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| author | gnn <gnn@FreeBSD.org> | 2012-03-06 17:17:03 +0000 |
|---|---|---|
| committer | gnn <gnn@FreeBSD.org> | 2012-03-06 17:17:03 +0000 |
| commit | 6ce0b47b5ab938df003706c90f9e0de436e36132 (patch) | |
| tree | d690e6a6794ad0663df3268b8fe35cc87259d21c | |
| parent | 45db1d7f59d9cb7fae12cc9d0f786dec2b7a7a08 (diff) | |
| download | FreeBSD-src-6ce0b47b5ab938df003706c90f9e0de436e36132.zip FreeBSD-src-6ce0b47b5ab938df003706c90f9e0de436e36132.tar.gz | |
Properly mask off bits that are not supported in the IAP counters.
This fixes a bug where users would see massively large counts, near
to 2**64 -1, due to the bits not being cleared.
MFC after: 3 weeks
| -rw-r--r-- | sys/dev/hwpmc/hwpmc_core.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/dev/hwpmc/hwpmc_core.c b/sys/dev/hwpmc/hwpmc_core.c index a3e3cb9..7bef548 100644 --- a/sys/dev/hwpmc/hwpmc_core.c +++ b/sys/dev/hwpmc/hwpmc_core.c @@ -2021,7 +2021,7 @@ iap_read_pmc(int cpu, int ri, pmc_value_t *v) if (PMC_IS_SAMPLING_MODE(PMC_TO_MODE(pm))) *v = iap_perfctr_value_to_reload_count(tmp); else - *v = tmp; + *v = tmp & ((1ULL << core_iap_width) - 1); PMCDBG(MDP,REA,1, "iap-read cpu=%d ri=%d msr=0x%x -> v=%jx", cpu, ri, ri, *v); |
