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From: Lin Feng <linfeng@cn.fujitsu.com>
To: Lenky Gao <lenky.gao@gmail.com>
Cc: linux-kernel@vger.kernel.org, yinghai@kernel.org, mingo@elte.hu,
	gorcunov@gmail.com, rusty@rustcorp.com.au, sivanich@sgi.com,
	agordeev@redhat.com
Subject: Re: Question: How to distribute the interrupts over multiple cores?
Date: Mon, 25 Mar 2013 10:58:54 +0800	[thread overview]
Message-ID: <514FBD6E.2030706@cn.fujitsu.com> (raw)
In-Reply-To: <CAAO_Xo6=2PKumrxjb1XthsiVVFJcz33o5wf2OyXN9pPdu1GCRA@mail.gmail.com>

Hi Gao,

On 03/25/2013 10:33 AM, Lenky Gao wrote:
> [root@localhost ~]# echo 6 > /proc/irq/25/smp_affinity
> [root@localhost ~]# cat /proc/irq/25/smp_affinity
> 000006
Seems you bind the nic irq to second and third cpu for the bit mask
you set is 110, so now eth9's irq is working on the 3rd cpu.

Have you ever tried irqbalance service? It may help to balance irq if the 
irq workload of 3rd cpu is too heavy.

thanks,
linfeng
> [root@localhost ~]# cat /proc/interrupts | grep eth9
>   25:       5824      13914        159        128        210
> 0          0          0  IR-IO-APIC-fasteoi   eth9
> [root@localhost ~]# cat /proc/interrupts | grep eth9
>   25:       5824      13927        159        128        210
> 0          0          0  IR-IO-APIC-fasteoi   eth9
> [root@localhost ~]# cat /proc/interrupts | grep eth9
>   25:       5824      13939        159        128        210
> 0          0          0  IR-IO-APIC-fasteoi   eth9
> [root@localhost ~]# cat /proc/interrupts | grep eth9
>   25:       5824      13973        159        128        210
> 0          0          0  IR-IO-APIC-fasteoi   eth9

  reply	other threads:[~2013-03-25  2:56 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-03-25  2:33 Question: How to distribute the interrupts over multiple cores? Lenky Gao
2013-03-25  2:58 ` Lin Feng [this message]
2013-03-25  3:18   ` Lenky Gao
2013-03-25  3:24     ` Lin Feng
2013-03-25  3:44       ` Lenky Gao
2013-03-25  5:19         ` Lin Feng
2013-03-25  6:46           ` Lenky Gao
2013-03-25  7:04             ` Lin Feng
2013-03-25  7:10               ` Lenky Gao
2013-03-25  9:00                 ` Lenky Gao
2013-03-25  9:41                   ` Lin Feng
2013-03-25  9:45                     ` Lenky Gao

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