netdev - Re: bond + tc regression ?

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Message-Id: <200905061349.29805.denys@visp.net.lb>
Date:	Wed, 6 May 2009 13:49:29 +0300
From:	Denys Fedoryschenko <denys@...p.net.lb>
To:	Eric Dumazet <dada1@...mosbay.com>
Cc:	Vladimir Ivashchenko <hazard@...ncoudi.com>, netdev@...r.kernel.org
Subject: Re: bond + tc regression ?

On Wednesday 06 May 2009 13:41:25 Eric Dumazet wrote:
> You must do for example (to bind on CPU 0)
>
> echo 1 >/proc/irq/default_smp_affinity
>
> ifconfig eth1 down
> # IRQ of eth1 handled by CPU0 only
> echo 1 >/proc/irq/34/smp_affinity
> ifconfig eth1 up
>
> ifconfig eth0 down
> # IRQ of eth0 handled by CPU0 only
> echo 1 >/proc/irq/36/smp_affinity
> ifconfig eth0 up
I think better to use some method over ethtool, that will cause reset.
WHen you do down - you will loose default route, beware of that
>
>
> One thing to consider too is the BIOS option you might have, labeled
> "Adjacent Sector Prefetch"
>
> This basically tells your cpu to use 128 bytes cache lines, instead of 64
>
> In your forwarding worload, I believe this extra prefetch can slowdown your
> machine.
>
>
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