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Re: [PATCH net-drivers-2.6 5/6] e100: Performance optimizations to e100

from [Scott Feldman] [Permanent Link][Original]
To: "Brandeburg, Jesse" <jesse.brandeburg@xxxxxxxxx>
Subject: Re: [PATCH net-drivers-2.6 5/6] e100: Performance optimizations to e100 Tx Path
From: Scott Feldman <sfeldma@xxxxxxxxx>
Date: Thu, 21 Apr 2005 12:17:56 -0700
Cc: "Chilakala, Mallikarjuna" <mallikarjuna.chilakala@xxxxxxxxx>, "Venkatesan, Ganesh" <ganesh.venkatesan@xxxxxxxxx>, <netdev@xxxxxxxxxxx>
In-reply-to: <C925F8B43D79CC49ACD0601FB68FF50C03B1A474@orsmsx408>
References: <C925F8B43D79CC49ACD0601FB68FF50C03B1A474@orsmsx408>
Sender: netdev-bounce@xxxxxxxxxxx 

On Apr 21, 2005, at 11:59 AM, Brandeburg, Jesse wrote:

Where is this 256us delay coming from?

Turning off the 'I' bit allows the transmit interrupt moderation to come
on, and setting the cid (which was already set) to all 1's indicates the
max delay (256 us)

This makes sense. I forgot about the cid delay. I was afraid the "CPU Saver" microcode was coming back. Thanks Jesse.

-scott


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