target does not need to be used with static
probes but the probes don't show up unless Firefox is running and then
only as mozillaNNNNN, i.e. mozilla$target.
Thanks, Joel
---
BEGIN
{
self->ts = 0;
self->vts = 0;
}
mozilla$target:::process-xul-reflow-entry
{
self->ts = timestamp;
self->vts = vtimestamp;
self->roots = arg0;
}
mozilla$target:::process-xul-reflow-return
/self->ts/
{
this->ts = timestamp - self->ts;
this->vts = vtimestamp - self->vts;
printf("\n");
printf("# roots: %u\n", self->roots);
printf("elapsed: %u.%06ums\n", this->ts / 1000000, this->ts %
1000000);
printf("cpu : %u.%06ums\n", this->vts / 1000000, this->vts %
1000000);
@tsint = sum(this->ts / 1000000);
@tsfrac = sum(this->ts % 1000000);
@vtsint = sum(this->vts / 1000000);
@vtsfrac = sum(this->vts % 1000000);
@n = count();
self->ts = 0;
self->vts = 0;
ustack();
}
END
{
t = timestamp;
printf("\n\n----------------------\n");
printa("elapsed: %...@u.%@06ums\n", @tsint, @tsfrac);
printa("cpu : %...@u.%@06ums\n", @vtsint, @vtsfrac);
printa("count : %...@u times\n", @n);
}
---
fastest mac firefox!
http://wagerlabs.com
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