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Groups > linux.kernel > #1499213
| From | Hoan Tran <hotran@apm.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH] cpufreq: CPPC: Correct desired_perf calculation |
| Date | 2016-10-11 23:40 +0200 |
| Message-ID | <srcWd-3tt-9@gated-at.bofh.it> (permalink) |
| Organization | linux.* mail to news gateway |
The desired_perf is an abstract performance number. Its value should be in the range of [lowest perf, highest perf] of CPPC. The correct calculation is desired_perf = freq * cppc_highest_perf / cppc_dmi_max_khz Signed-off-by: Hoan Tran <hotran@apm.com> --- drivers/cpufreq/cppc_cpufreq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c index 1b2f28f..ab1d4b7 100644 --- a/drivers/cpufreq/cppc_cpufreq.c +++ b/drivers/cpufreq/cppc_cpufreq.c @@ -84,7 +84,7 @@ static int cppc_cpufreq_set_target(struct cpufreq_policy *policy, cpu = all_cpu_data[policy->cpu]; - cpu->perf_ctrls.desired_perf = (u64)target_freq * policy->max / cppc_dmi_max_khz; + cpu->perf_ctrls.desired_perf = (u64)target_freq * cpu->perf_caps.highest_perf / cppc_dmi_max_khz; freqs.old = policy->cur; freqs.new = target_freq; -- 1.9.1
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[PATCH] cpufreq: CPPC: Correct desired_perf calculation Hoan Tran <hotran@apm.com> - 2016-10-11 23:40 +0200
Re: [PATCH] cpufreq: CPPC: Correct desired_perf calculation "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-10-11 23:50 +0200
Re: [PATCH] cpufreq: CPPC: Correct desired_perf calculation Hoan Tran <hotran@apm.com> - 2016-10-12 00:40 +0200
Re: [PATCH] cpufreq: CPPC: Correct desired_perf calculation Viresh Kumar <viresh.kumar@linaro.org> - 2016-10-12 05:30 +0200
Re: [PATCH] cpufreq: CPPC: Correct desired_perf calculation "Prakash, Prashanth" <pprakash@codeaurora.org> - 2016-10-12 17:40 +0200
Re: [PATCH] cpufreq: CPPC: Correct desired_perf calculation Hoan Tran <hotran@apm.com> - 2016-10-12 19:40 +0200
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