Em Thu, Jan 10, 2008 at 03:26:59PM +0000, Jeba Anandhan escreveu: > Hi Eric, > Thanks for the reply. I have one more doubt. For example, if we have 2 > processor and 4 ethernet cards. Only CPU0 does all work through 8 cards. > If we set the affinity to each ethernet card as CPU number, will it be > efficient?. > > Will this be default behavior? > > # cat /proc/interrupts > CPU0 CPU1 > 0: 11472559 74291833 IO-APIC-edge timer > 2: 0 0 XT-PIC cascade > 8: 0 1 IO-APIC-edge rtc > 81: 0 0 IO-APIC-level ohci_hcd > 97: 1830022231 847 IO-APIC-level ehci_hcd, eth0 > 97: 3830012232 847 IO-APIC-level ehci_hcd, eth1 > 97: 5830052231 847 IO-APIC-level ehci_hcd, eth2 > 97: 6830032213 847 IO-APIC-level ehci_hcd, eth3 > #sleep 10 > > # cat /proc/interrupts > CPU0 CPU1 > 0: 11472559 74291833 IO-APIC-edge timer > 2: 0 0 XT-PIC cascade > 8: 0 1 IO-APIC-edge rtc > 81: 0 0 IO-APIC-level ohci_hcd > 97: 2031409801 847 IO-APIC-level ehci_hcd, eth0 > 97: 4813981390 847 IO-APIC-level ehci_hcd, eth1 > 97: 7123982139 847 IO-APIC-level ehci_hcd, eth2 > 97: 8030193010 847 IO-APIC-level ehci_hcd, eth3 > > > Instead of the above mentioned ,if we set the affinity for eth2 and > eth3. > the output will be > > # cat /proc/interrupts > CPU0 CPU1 > 0: 11472559 74291833 IO-APIC-edge timer > 2: 0 0 XT-PIC cascade > 8: 0 1 IO-APIC-edge rtc > 81: 0 0 IO-APIC-level ohci_hcd > 97: 1830022231 847 IO-APIC-level ehci_hcd, eth0 > 97: 3830012232 847 IO-APIC-level ehci_hcd, eth1 > 97: 5830052231 923 IO-APIC-level ehci_hcd, eth2 > 97: 6830032213 1230 IO-APIC-level ehci_hcd, eth3 > #sleep 10 > > # cat /proc/interrupts > CPU0 CPU1 > 0: 11472559 74291833 IO-APIC-edge timer > 2: 0 0 XT-PIC cascade > 8: 0 1 IO-APIC-edge rtc > 81: 0 0 IO-APIC-level ohci_hcd > 97: 2300022231 847 IO-APIC-level ehci_hcd, eth0 > 97: 4010212232 847 IO-APIC-level ehci_hcd, eth1 > 97: 5830052231 1847 IO-APIC-level ehci_hcd, eth2 > 97: 6830032213 2337 IO-APIC-level ehci_hcd, eth3 > > In this case, will the performance improves?.
ps ax | grep irqbalance tells what? If it is enabled please try: service irqbalance stop chkconfig irqbalance off Then reset the smp_affinity entries to ff so and try again. http://www.irqbalance.org/ - Arnaldo -- 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
