On 18-02-2008 10:18, Badalian Vyacheslav wrote: > Hello all. Hi,
> 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 think you should show here /proc/interrupts in all these cases. > > 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 =) If some patch works for you, and you can show here its advantages, you should probably add here some link and request for merging. BTW, I wonder if you tried to check if changing CONFIG_HZ makes any difference here? Regards, Jarek P. -- 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
