From: Krzysztof Kozlowski <k.kozlowski@samsung.com>
To: Daniel Lezcano <daniel.lezcano@linaro.org>,
Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
Kukjin Kim <kgene.kim@samsung.com>
Cc: linux-samsung-soc@vger.kernel.org, linux-pm@vger.kernel.org,
Sachin Kamat <sachin.kamat@linaro.org>,
Viresh Kumar <viresh.kumar@linaro.org>,
Tomasz Figa <t.figa@samsung.com>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
linux-kernel@vger.kernel.org,
Kyungmin Park <kyungmin.park@samsung.com>,
linaro-kernel@lists.linaro.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v5 0/5] ARM: EXYNOS: cpuidle: fix AFTR mode on boards with secure firmware enabled
Date: Tue, 05 Aug 2014 16:26:23 +0200 [thread overview]
Message-ID: <53E0E98F.5020706@samsung.com> (raw)
In-Reply-To: <53E0E420.8060207@linaro.org>
On 05.08.2014 16:03, Daniel Lezcano wrote:
> On 08/05/2014 03:34 PM, Bartlomiej Zolnierkiewicz wrote:
>> Hi,
>>
>> This patch series adds support for AFTR idle mode on boards with
>> secure firmware enabled and allows EXYNOS cpuidle driver usage on
>> Exynos4x12 SoCs.
>>
>> It has been tested on Trats2 board (using Exynos4412 SoC with secure
>> firmware enabled) on which AFTR mode reduces power consumption by ~12%
>> when EXYNOS cpuidle driver is enabled (in both cases the default
>> exynos_defconfig config is used and CPU1-3 are offlined).
>
> As a sidenote:
>
> On my odroid-U2:
> * 4 cpus online -> 130 mA
> * 3 cpus online -> 164 mA
> * 2 cpus online -> 160 mA
> * 1 cpu online -> 157 mA
>
> So were are consuming more when there are unplugged cpu ... any ideas ?
On which tree are you testing? Current next has ARMCLK down feature
enabled. ARMCLK down may stop working after hotunplugging CPU:
http://www.spinics.net/lists/arm-kernel/msg352890.html
That was observed especially on Exynos4212 where ARMCLK down stops
working permanently. On Trats2 (Exynos4412) the clock down stopped only
a for short period after disabling CPU.
Best regards,
Krzysztof
WARNING: multiple messages have this Message-ID (diff)
From: k.kozlowski@samsung.com (Krzysztof Kozlowski)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v5 0/5] ARM: EXYNOS: cpuidle: fix AFTR mode on boards with secure firmware enabled
Date: Tue, 05 Aug 2014 16:26:23 +0200 [thread overview]
Message-ID: <53E0E98F.5020706@samsung.com> (raw)
In-Reply-To: <53E0E420.8060207@linaro.org>
On 05.08.2014 16:03, Daniel Lezcano wrote:
> On 08/05/2014 03:34 PM, Bartlomiej Zolnierkiewicz wrote:
>> Hi,
>>
>> This patch series adds support for AFTR idle mode on boards with
>> secure firmware enabled and allows EXYNOS cpuidle driver usage on
>> Exynos4x12 SoCs.
>>
>> It has been tested on Trats2 board (using Exynos4412 SoC with secure
>> firmware enabled) on which AFTR mode reduces power consumption by ~12%
>> when EXYNOS cpuidle driver is enabled (in both cases the default
>> exynos_defconfig config is used and CPU1-3 are offlined).
>
> As a sidenote:
>
> On my odroid-U2:
> * 4 cpus online -> 130 mA
> * 3 cpus online -> 164 mA
> * 2 cpus online -> 160 mA
> * 1 cpu online -> 157 mA
>
> So were are consuming more when there are unplugged cpu ... any ideas ?
On which tree are you testing? Current next has ARMCLK down feature
enabled. ARMCLK down may stop working after hotunplugging CPU:
http://www.spinics.net/lists/arm-kernel/msg352890.html
That was observed especially on Exynos4212 where ARMCLK down stops
working permanently. On Trats2 (Exynos4412) the clock down stopped only
a for short period after disabling CPU.
Best regards,
Krzysztof
next prev parent reply other threads:[~2014-08-05 14:26 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-05 13:34 [PATCH v5 0/5] ARM: EXYNOS: cpuidle: fix AFTR mode on boards with secure firmware enabled Bartlomiej Zolnierkiewicz
2014-08-05 13:34 ` Bartlomiej Zolnierkiewicz
2014-08-05 13:34 ` [PATCH v5 1/5] ARM: EXYNOS: PM: replace EXYNOS_BOOT_VECTOR_* macros by static inlines Bartlomiej Zolnierkiewicz
2014-08-05 13:34 ` Bartlomiej Zolnierkiewicz
2014-08-05 13:34 ` Bartlomiej Zolnierkiewicz
2014-08-05 13:34 ` [PATCH v5 2/5] ARM: EXYNOS: add AFTR mode support to firmware do_idle method Bartlomiej Zolnierkiewicz
2014-08-05 13:34 ` Bartlomiej Zolnierkiewicz
2014-08-05 13:34 ` [PATCH v5 3/5] ARM: EXYNOS: cpuidle: add secure firmware support to AFTR mode code Bartlomiej Zolnierkiewicz
2014-08-05 13:34 ` Bartlomiej Zolnierkiewicz
2014-08-05 13:34 ` [PATCH v5 4/5] ARM: EXYNOS: PM: fix register setup for " Bartlomiej Zolnierkiewicz
2014-08-05 13:34 ` Bartlomiej Zolnierkiewicz
2014-08-05 13:34 ` [PATCH v5 5/5] ARM: EXYNOS: cpuidle: allow driver usage on Exynos4x12 SoCs Bartlomiej Zolnierkiewicz
2014-08-05 13:34 ` Bartlomiej Zolnierkiewicz
2014-08-05 13:50 ` [PATCH v5 0/5] ARM: EXYNOS: cpuidle: fix AFTR mode on boards with secure firmware enabled Daniel Lezcano
2014-08-05 13:50 ` Daniel Lezcano
2014-08-07 17:18 ` Bartlomiej Zolnierkiewicz
2014-08-07 17:18 ` Bartlomiej Zolnierkiewicz
2014-08-05 14:03 ` Daniel Lezcano
2014-08-05 14:03 ` Daniel Lezcano
2014-08-05 14:26 ` Krzysztof Kozlowski [this message]
2014-08-05 14:26 ` Krzysztof Kozlowski
2014-08-05 15:07 ` Daniel Lezcano
2014-08-05 15:07 ` Daniel Lezcano
2014-09-05 12:28 ` Krzysztof Kozlowski
2014-09-05 12:28 ` Krzysztof Kozlowski
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