Messages in this thread | | | From | "Rafael J. Wysocki" <> | Date | Fri, 19 May 2017 03:03:15 +0200 | Subject | Re: [PATCH 1/2] cpufreq: Make iowait boost a policy option |
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On Thu, May 18, 2017 at 8:30 PM, Joel Fernandes <joelaf@google.com> wrote: > Make iowait boost a cpufreq policy option and enable it for intel_pstate > cpufreq driver. Governors like schedutil can use it to determine if > boosting for tasks that wake up with p->in_iowait set is needed. > > Signed-off-by: Joel Fernandes <joelaf@google.com> > --- > drivers/cpufreq/intel_pstate.c | 1 + > include/linux/cpufreq.h | 3 +++ > 2 files changed, 4 insertions(+) > > diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c > index b7de5bd76a31..a3099f099779 100644 > --- a/drivers/cpufreq/intel_pstate.c > +++ b/drivers/cpufreq/intel_pstate.c > @@ -2239,6 +2239,7 @@ static int intel_cpufreq_cpu_init(struct cpufreq_policy *policy) > > policy->cpuinfo.transition_latency = INTEL_CPUFREQ_TRANSITION_LATENCY; > policy->transition_delay_us = INTEL_CPUFREQ_TRANSITION_DELAY; > + policy->iowait_boost_enable = 1; > /* This reflects the intel_pstate_get_cpu_pstates() setting. */ > policy->cur = policy->cpuinfo.min_freq; > > diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h > index a5ce0bbeadb5..4bb086dbe7ec 100644 > --- a/include/linux/cpufreq.h > +++ b/include/linux/cpufreq.h > @@ -127,6 +127,9 @@ struct cpufreq_policy { > */ > unsigned int transition_delay_us; > > + /* Boost switch for tasks with p->in_iowait set */ > + unsigned int iowait_boost_enable;
Could that be a bool field?
> + > /* Cached frequency lookup from cpufreq_driver_resolve_freq. */ > unsigned int cached_target_freq; > int cached_resolved_idx; > -- > 2.13.0.303.g4ebf302169-goog >
Thanks, Rafael
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