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Maf
Guru
Joined: 15 May 2005
Posts: 310
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 Posted: Thu Nov 20, 2008 1:24 pm Post subject: irqbalance - do I still need it? |
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Hi there. I just moved from amd x2 to intel e5200 and I noticed, that interrupts are perfectly divided between two cores. Do I still need irqbalance?
Is there some substitution in kernel or somewhere? |
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gringo
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Joined: 27 Apr 2003
Posts: 3793
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| Posted: Thu Nov 20, 2008 3:26 pm Post subject: |
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| Quote: | | Is there some substitution in kernel or somewhere? |
balancing can also be done by the kernel, yes ( in case you enabled it of course - grep for CONFIG_IRQBALANCE in your kernel .config).
But the userspace daemon is supposed to do a better job and also to be more power efficient, use that one instead.
cheers
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depontius
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Joined: 05 May 2004
Posts: 3525
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| Posted: Thu Nov 20, 2008 6:45 pm Post subject: |
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Running "powertop" advises to deconfigure the kernel IRQ balancing, and use userspace instead.
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Gef
Apprentice
Joined: 17 May 2008
Posts: 180
Location: France
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| Posted: Thu Nov 20, 2008 8:32 pm Post subject: |
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@Gringo,
Thanks for the tip.
Here is a useful documentation : http://www.irqbalance.org/documentation.php
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Massimo B.
Veteran
Joined: 09 Feb 2005
Posts: 1833
Location: PB, Germany
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| Posted: Wed Aug 08, 2012 10:31 am Post subject: |
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And today, as of 3.5.0? I can't even find any CONFIG_IRQBALANCE in that sources.
PS.: I tried ircbalance and my harddrive lost interrupt, I needed to restart hardly by SYSREQ. So I quickly unmerged this tool..
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Ant P.
Watchman
Joined: 18 Apr 2009
Posts: 6920
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| Posted: Wed Aug 08, 2012 5:29 pm Post subject: |
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| irqbalance is pretty much worthless on anything but a real NUMA system. |
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