diff options
| author | Mitchell Horne <mhorne@FreeBSD.org> | 2021-04-21 20:28:12 +0000 |
|---|---|---|
| committer | Mitchell Horne <mhorne@FreeBSD.org> | 2021-04-29 13:19:20 +0000 |
| commit | 112e30301846d8fede4679a3f95e18820d721bbd (patch) | |
| tree | adf2f84abb0b1b61ead3c6f1320a2db3968a56fe /usr.sbin/pmcstat | |
| parent | e0ae2b39aa3e51b0e3f7b9661192cba8f06e7b10 (diff) | |
| download | src-112e30301846d8fede4679a3f95e18820d721bbd.tar.gz src-112e30301846d8fede4679a3f95e18820d721bbd.zip | |
pmcstat: set initial counter value to zero
For an infrequent event, pmcstat may report (u_long)-1 for CPUs where
the counter was never incremented. Just set this to zero, instead.
ev->ev_count is passed as the 'count' argument to pmc_allocate(3), but
this wasn't always the case.
Reviewed by: gnn
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D29887
(cherry picked from commit edcf9e59c356525632dd2546d72916aeca609a2b)
Diffstat (limited to 'usr.sbin/pmcstat')
| -rw-r--r-- | usr.sbin/pmcstat/pmcstat.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/usr.sbin/pmcstat/pmcstat.c b/usr.sbin/pmcstat/pmcstat.c index 688a98843652..b7f6c5e0f63e 100644 --- a/usr.sbin/pmcstat/pmcstat.c +++ b/usr.sbin/pmcstat/pmcstat.c @@ -675,7 +675,7 @@ main(int argc, char **argv) if (option == 'S' || option == 'P') ev->ev_count = current_sampling_count ? current_sampling_count : pmc_pmu_sample_rate_get(ev->ev_spec); else - ev->ev_count = -1; + ev->ev_count = 0; if (option == 'S' || option == 's') ev->ev_cpu = CPU_FFS(&cpumask) - 1; |