Sorry. that i interfere in this subject. Do you recommend CONFIG_IRQBALANCE to be enabled?
If it is enabled - irq's not jumping nonstop over processors. softirqd changing this behavior. If it is disabled, irq's distributed over each processor, and in loaded systems it seems harmful. I work a little yesterday with server with CONFIG_IRQBALANCE=no, 160kpps load. It was packetloss-ing, till i set smp_affinity. Maybe it is useful to put more info in Kconfig, since it is very important for performance option. On Fri, 11 Jan 2008 17:41:09 -0800 (PST), David Miller wrote > From: Benny Amorsen <benny [EMAIL PROTECTED]> > Date: Fri, 11 Jan 2008 12:09:32 0100 > > > David Miller <[EMAIL PROTECTED]> writes: > > > > > No IRQ balancing should be done at all for networking device > > > interrupts, with zero exceptions. It destroys performance. > > > > Does irqbalanced need to be taught about this? > > The userland one already does. > > It's only the in-kernel IRQ load balancing for these (presumably > powerpc) platforms that is broken. > -- > To unsubscribe from this list: send the line "unsubscribe netdev" in > the body of a message to [EMAIL PROTECTED] > More majordomo info at http://vger.kernel.org/majordomo-info.html -- Denys Fedoryshchenko Technical Manager Virtual ISP S.A.L. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html