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Re: [Patch 3/3 2.4] e1000: Update Documentation/networking/e1000.txt

To: netdev@xxxxxxxxxxx
Subject: Re: [Patch 3/3 2.4] e1000: Update Documentation/networking/e1000.txt
From: Jason Lunz <lunz@xxxxxxxxxxxx>
Date: Fri, 15 Oct 2004 19:03:23 +0000 (UTC)
Organization: PBR Streetgang
References: <Pine.LNX.4.44.0410150507590.31227-100000@xxxxxxxxxxxxxxxxxxxx>
Sender: netdev-bounce@xxxxxxxxxxx
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ganesh.venkatesan@xxxxxxxxx said:
> +          This sets the InterruptThrottleRate to 3000 interrupts/sec for the 
> +          first, second, and third instances of the driver. The range of 
> 2000 to 
> +          3000 interrupts per second works on a majority of systems and is a 
> +          good starting point, but the optimal value will be 
> platform-specific. 
> +          If CPU utilization is not a concern, use RX_POLLING (NAPI) and 
> default 
> +          driver settings.

I don't understand this bit. Isn't the point of NAPI to disable rx
interrupts entirely, and only gather as many frames from the driver as
CPU time permits? That's supposed to limit network-rx CPU usage, not
increase it as the above paragraph implies.

Jason


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