Messages in this thread | | | Subject | Re: PATCH] ftrace: Add a C/P state tracer to help power optimization | From | (Frank Ch. Eigler) | Date | Mon, 27 Oct 2008 15:47:30 -0400 |
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Arjan van de Ven <arjan@infradead.org> writes:
> [...] > --- a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c > +++ b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c > [...] > @@ -427,6 +429,8 @@ static int acpi_cpufreq_target(struct cpufreq_policy *policy, > } > } > > + trace_power_mark(&it, POWER_PSTATE, next_perf_state); > + > switch (data->cpu_feature) { > case SYSTEM_INTEL_MSR_CAPABLE: > cmd.type = SYSTEM_INTEL_MSR_CAPABLE; > [...]
Is there some reason that this doesn't use tracepoints instead of such a single-backend hook?
- FChE
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