From: daniel.lezcano@linaro.org (Daniel Lezcano)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] clocksource: dw_apb_timer: add dynamic irq flag to the timer
Date: Fri, 03 Jul 2015 16:58:44 +0200 [thread overview]
Message-ID: <5596A324.4040800@linaro.org> (raw)
In-Reply-To: <1435933847-2069-1-git-send-email-jszhang@marvell.com>
On 07/03/2015 04:30 PM, Jisheng Zhang wrote:
> Commit d2348fb6fdc6 ("tick: Dynamically set broadcast irq affinity")
> adds one excelent feature CLOCK_EVT_FEAT_DYNIRQ to let the core set the
> interrupt affinity of the broadcast interrupt to the cpu which has the
> earliest expiry time. This patch adds CLOCK_EVT_FEAT_DYNIRQ flag to
> avoid unnecessary wakeups and IPIs when the dw_apb_timer is used as
> broadcast timer.
>
> Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
> ---
I am glad this flag helps. Were you able to do some measurements ?
--
<http://www.linaro.org/> Linaro.org ? Open source software for ARM SoCs
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WARNING: multiple messages have this Message-ID (diff)
From: Daniel Lezcano <daniel.lezcano@linaro.org>
To: Jisheng Zhang <jszhang@marvell.com>, tglx@linutronix.de
Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH] clocksource: dw_apb_timer: add dynamic irq flag to the timer
Date: Fri, 03 Jul 2015 16:58:44 +0200 [thread overview]
Message-ID: <5596A324.4040800@linaro.org> (raw)
In-Reply-To: <1435933847-2069-1-git-send-email-jszhang@marvell.com>
On 07/03/2015 04:30 PM, Jisheng Zhang wrote:
> Commit d2348fb6fdc6 ("tick: Dynamically set broadcast irq affinity")
> adds one excelent feature CLOCK_EVT_FEAT_DYNIRQ to let the core set the
> interrupt affinity of the broadcast interrupt to the cpu which has the
> earliest expiry time. This patch adds CLOCK_EVT_FEAT_DYNIRQ flag to
> avoid unnecessary wakeups and IPIs when the dw_apb_timer is used as
> broadcast timer.
>
> Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
> ---
I am glad this flag helps. Were you able to do some measurements ?
--
<http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs
Follow Linaro: <http://www.facebook.com/pages/Linaro> Facebook |
<http://twitter.com/#!/linaroorg> Twitter |
<http://www.linaro.org/linaro-blog/> Blog
next prev parent reply other threads:[~2015-07-03 14:58 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-03 14:30 [PATCH] clocksource: dw_apb_timer: add dynamic irq flag to the timer Jisheng Zhang
2015-07-03 14:30 ` Jisheng Zhang
2015-07-03 14:58 ` Daniel Lezcano [this message]
2015-07-03 14:58 ` Daniel Lezcano
2015-07-04 3:40 ` Jisheng Zhang
2015-07-04 3:40 ` Jisheng Zhang
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