linux-kernel - Re: [PATCH] clocksource: dw_apb_timer: add dynamic irq flag to the timer

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Message-ID: <5596A324.4040800@linaro.org>
Date:	Fri, 03 Jul 2015 16:58:44 +0200
From:	Daniel Lezcano <daniel.lezcano@...aro.org>
To:	Jisheng Zhang <jszhang@...vell.com>, tglx@...utronix.de
CC:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] clocksource: dw_apb_timer: add dynamic irq flag to the
 timer

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@...vell.com>
> ---

I am glad this flag helps. Were you able to do some measurements ?

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