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Re: How to improve performance of 2.6 kernel

To: "Stuart Longland" <>, "kernel coder" <>
Subject: Re: How to improve performance of 2.6 kernel
From: "Kevin D. Kissell" <>
Date: Mon, 17 Oct 2005 17:19:31 +0200
Cc: <>
Original-recipient: rfc822;
References: <> <>
>kernel coder wrote:
>> I am also attaching the benchmarks I took for both the kernels. Is
>> there any way I can improve 2.6's performance? Thanks.
> Don't mean to nitpick... but do you think it wise to use a proprietry
>format like Microsoft Excel on a prodominantly Linux-user list? :-)
>Tab-delimited would probably be better for distribution on a mailing list.

There are 2D data plots that are hard to do as ASCII art. ;o)
It opened fine for me in Open Office - there was one set of graphs
that looked to be empty, but I couldn't tell if that was OO screwing
up or the way the spreadsheet went out.  But the raw data was
legible and troubling.

> How much slower are we talking here?  And in what regards?

Memory copy, network I/O, and disk I/O, by factors ranging from
about 10% to almost 50% - I'd say about 25% on the average.
If this can't be explained by a configuration error, we have a real
problem here, but if that's the case, I'm surprised no one has raised
a red flag earlier.


        Kevin K.

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