diff options
| author | Eric Saxe <Eric.Saxe@Sun.COM> | 2009-06-05 10:26:05 -0700 |
|---|---|---|
| committer | Eric Saxe <Eric.Saxe@Sun.COM> | 2009-06-05 10:26:05 -0700 |
| commit | b25e2337574c465b86a1b0cc0dbc78f14aa4eb03 (patch) | |
| tree | 87f8f90ffad0ea0cef5e3117d9b45d9cf8062a4d /usr/src/uts/common/os/cpu_pm.c | |
| parent | 8c85eba603afcc2b3f7e6f198795cee5d1c86a98 (diff) | |
| download | illumos-gate-b25e2337574c465b86a1b0cc0dbc78f14aa4eb03.tar.gz | |
6818514 Event based CPUPM too easily shifts into high gear
Diffstat (limited to 'usr/src/uts/common/os/cpu_pm.c')
| -rw-r--r-- | usr/src/uts/common/os/cpu_pm.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/usr/src/uts/common/os/cpu_pm.c b/usr/src/uts/common/os/cpu_pm.c index 848907af1d..a439db0a7c 100644 --- a/usr/src/uts/common/os/cpu_pm.c +++ b/usr/src/uts/common/os/cpu_pm.c @@ -448,8 +448,18 @@ cpupm_utilization_event(struct cpu *cp, hrtime_t now, cpupm_domain_t *dom, * this a mispredicted power state * transition due to a transient * idle period. + * + * Note: The presence of enough + * transient work across the domain can + * result in frequent transient idle + * periods. We don't want the ti + * governor being installed as a side + * effect of transient work, so the ti + * governor is left alone if the tw + * governor is already installed. */ - if (++dom->cpd_ti >= + if (dom->cpd_tw_governed == B_FALSE && + ++dom->cpd_ti >= cpupm_mispredict_thresh) { /* * There's enough transient |