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Message-ID: <20070130094609.GB2455@2ka.mipt.ru> Date: Tue, 30 Jan 2007 12:46:09 +0300 From: Evgeniy Polyakov <johnpol@....mipt.ru> To: Chris Friesen <cfriesen@...tel.com> Cc: linux-kernel@...r.kernel.org, libc-hacker@...rces.redhat.com, libc-alpha@...rces.redhat.com Subject: Re: [ANN] Userspace M-on-N threading model implementation. Alpha release. On Mon, Jan 29, 2007 at 10:40:42AM -0600, Chris Friesen (cfriesen@...tel.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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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