From: "Kok, Auke" <auke-jan.h.kok@intel.com>
To: Arnaldo Carvalho de Melo <acme@redhat.com>,
Jeba Anandhan <jeba.anandhan@vaioni.com>,
Eric Dumazet <dada1@cosmosbay.com>,
netdev@vger.kernel.org, matthew.hattersley@vaioni.com
Subject: Re: SMP code / network stack
Date: Thu, 10 Jan 2008 10:31:58 -0800 [thread overview]
Message-ID: <4786649E.60502@intel.com> (raw)
In-Reply-To: <20080110174657.GL22437@ghostprotocols.net>
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
prev parent reply other threads:[~2008-01-10 18:32 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-10 14:05 SMP code / network stack Jeba Anandhan
2008-01-10 14:45 ` Eric Dumazet
2008-01-10 15:26 ` Jeba Anandhan
2008-01-10 17:46 ` Arnaldo Carvalho de Melo
2008-01-10 18:31 ` Kok, Auke [this message]
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