From: daniel.lezcano@linaro•org (Daniel Lezcano)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH 2/2][RFC] time : set broadcast irq affinity
Date: Mon, 25 Feb 2013 23:50:23 +0100 [thread overview]
Message-ID: <512BEAAF.1070500@linaro.org> (raw)
In-Reply-To: <20130222095530.377fd218@chromoly>
On 02/22/2013 06:55 PM, Jacob Pan wrote:
> On Thu, 21 Feb 2013 23:01:23 +0100
> Daniel Lezcano <daniel.lezcano@linaro•org> wrote:
>
>> +/*
>> + * Set broadcast interrupt affinity
>> + */
>> +static void tick_broadcast_set_affinity(struct clock_event_device
>> *bc, int cpu) +{
>> + struct cpumask cpumask;
>> +
>> + if (!(bc->features & CLOCK_EVT_FEAT_DYNIRQ))
>> + return;
>> +
>> + cpumask_clear(&cpumask);
>> + cpumask_set_cpu(cpu, &cpumask);
>> + irq_set_affinity(bc->irq, &cpumask);
> would it be more efficient to keep track of the current bc->irq affinity
> via cpumask then set it only if it is different?
Do you mean a cpumask static variable ? and something like:
if (!cpumask_test_cpu(cpu, &affinitymask)) {
cpumask_set_cpu(cpu, &affinitymask);
irq_set_affinity(bc->irq, &affinitymask)
}
--
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next prev parent reply other threads:[~2013-02-25 22:50 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <5123BE35.8070902@linaro.org>
[not found] ` <alpine.LFD.2.02.1302191904560.22263@ionos>
[not found] ` <5123C299.3080005@linaro.org>
2013-02-21 6:19 ` [resend] Timer broadcast question Santosh Shilimkar
2013-02-21 9:01 ` Daniel Lezcano
2013-02-21 9:14 ` Santosh Shilimkar
2013-02-21 22:01 ` [PATCH 1/2] time : pass broadcast device parameter Daniel Lezcano
2013-02-21 22:01 ` [PATCH 2/2][RFC] time : set broadcast irq affinity Daniel Lezcano
2013-02-22 17:55 ` Jacob Pan
2013-02-22 18:45 ` Thomas Gleixner
2013-02-25 22:50 ` Daniel Lezcano [this message]
2013-02-25 23:00 ` Jacob Pan
2013-02-26 8:45 ` [PATCH 1/2] time : pass broadcast device parameter Viresh Kumar
2013-02-26 11:30 ` Daniel Lezcano
2013-02-26 11:31 ` Daniel Lezcano
2013-02-26 12:14 ` Viresh Kumar
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