linux-kernel - Re: Performance degradation measurement [was Re: [PATCH 06/37] Security: Separate task security context from task

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Message-ID: <25920.1206249437@turing-police.cc.vt.edu>
Date:	Sun, 23 Mar 2008 01:17:17 -0400
From:	Valdis.Kletnieks@...edu
To:	David Howells <dhowells@...hat.com>
Cc:	akpm@...ux-foundation.org, torvalds@...l.org,
	Trond.Myklebust@...app.com, chuck.lever@...cle.com,
	nfsv4@...ux-nfs.org, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, selinux@...ho.nsa.gov,
	linux-security-module@...r.kernel.org
Subject: Re: Performance degradation measurement [was Re: [PATCH 06/37] Security: Separate task security context from task_struct [ver #34]]

On Wed, 19 Mar 2008 17:12:08 -0000, David Howells said:

(Sorry - finally catching up)

>  (1) SELinux enabled, none of the security patches:
> 
> 	(gdb) p (1.119+1.110+1.104+1.106+1.095+1.112+1.094+1.091+1.112)/9
> 	$3 = 1.104777777777777

>  (4) LSM/SELinux disabled, none of the security patches:
> 
> 	(gdb) p (1.121+1.136+1.137+1.121+1.122+1.131+1.121+1.131+1.118)/9
> 	$7 = 1.1264444444444437

What's up with *that*?  The *fastest* run with it disabled is 1.118, and
the *slowest* with it enabled is 1.119.  At that point, I have to wonder
what we're really measuring here....

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