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From: Bill Davidsen <davidsen@tmr.com>
To: linux-kernel@vger.kernel.org
Cc: libc-alpha@sources.redhat.com
Cc: linux-kernel@vger.kernel.org
Subject: Re: [ANN] Userspace M-on-N threading model implementation. Alpha release.
Date: Fri, 02 Feb 2007 11:12:02 -0500	[thread overview]
Message-ID: <45C362D2.2040407@tmr.com> (raw)
In-Reply-To: <66910A579C9312469A7DF9ADB54A8B7D5C2B90@exchange.ZeugmaSystems.local>

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


  parent reply	other threads:[~2007-02-02 16:12 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-01-30 21:16 Kaz Kylheku
2007-01-31  8:47 ` Evgeniy Polyakov
2007-02-02 16:12 ` Bill Davidsen [this message]
2007-02-03 15:26   ` Arjan van de Ven
2007-02-04 20:12     ` Bill Davidsen
2007-02-04 20:20       ` Jakub Jelinek
2007-02-04 21:42         ` Bill Davidsen
2007-02-05  6:14           ` Arjan van de Ven
2007-02-14 12:17           ` Pavel Machek
2007-02-04 22:52         ` Davide Libenzi
  -- strict thread matches above, loose matches on Subject: below --
2007-01-29 14:52 Evgeniy Polyakov
2007-01-29 14:57 ` Evgeniy Polyakov
2007-01-29 16:40 ` Chris Friesen
2007-01-30  9:46   ` Evgeniy Polyakov
     [not found] ` <40f323d00701290747y68c8e27ege824694bfa378f58@mail.gmail.com>
2007-01-30  1:18   ` Samuel Thibault
2007-01-30  9:53     ` Evgeniy Polyakov
2007-01-30 10:24       ` Samuel Thibault
2007-01-30 10:43         ` Evgeniy Polyakov
2007-02-01  4:28 ` Lee Revell
2007-02-01  7:09   ` Evgeniy Polyakov

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