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

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Message-ID: <7e63f56c0612261151y7aa95954hb2a1d47ce130c38d@mail.gmail.com>
Date:	Tue, 26 Dec 2006 21:51:31 +0200
From:	"Robert Iakobashvili" <coroberti@...il.com>
To:	hadi@...erus.ca
Cc:	"Arjan van de Ven" <arjan@...radead.org>, netdev@...r.kernel.org
Subject: Re: Network card IRQ balancing with Intel 5000 series chipsets

On 12/26/06, jamal <hadi@...erus.ca> wrote:
>
> If you compile in PCI-E support you should have more control of the
> MSI-X, no? I would tie the MSI to a specific processor statically; my
> past experiences with any form of interupt balancing with network loads
> has been horrible.
>
> cheers,
> jamal

Thanks for the direction.

In meanwhile I have removed all userland processes from CPU0,
that handles network card interrupts and all packet-processing (kernel-space).

Still, it should be some way of CPU-scaling; even for the case of the
only network
card.


> > >
> > > it can still be done using the TPR (Thread Priority Register) of the
> > > APIC. It's just... not there in Linux (other OSes do use this).
> >
> > Have you any specific pointers for doing it (beyond Internet search)?
> > Your input would be very much appreciated.



-- 
Sincerely,
Robert Iakobashvili,
coroberti %x40 gmail %x2e com
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