linux-kernel - Re: system call time increase when turning on CONFIG

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Date:	Fri, 02 Mar 2007 15:11:51 -0800
From:	Tim Chen <tim.c.chen@...ux.intel.com>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	linux-kernel@...r.kernel.org,
	Virtualization Mailing List <virtualization@...ts.osdl.org>
Subject: Re: system call time increase when turning on CONFIG_PARAVIRT

On Fri, 2007-03-02 at 13:54 -0800, Jeremy Fitzhardinge wrote:

> [ I assume you're talking about running on native hardware. ]
> 
That's correct.

> I haven't done any detailed measurements on what effect this will have,
> but it does bring the actual executed instruction stream much closer to
> the !CONFIG_PARAVIRT case, and so I would hope it would recover most or
> all of the performance loss you've noticed.
> 
I also hope that the performance can be recovered as this option could
enabled in distributions' kernels in future.

Tim
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