linux-kernel - Question: How to distribute the interrupts over multiple cores?

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Date:	Mon, 25 Mar 2013 10:33:56 +0800
From:	Lenky Gao <lenky.gao@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	yinghai@...nel.org, mingo@...e.hu, gorcunov@...il.com,
	rusty@...tcorp.com.au, sivanich@....com, agordeev@...hat.com
Subject: Question: How to distribute the interrupts over multiple cores?

Hi everyone,

I faced the same problem as this URL:
http://stackoverflow.com/questions/13641440/unable-to-distrubute-the-interrupts-over-multiple-cores

The question have been closed with no answer. :(

My machine have 2x Xeon E5504 processors and running vanilla kernel
3.6.11 in CentOS 6.0.

Could anyone give me some tips?

PS:
[root@...alhost ~]# cat /proc/cmdline
ro root=/dev/mapper/vg_localhost-lv_root rd_NO_LUKS LANG=en_US.UTF-8
rd_NO_MD quiet rd_LVM_LV=vg_localhost/lv_swap
SYSFONT=latarcyrheb-sun16 rhgb rd_LVM_LV=vg_localhost/lv_root
KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM apic=debug pci=nomsi
[root@...alhost ~]# uname -a
Linux localhost.lenkydomain 3.6.11 #2 SMP Fri Mar 22 21:13:41 CST 2013
x86_64 x86_64 x86_64 GNU/Linux
[root@...alhost ~]# echo 6 > /proc/irq/25/smp_affinity
[root@...alhost ~]# cat /proc/irq/25/smp_affinity
000006
[root@...alhost ~]# cat /proc/interrupts | grep eth9
  25:       5824      13914        159        128        210
0          0          0  IR-IO-APIC-fasteoi   eth9
[root@...alhost ~]# cat /proc/interrupts | grep eth9
  25:       5824      13927        159        128        210
0          0          0  IR-IO-APIC-fasteoi   eth9
[root@...alhost ~]# cat /proc/interrupts | grep eth9
  25:       5824      13939        159        128        210
0          0          0  IR-IO-APIC-fasteoi   eth9
[root@...alhost ~]# cat /proc/interrupts | grep eth9
  25:       5824      13973        159        128        210
0          0          0  IR-IO-APIC-fasteoi   eth9


-- 
Regards,

Lenky
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