To: linux-kernel@vger.kernel.org
From: Bill Davidsen <davidsen@tmr.com>
Subject: Re: [ANN] Userspace M-on-N threading model implementation. Alpha
 release.
Date: Fri, 02 Feb 2007 11:12:02 -0500
Message-ID: <45C362D2.2040407@tmr.com>
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Kaz Kylheku wrote:
> Evgeniy Polyakov wrote:
>> I described in details why and how M:N model better, and its drawbacks
>> include all issues mentioned by Ulrich Drepper, but nevertheless its
>> advantages are far too superiour than those which can be
>> provided by 1:1
>> model.
> 
> M:N threading is an unnecessary performance hack that's needed by people
> who are living in a C or C++ exile away from some language that has
> lexical closures, generators or first-class continuations.

Yes, that's called the "real world." Arguments of the "I don't need it, 
in a perfect world you wouldn't either, therefore it's a bad idea" type 
simply contribute nothing.

Because user threading can avoid context switches, there will always be 
cases where it will outperform o/s threads for hardware reasons.

-- 
Bill Davidsen <davidsen@tmr.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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