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From: Marek Kierdelewicz <marek@piasta.pl>
To: lartc@vger.kernel.org
Subject: Re: [LARTC] Intel or AMD is better processor for router (800+ users)
Date: Sat, 14 Oct 2006 11:46:57 +0000	[thread overview]
Message-ID: <20061014134657.1ca38db8@localhost.localdomain> (raw)
In-Reply-To: <20061004190542.02D884B321C@poczta.interia.pl>


> The author highly recommends disabling IRQ balancing in the kernel 
> config, but does not clarify what this does. I tried googling but
> didn't find much info. What does it exactly do, and why is disabling
> it recommended/required?

I haven't seen irq balance option in kernels for some time now. 

> It seems to me, IRQ balancing does not allow to specify interrupts
> per device but assigns them automatically on the run, correct?

It seems so. As I mentioned earlier I havn't seen irq balance option in
recent kernels. Static irq2cpu assignment works well (even on HT
processors).

> While searching the web, I found reports about big performance
> increases in 3D rendering due to disabling the feature. Can this be
> true and why?

I don't have a clue. I can say one thing - static irq2cpu assignment
worx4me on linux routers hauling 400+kpps. Without it only one
core/processor would be used.

cheers,
Marek Kierdelewicz
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      parent reply	other threads:[~2006-10-14 11:46 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-10-04 19:05 [LARTC] Intel or AMD is better processor for router (800+ users) sAwAr
2006-10-06 11:38 ` Pasi Kärkkäinen
2006-10-06 11:54 ` Aleksander
2006-10-06 15:25 ` Marek Kierdelewicz
2006-10-10 19:58 ` Aleksander
2006-10-14 11:46 ` Marek Kierdelewicz [this message]

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