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From: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
To: Chris Friesen <cfriesen@nortel.com>
Cc: linux-kernel@vger.kernel.org, libc-hacker@sources.redhat.com,
	libc-alpha@sources.redhat.com
Subject: Re: [ANN] Userspace M-on-N threading model implementation. Alpha release.
Date: Tue, 30 Jan 2007 12:46:09 +0300	[thread overview]
Message-ID: <20070130094609.GB2455@2ka.mipt.ru> (raw)
In-Reply-To: <45BE238A.9060103@nortel.com>

On Mon, Jan 29, 2007 at 10:40:42AM -0600, Chris Friesen (cfriesen@nortel.com) wrote:
> Evgeniy Polyakov wrote:
> >Hello.
> >
> >I'm pleased to announce initial userspace M-on-N threading model
> >implementation (for hackers) called NTL. 
> 
> If you haven't already, I suggest you look into the story of NGPT and 
> also read the NPTL white paper 
> (http://people.redhat.com/drepper/nptl-design.pdf) especially section 
> 5.1 describing why they went with a 1:1 model.

Of course I read this, but it does not change anything.

NGPT had 2 times slower start time than NPTL, and NTL has 2-20 times
faster than NPTL, so I think NGPT had too major problems to get it 
into comparison.

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.

> Chris

-- 
	Evgeniy Polyakov

  reply	other threads:[~2007-01-30  9:47 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
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 [this message]
     [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
2007-01-30 21:16 Kaz Kylheku
2007-01-31  8:47 ` Evgeniy Polyakov
2007-02-02 16:12 ` Bill Davidsen
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

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