From: Ionela Voinescu <ionela.voinescu@arm.com> To: rjw@rjwysocki.net, viresh.kumar@linaro.org, catalin.marinas@arm.com, sudeep.holla@arm.com, will@kernel.org, linux@armlinux.org.uk, valentin.schneider@arm.com Cc: mingo@redhat.com, peterz@infradead.org, dietmar.eggemann@arm.com, ionela.voinescu@arm.com, linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH 8/8] cpufreq: make schedutil the default for arm and arm64 Date: Wed, 1 Jul 2020 10:07:51 +0100 Message-ID: <20200701090751.7543-9-ionela.voinescu@arm.com> (raw) In-Reply-To: <20200701090751.7543-1-ionela.voinescu@arm.com> From: Valentin Schneider <valentin.schneider@arm.com> schedutil is already a hard-requirement for EAS, which has lead to making it default on arm (when CONFIG_BIG_LITTLE), see: commit 8fdcca8e254a ("cpufreq: Select schedutil when using big.LITTLE") One thing worth pointing out is that schedutil isn't only relevant for asymmetric CPU capacity systems; for instance, schedutil is the only governor that honours util-clamp performance requests. Another good example of this is x86 switching to using it by default in: commit a00ec3874e7d ("cpufreq: intel_pstate: Select schedutil as the default governor") Arguably it should be made the default for all architectures, but it seems better to wait for them to also gain frequency invariance powers. Make it the default for arm && arm64 for now. Signed-off-by: Valentin Schneider <valentin.schneider@arm.com> Signed-off-by: Ionela Voinescu <ionela.voinescu@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Viresh Kumar <viresh.kumar@linaro.org> --- drivers/cpufreq/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig index e91750132552..2c7171e0b001 100644 --- a/drivers/cpufreq/Kconfig +++ b/drivers/cpufreq/Kconfig @@ -37,7 +37,7 @@ config CPU_FREQ_STAT choice prompt "Default CPUFreq governor" default CPU_FREQ_DEFAULT_GOV_USERSPACE if ARM_SA1100_CPUFREQ || ARM_SA1110_CPUFREQ - default CPU_FREQ_DEFAULT_GOV_SCHEDUTIL if BIG_LITTLE + default CPU_FREQ_DEFAULT_GOV_SCHEDUTIL if ARM64 || ARM default CPU_FREQ_DEFAULT_GOV_SCHEDUTIL if X86_INTEL_PSTATE && SMP default CPU_FREQ_DEFAULT_GOV_PERFORMANCE help -- 2.17.1
prev parent reply index Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-07-01 9:07 [PATCH 0/8] cpufreq: improve frequency invariance support Ionela Voinescu 2020-07-01 9:07 ` [PATCH 1/8] cpufreq: allow drivers to flag custom support for freq invariance Ionela Voinescu 2020-07-01 10:46 ` Viresh Kumar 2020-07-01 13:33 ` Ionela Voinescu 2020-07-01 16:05 ` Rafael J. Wysocki 2020-07-01 18:06 ` Ionela Voinescu 2020-07-02 2:58 ` Viresh Kumar 2020-07-02 11:44 ` Ionela Voinescu 2020-07-06 12:14 ` Dietmar Eggemann 2020-07-09 8:53 ` Ionela Voinescu 2020-07-09 9:09 ` Viresh Kumar 2020-07-01 9:07 ` [PATCH 2/8] cpufreq: move invariance setter calls in cpufreq core Ionela Voinescu 2020-07-01 10:46 ` Viresh Kumar 2020-07-01 15:27 ` Ionela Voinescu 2020-07-01 15:51 ` Rafael J. Wysocki 2020-07-02 3:01 ` Viresh Kumar 2020-07-02 11:45 ` Ionela Voinescu 2020-07-01 9:07 ` [PATCH 3/8] cpufreq,drivers: remove setting of frequency scale factor Ionela Voinescu 2020-07-01 9:07 ` [PATCH 4/8] cpufreq,vexpress-spc: fix Frequency Invariance (FI) for bL switching Ionela Voinescu 2020-07-01 10:46 ` Viresh Kumar 2020-07-01 14:07 ` Ionela Voinescu 2020-07-02 3:05 ` Viresh Kumar 2020-07-02 11:41 ` Ionela Voinescu 2020-07-02 11:46 ` Viresh Kumar 2020-07-01 9:07 ` [PATCH 5/8] cpufreq: report whether cpufreq supports Frequency Invariance (FI) Ionela Voinescu 2020-07-01 10:46 ` Viresh Kumar 2020-07-01 9:07 ` [PATCH 6/8] arch_topology,cpufreq,sched/core: constify arch_* cpumasks Ionela Voinescu 2020-07-01 9:07 ` [PATCH 7/8] arch_topology,arm64: define arch_scale_freq_invariant() Ionela Voinescu 2020-07-01 9:07 ` Ionela Voinescu [this message]
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