netdev - Re: Network card IRQ balancing with Intel 5000 series chipsets

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Message-ID: <459A9D24.8000807@hp.com>
Date:	Tue, 02 Jan 2007 09:57:56 -0800
From:	Rick Jones <rick.jones2@...com>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	hadi@...erus.ca, Robert Iakobashvili <coroberti@...il.com>,
	netdev@...r.kernel.org
Subject: Re: Network card IRQ balancing with Intel 5000 series chipsets

>>With NAPI, if i have a few interupts it likely implies i have a huge
>>network load (and therefore CPU use) and would be much more happier if
>>you didnt start moving more interupt load to that already loaded CPU....
> 
> 
> current irqbalance accounts for napi by using the number of packets as
> indicator for load, not the number of interrupts. (for network
> interrupts obviously)

And hopefully some knowledge of NUMA so it doesn't "balance" the 
interrupts of a NIC to some far-off (topology-wise) CPU...

rick jones
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