linux-kernel - Re: [ANN] Userspace M-on-N threading model implementation. Alpha release.

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Message-ID: <45C63E30.4010106@tmr.com>
Date:	Sun, 04 Feb 2007 15:12:32 -0500
From:	Bill Davidsen <davidsen@....com>
To:	Arjan van de Ven <arjan@...radead.org>
CC:	linux-kernel@...r.kernel.org
Subject: Re: [ANN] Userspace M-on-N threading model implementation. Alpha
   release.

Arjan van de Ven wrote:
>> Because user threading can avoid context switches, there will always be 
>> cases where it will outperform o/s threads for hardware reasons.
> 
> actually.. switching from one "real" thread to another in Linux is not
> an actual context switch in the hardware sense... at least this part of
> your argument seems to be incorrect ;)
> 
How does that work? Switching between kernel threads requires going into 
the kernel, user level thread switches are all done in user mode.

Do you have some way to change o/s threads w/o going into the kernel?

-- 
Bill Davidsen <davidsen@....com>
   "We have more to fear from the bungling of the incompetent than from
the machinations of the wicked."  - from Slashdot
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