diff options
| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-09-02 13:28:02 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-09-15 16:51:24 +0200 |
| commit | d6a59aa3a2b1ca8411884c833a313b33b5f76e20 (patch) | |
| tree | 9a4626d9721c79add9eec752a7ff2bd61e5b58a1 /kernel | |
| parent | sched: Reduce forkexec_idx (diff) | |
| download | linux-d6a59aa3a2b1ca8411884c833a313b33b5f76e20.tar.xz linux-d6a59aa3a2b1ca8411884c833a313b33b5f76e20.zip | |
sched: Provide arch_scale_freq_power
Provide an ach specific hook for cpufreq based scaling of
cpu_power.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
[ego@in.ibm.com: spotting bugs]
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index f0ccb8b926c8..c210321adcb9 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -3552,7 +3552,18 @@ static inline int check_power_save_busiest_group(struct sd_lb_stats *sds, } #endif /* CONFIG_SCHED_MC || CONFIG_SCHED_SMT */ -unsigned long __weak arch_scale_smt_power(struct sched_domain *sd, int cpu) + +unsigned long default_scale_freq_power(struct sched_domain *sd, int cpu) +{ + return SCHED_LOAD_SCALE; +} + +unsigned long __weak arch_scale_freq_power(struct sched_domain *sd, int cpu) +{ + return default_scale_freq_power(sd, cpu); +} + +unsigned long default_scale_smt_power(struct sched_domain *sd, int cpu) { unsigned long weight = cpumask_weight(sched_domain_span(sd)); unsigned long smt_gain = sd->smt_gain; @@ -3562,6 +3573,11 @@ unsigned long __weak arch_scale_smt_power(struct sched_domain *sd, int cpu) return smt_gain; } +unsigned long __weak arch_scale_smt_power(struct sched_domain *sd, int cpu) +{ + return default_scale_smt_power(sd, cpu); +} + unsigned long scale_rt_power(int cpu) { struct rq *rq = cpu_rq(cpu); @@ -3586,7 +3602,8 @@ static void update_cpu_power(struct sched_domain *sd, int cpu) unsigned long power = SCHED_LOAD_SCALE; struct sched_group *sdg = sd->groups; - /* here we could scale based on cpufreq */ + power *= arch_scale_freq_power(sd, cpu); + power >>= SCHED_LOAD_SHIFT; if ((sd->flags & SD_SHARE_CPUPOWER) && weight > 1) { power *= arch_scale_smt_power(sd, cpu); |