diff options
| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-07-19 15:10:37 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-07-21 14:28:37 +0200 |
| commit | bc95a454b6dcf6aa464deef86e18c1770b8682b8 (patch) | |
| tree | 0326ba841cdc5e75edb7713a4c35c00bb8dc0be2 /drivers/cpufreq | |
| parent | 2630abc243f8d014767c4eec1deb946bdbbcfc81 (diff) | |
| download | linux-bc95a454b6dcf6aa464deef86e18c1770b8682b8.tar.bz2 | |
intel_pstate: Update cpu_frequency tracepoint every time
Currently, intel_pstate only updates the cpu_frequency tracepoint
if the new P-state to set is different from the current one, but
that causes powertop to report 100% idle on an 100% loaded system
sometimes.
Prevent that from happening by updating the cpu_frequency tracepoint
every time intel_pstate_update_pstate() is called.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>-
Diffstat (limited to 'drivers/cpufreq')
| -rw-r--r-- | drivers/cpufreq/intel_pstate.c | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index edb3b6981b73..9c8a78f9ddce 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -1132,17 +1132,12 @@ static void intel_pstate_get_min_max(struct cpudata *cpu, int *min, int *max) *min = clamp_t(int, min_perf, cpu->pstate.min_pstate, max_perf); } -static inline void intel_pstate_record_pstate(struct cpudata *cpu, int pstate) -{ - trace_cpu_frequency(pstate * cpu->pstate.scaling, cpu->cpu); - cpu->pstate.current_pstate = pstate; -} - static void intel_pstate_set_min_pstate(struct cpudata *cpu) { int pstate = cpu->pstate.min_pstate; - intel_pstate_record_pstate(cpu, pstate); + trace_cpu_frequency(pstate * cpu->pstate.scaling, cpu->cpu); + cpu->pstate.current_pstate = pstate; /* * Generally, there is no guarantee that this code will always run on * the CPU being updated, so force the register update to run on the @@ -1302,10 +1297,11 @@ static inline void intel_pstate_update_pstate(struct cpudata *cpu, int pstate) intel_pstate_get_min_max(cpu, &min_perf, &max_perf); pstate = clamp_t(int, pstate, min_perf, max_perf); + trace_cpu_frequency(pstate * cpu->pstate.scaling, cpu->cpu); if (pstate == cpu->pstate.current_pstate) return; - intel_pstate_record_pstate(cpu, pstate); + cpu->pstate.current_pstate = pstate; wrmsrl(MSR_IA32_PERF_CTL, pstate_funcs.get_val(cpu, pstate)); } |