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intel_cstates: Computing C-state requires constant time step

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Pawel Dziepak
2013-12-19 20:47:22 +01:00
parent 3add52e8ba
commit caf1b0dffb
1 changed files with 4 additions and 3 deletions
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src/add-ons/kernel/power/cpuidle/intel_cstates/intel_cstates.cpp
+4 -3
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@@ -76,13 +76,14 @@ cstates_idle(void)
ASSERT(thread_get_current_thread()->pinned_to_cpu > 0); ASSERT(thread_get_current_thread()->pinned_to_cpu > 0);
int32 cpu = smp_get_current_cpu(); int32 cpu = smp_get_current_cpu();
bigtime_t timeStep = sTimeStep;
bigtime_t idleTime = sIdleTime[cpu]; bigtime_t idleTime = sIdleTime[cpu];
int state = min_c(idleTime / sTimeStep, sCStateCount - 1); int state = min_c(idleTime / timeStep, sCStateCount - 1);
ASSERT(state >= 0 && state < sCStateCount); ASSERT(state >= 0 && state < sCStateCount);
int subState = idleTime % sTimeStep; int subState = idleTime % timeStep;
subState /= sTimeStep / sCStates[state].fSubStatesCount; subState /= timeStep / sCStates[state].fSubStatesCount;
ASSERT(subState >= 0 && subState < sCStates[state].fSubStatesCount); ASSERT(subState >= 0 && subState < sCStates[state].fSubStatesCount);