linux-kernel - Re: Performance versus FreeBSD 7.0

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Date:	Thu, 6 Mar 2008 22:59:44 +0530
From:	"debian developer" <debiandev@...il.com>
To:	"Stephen Cuppett" <cuppett@...il.com>
Cc:	linux-kernel@...r.kernel.org, "Ingo Molnar" <mingo@...e.hu>,
	"Linus Torvalds" <torvalds@...ux-foundation.org>
Subject: Re: Performance versus FreeBSD 7.0

On Fri, Feb 29, 2008 at 7:08 PM, Stephen Cuppett <cuppett@...il.com> wrote:
> Not lobbing the first artillery shell by any means, but I saw this
>  bullet on the FreeBSD release announcement:
>
>  # Dramatic improvements in performance and SMP scalability shown by
>  various database and other benchmarks, in some cases showing peak
>  performance improvements as high as 350% over FreeBSD 6.X under normal
>  loads and 1500% at high loads. When compared with the best performing
>  Linux kernel (2.6.22 or 2.6.24) performance is 15% better. Results are
>  from benchmarks used to analyze and improve system performance,
>  results with your specific work load may vary. Some of the changes
>  that contribute to this improvement are:
>
>     * The 1:1 libthr threading model is now the default.
>     * Finer-grained IPC, networking, and scheduler locking.
>     * A major focus on optimizing the SMP architecture that was put in
>  place during the 5.x and 6.x branches.
>
>  Some benchmarks show linear scaling up to 8 CPUs. Many workloads see a
>  significant performance improvement with multicore systems.
>
>  The whole thing is available at:
>
>  http://www.freebsd.org/releases/7.0R/announce.html
>
>  However, their site is pretty scant on details about those benchmarks.
>   Was just curious if anybody on this list had any input or links on
>  the metrics, the hardware, the workloads, how was Linux or FreeBSD
>  tuned, knew more information, could point me to the stats....

The benchmarks are posted here

http://people.freebsd.org/~kris/scaling/7.0%20Preview.pdf

page no 17-20.

A funny quote on CFS from above (page 19)

"The new CFS scheduler in 2.6.23 is "Completely Fair"...to
FreeBSD" :)

good to see some competition at last :D
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