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Date: Thu, 10 Jan 2008 10:31:58 -0800 From: "Kok, Auke" <auke-jan.h.kok@...el.com> To: Arnaldo Carvalho de Melo <acme@...hat.com>, Jeba Anandhan <jeba.anandhan@...oni.com>, Eric Dumazet <dada1@...mosbay.com>, netdev@...r.kernel.org, matthew.hattersley@...oni.com Subject: Re: SMP code / network stack Arnaldo Carvalho de Melo wrote: > 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 another thing to try: if you don't need usb2 support, remove the ehci_hcd module - this will give a slight less overhead servicing irq's in your system. I take it that you have no MSI support in these ethernet cards? Auke -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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