From: John Heffner <jheffner@psc.edu>
To: "David S. Miller" <davem@davemloft.net>
Cc: netdev@oss.sgi.com
Subject: Re: [PATCH] TSO Reloaded
Date: Tue, 17 May 2005 22:51:53 -0400 [thread overview]
Message-ID: <0dd16bed0ea56242244bab0a7f1cf372@psc.edu> (raw)
In-Reply-To: <20050517.192829.71087792.davem@davemloft.net>
On May 17, 2005, at 10:28 PM, David S. Miller wrote:
> From: John Heffner <jheffner@psc.edu>
> Date: Tue, 17 May 2005 22:26:09 -0400
>
>> 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%
>
> Yeah, TSO Reloaded really stinks. :-)
>
> Try the "Super TSO" patch I just posted instead.
Interesting timing. :)
With the new patch I'm getting 78.0%.
-John
next prev parent reply other threads:[~2005-05-18 2:51 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-05 6:07 [PATCH] TSO Reloaded David S. Miller
2005-05-05 22:35 ` David S. Miller
2005-05-05 22:56 ` Jon Mason
[not found] ` <20050505154955.0dcb4b38.davem@davemloft.net>
2005-05-06 3:53 ` Jon Mason
2005-05-05 23:11 ` Anton Blanchard
2005-05-05 23:14 ` David S. Miller
2005-05-06 1:03 ` Anton Blanchard
2005-05-05 23:18 ` Nivedita Singhvi
2005-05-05 23:24 ` Stephen Hemminger
2005-05-05 23:16 ` David S. Miller
2005-05-06 3:20 ` Leonid Grossman
2005-05-06 3:30 ` David S. Miller
2005-05-06 14:09 ` Leonid Grossman
2005-05-06 4:36 ` Anton Blanchard
2005-05-06 5:45 ` Anton Blanchard
2005-05-06 6:13 ` David S. Miller
2005-05-06 7:10 ` Anton Blanchard
2005-05-06 8:19 ` David S. Miller
2005-05-06 8:36 ` Anton Blanchard
2005-05-18 2:26 ` John Heffner
2005-05-18 2:28 ` David S. Miller
2005-05-18 2:51 ` John Heffner [this message]
2005-05-18 3:00 ` David S. Miller
2005-05-18 3:47 ` John Heffner
2005-05-18 5:59 ` David S. Miller
2005-05-18 13:48 ` John Heffner
[not found] <20050506123411.7073cf15.davem@davemloft.net>
2005-05-07 4:48 ` Leonid Grossman
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