Hello all. Interesting think: Have PC that do NAT. Bandwidth about 600 mbs. Have 4 CPU (2xCoRe 2 DUO "HT OFF" 3.2 HZ). irqbalance in kernel is off. nat2 ~ # cat /proc/irq/217/smp_affinity 00000001 nat2 ~ # cat /proc/irq/218/smp_affinity 00000003 Load SI on CPU0 and CPU1 is about 90% Good... try do echo ffffffff > /proc/irq/217/smp_affinity echo ffffffff > /proc/irq/218/smp_affinity Get 100% SI at CPU0 Question Why? I listen that if use IRQ from 1 netdevice to 1 CPU i can get 30% perfomance... but i have 4 CPU... i must get more perfomance if i cat "ffffffff" to smp_affinity. picture looks liks this: 0-3 CPU get over 50% SI.... bandwith up.... 55% SI... bandwith up... 100% SI on CPU0.... I remember patch to fix problem like it... patched function e1000_clean... kernel on pc have this patch (2.6.24-rc7-git2)... e1000 driver work much better (i up to 1.5-2x bandwidth before i get 100% SI), but i think that it not get 100% that it can =) Thanks for answers and sorry for my English -- 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
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