netdev - Re: [net-next.git 4/7] stmmac: add Rx watchdog optimization to mitigate the DMA irqs

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Message-ID: <1346861675.5325.13.camel@bwh-desktop.uk.solarflarecom.com>
Date:	Wed, 5 Sep 2012 17:14:35 +0100
From:	Ben Hutchings <bhutchings@...arflare.com>
To:	Giuseppe CAVALLARO <peppe.cavallaro@...com>
CC:	<netdev@...r.kernel.org>, <davem@...emloft.net>
Subject: Re: [net-next.git 4/7] stmmac: add Rx watchdog optimization to
 mitigate the DMA irqs

On Wed, 2012-09-05 at 17:03 +0200, Giuseppe CAVALLARO wrote:
> GMAC devices newer than databook 3.50 has an embedded timer
> that can be used for mitigating the number of interrupts.
> So this patch adds this optimizations.
> Old MAC will continue to use NAPI.
[...]

Interrupt moderation is *not* a substitute for NAPI; you should continue
using NAPI as well.

Ben.

-- 
Ben Hutchings, Staff Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.

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