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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 15:04:42 +0800	[thread overview]
Message-ID: <514FF70A.6080402@cn.fujitsu.com> (raw)
In-Reply-To: <CAAO_Xo6dG8C_-e4mHuKm12vQ7MVoYR8fPggK00T28i0JzqpDyA@mail.gmail.com>



On 03/25/2013 02:46 PM, Lenky Gao wrote:
>> Do you mean on your old machine the irq will be distributed automatically
>> among the cpus set by smp_affinity?
>>
> 
> Yes. My another machine's interrupts are as follows:
And without irqbalance service? It sounds weird to me..

thanks,
linfeng

> 
> [root@localhost ~]# cat /proc/cpuinfo
> processor	: 0
> vendor_id	: GenuineIntel
> cpu family	: 6
> model		: 23
> model name	: Pentium(R) Dual-Core  CPU      E6700  @ 3.20GHz
> ...
> [root@localhost ~]# echo 3 > /proc/irq/18/smp_affinity
> [root@localhost ~]# cat /proc/irq/18/smp_affinity
> 3
> [root@localhost ~]# cat /proc/interrupts | grep eth2
>   18:        455       458   IO-APIC-fasteoi   eth2
> [root@localhost ~]# cat /proc/interrupts | grep eth2
>   18:        463       467   IO-APIC-fasteoi   eth2
> [root@localhost ~]# cat /proc/interrupts | grep eth2
>   18:        471       476   IO-APIC-fasteoi   eth2
> 
> 

  reply	other threads:[~2013-03-25  7:02 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
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 [this message]
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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