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Date: Sat, 19 Apr 2008 17:05:06 +0200 From: Bodo Eggert <7eggert@....de> To: Kok@...r.kernel.org, Auke <auke-jan.h.kok@...el.com>, Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>, "H. Peter Anvin" <hpa@...or.com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Anton Titov <a.titov@...t.bg>, Chris Snook <csnook@...hat.com>, "H. Willstrand" <h.willstrand@...il.com>, netdev@...r.kernel.org, Jesse Brandeburg <jesse.brandeburg@...el.com>, Linus Torvalds <torvalds@...ux-foundation.org>, Andrew Morton <akpm@...ux-foundation.org> Subject: Re: [PATCH] Re: Bad network performance over 2Gbps Kok, Auke <auke-jan.h.kok@...el.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 linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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