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Re: [PATCH] TSO Reloaded

To: "David S. Miller" <davem@xxxxxxxxxxxxx>
Subject: Re: [PATCH] TSO Reloaded
From: John Heffner <jheffner@xxxxxxx>
Date: Tue, 17 May 2005 22:26:09 -0400
Cc: netdev@xxxxxxxxxxx
In-reply-to: <20050504230731.12be1bc3.davem@xxxxxxxxxxxxx>
References: <20050504230731.12be1bc3.davem@xxxxxxxxxxxxx>
Sender: netdev-bounce@xxxxxxxxxxx
Though it may be moot by now, I just ran some tests of my own with this patch. This was on a dual 2.4 GHz Xeon booted with a UP kernel, running iperf over an e1000 at a 1500 byte MTU. I measured idle CPU by running a process which sits in a gettimeofday() loop. Numbers are CPU utilization, all turned out +/- 1%.

No TSO:  86.6%
Old TSO: 61.0%
New TSO: 88.5%


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