Messages in this thread | | | Date | Sat, 19 Apr 2008 12:23:54 -0700 | From | Stephen Hemminger <> | Subject | Re: [PATCH] Re: Bad network performance over 2Gbps |
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Bodo Eggert wrote: > Kok, Auke <auke-jan.h.kok@intel.com> wrote: > > >> [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. > > > -- > To unsubscribe from this list: send the line "unsubscribe netdev" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > The kernel level IRQBALANCE is useless. The userlevel irqbalance does the right thing, it handles multi-core, and network devices, and all the other special cases. *Don't use kernel level irqbalance*
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