Author: mav
Date: Tue Feb 26 13:59:39 2013
New Revision: 247318
URL: http://svnweb.freebsd.org/changeset/base/247318
Log:
Change the way how software PMC updates counters.
This at least fixes -n option of pmcstat.
Reviewed by: fabient
Modified:
head/sys/dev/hwpmc/hwpmc_soft.c
Modified: head/sys/dev/hwpmc/hwpmc_soft.c
==============================================================================
--- head/sys/dev/hwpmc/hwpmc_soft.c Tue Feb 26 10:24:49 2013
(r247317)
+++ head/sys/dev/hwpmc/hwpmc_soft.c Tue Feb 26 13:59:39 2013
(r247318)
@@ -408,8 +408,11 @@ pmc_soft_intr(struct pmckern_soft *ks)
}
processed = 1;
- pc->soft_values[ri]++;
if (PMC_IS_SAMPLING_MODE(PMC_TO_MODE(pm))) {
+ if ((pc->soft_values[ri]--) <= 0)
+ pc->soft_values[ri] += pm->pm_sc.pm_reloadcount;
+ else
+ continue;
user_mode = TRAPF_USERMODE(ks->pm_tf);
error = pmc_process_interrupt(ks->pm_cpu, PMC_SR, pm,
ks->pm_tf, user_mode);
@@ -424,7 +427,8 @@ pmc_soft_intr(struct pmckern_soft *ks)
*/
curthread->td_flags |= TDF_ASTPENDING;
}
- }
+ } else
+ pc->soft_values[ri]++;
}
atomic_add_int(processed ? &pmc_stats.pm_intr_processed :
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