On 11/06/2012 07:23 AM, Michael Neuling wrote:
> + if (!found && pvr_version_is(PVR_POWER7)) {
> + /* check active counters for special buggy p7 overflow */
> + for (i = 0; i < cpuhw->n_events; ++i) {
> + event = cpuhw->event[i];
> + if (!event->hw.idx || is_limited_pmc(event->hw.idx))
> continue;
> - val = read_pmc(i + 1);
> - if (pmc_overflow(val))
> - write_pmc(i + 1, 0);
> + if (pmc_overflow_power7(val[event->hw.idx - 1])) {
I have couple of questions.
Can the buggy overflow happen on any of the available counters PMC1-PMC4 ?
Will this approach never reset an actual user defined event (with sample period
< 256) ?
Is this related to the counter or the event which it is counting ? Just
wondering if we
have to do something more than checking for the count < 256. Just a thought.
Regards
Anshuman
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