Re: [PATCH] Re: Bad network performance over 2Gbps

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From: Bodo Eggert

Subject: Re: [PATCH] Re: Bad network performance over 2Gbps

Date: Saturday, April 19, 2008 - 8:05 am

Kok, Auke <auke-jan.h.kok@intel.com> wrote:

quoted text> [X86] IRQBALANCE: Mark as BROKEN and disable by default
> 
> The IRQBALANCE option causes interrupts to bounce all around on SMP systems
> quickly burying the CPU in migration cost and cache misses. Mainly affected
> are network interrupts and this results in one CPU pegged in softirqd
> completely.

If this is the problem, maybe it would help to only balance the IRQs each
e.g. ten seconds? Unfortunately I have no SMP system to try it out.


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Messages in current thread:

Re: [PATCH] Re: Bad network performance over 2Gbps, Bodo Eggert, (Sat Apr 19, 8:05 am)

Re: [PATCH] Re: Bad network performance over 2Gbps, Stephen Hemminger, (Sat Apr 19, 12:23 pm)

Re: [PATCH] Re: Bad network performance over 2Gbps, Rick Jones, (Mon Apr 21, 9:42 am)

Re: [PATCH] Re: Bad network performance over 2Gbps, Bodo Eggert, (Mon Apr 21, 12:52 pm)

Re: [PATCH] Re: Bad network performance over 2Gbps, Rick Jones, (Mon Apr 21, 1:02 pm)

Re: [PATCH] Re: Bad network performance over 2Gbps, Bodo Eggert, (Mon Apr 21, 2:08 pm)

Re: [PATCH] Re: Bad network performance over 2Gbps, Chris Snook, (Mon Apr 21, 2:30 pm)

Re: [PATCH] Re: Bad network performance over 2Gbps, Bodo Eggert, (Tue Apr 22, 12:36 am)

Re: [PATCH] Re: Bad network performance over 2Gbps, Kok, Auke, (Tue Apr 22, 10:46 am)


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