| Message ID | 1479317491-7435-2-git-send-email-sudeep.holla@arm.com |
|---|---|
| State | New |
| Headers | show |
On 16/11/16 17:31, Sudeep Holla wrote: > The core and the cluster sleep state entry latencies can't be same as > cluster sleep involves more work compared to core level e.g. shared > cache maintenance. > > Experiments have shown on an average about 100us more latency for the > cluster sleep state compared to the core level sleep. This patch fixes > the entry latency for the cluster sleep state. > > Fixes: 28e10a8f3a03 ("arm64: dts: juno: Add idle-states to device tree") > Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> > Cc: "Jon Medhurst (Tixy)" <tixy@linaro.org> > Reviewed-by: Liviu Dudau <Liviu.Dudau@arm.com> > Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> You missed to pick up this, I posted this along with vexpress config bus fix. Sorry for the confusion, I feel pull request are better/easier to track than single patches. I will send PR from next time if also prefer that. Let me know. -- Regards, Sudeep _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
On Thursday, December 1, 2016 10:11:24 AM CET Sudeep Holla wrote: > On 16/11/16 17:31, Sudeep Holla wrote: > > The core and the cluster sleep state entry latencies can't be same as > > cluster sleep involves more work compared to core level e.g. shared > > cache maintenance. > > > > Experiments have shown on an average about 100us more latency for the > > cluster sleep state compared to the core level sleep. This patch fixes > > the entry latency for the cluster sleep state. > > > > Fixes: 28e10a8f3a03 ("arm64: dts: juno: Add idle-states to device tree") > > Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> > > Cc: "Jon Medhurst (Tixy)" <tixy@linaro.org> > > Reviewed-by: Liviu Dudau <Liviu.Dudau@arm.com> > > Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> > > You missed to pick up this, I posted this along with vexpress config bus > fix. Sorry for the confusion, I feel pull request are better/easier to > track than single patches. I will send PR from next time if also prefer > that. Let me know. Ok, I've applied that to the 4.9-fixes branch. Thanks for double-checking. Arnd _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
diff --git a/arch/arm64/boot/dts/arm/juno-r1.dts b/arch/arm64/boot/dts/arm/juno-r1.dts index 123a58b29cbd..f0b857d6d73c 100644 --- a/arch/arm64/boot/dts/arm/juno-r1.dts +++ b/arch/arm64/boot/dts/arm/juno-r1.dts @@ -76,7 +76,7 @@ compatible = "arm,idle-state"; arm,psci-suspend-param = <0x1010000>; local-timer-stop; - entry-latency-us = <300>; + entry-latency-us = <400>; exit-latency-us = <1200>; min-residency-us = <2500>; }; diff --git a/arch/arm64/boot/dts/arm/juno-r2.dts b/arch/arm64/boot/dts/arm/juno-r2.dts index 007be826efce..26aaa6a7670f 100644 --- a/arch/arm64/boot/dts/arm/juno-r2.dts +++ b/arch/arm64/boot/dts/arm/juno-r2.dts @@ -76,7 +76,7 @@ compatible = "arm,idle-state"; arm,psci-suspend-param = <0x1010000>; local-timer-stop; - entry-latency-us = <300>; + entry-latency-us = <400>; exit-latency-us = <1200>; min-residency-us = <2500>; }; diff --git a/arch/arm64/boot/dts/arm/juno.dts b/arch/arm64/boot/dts/arm/juno.dts index a7270eff6939..6e154d948a80 100644 --- a/arch/arm64/boot/dts/arm/juno.dts +++ b/arch/arm64/boot/dts/arm/juno.dts @@ -76,7 +76,7 @@ compatible = "arm,idle-state"; arm,psci-suspend-param = <0x1010000>; local-timer-stop; - entry-latency-us = <300>; + entry-latency-us = <400>; exit-latency-us = <1200>; min-residency-us = <2500>; };
The core and the cluster sleep state entry latencies can't be same as cluster sleep involves more work compared to core level e.g. shared cache maintenance. Experiments have shown on an average about 100us more latency for the cluster sleep state compared to the core level sleep. This patch fixes the entry latency for the cluster sleep state. Fixes: 28e10a8f3a03 ("arm64: dts: juno: Add idle-states to device tree") Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: "Jon Medhurst (Tixy)" <tixy@linaro.org> Reviewed-by: Liviu Dudau <Liviu.Dudau@arm.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> --- arch/arm64/boot/dts/arm/juno-r1.dts | 2 +- arch/arm64/boot/dts/arm/juno-r2.dts | 2 +- arch/arm64/boot/dts/arm/juno.dts | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel