Date: Mon, 27 Nov 2000 16:39:48 -0800 From: Alfred Perlstein <bright@wintelcom.net> To: FengYue <fengyue@bluerose.windmoon.nu> Cc: David Petrou <dpetrou@cs.cmu.edu>, freebsd-hackers@FreeBSD.ORG Subject: Re: thread model questions Message-ID: <20001127163948.S8051@fw.wintelcom.net> In-Reply-To: <Pine.BSF.4.21.0011271609430.31540-100000@shell.unixbox.com>; from fengyue@bluerose.windmoon.nu on Mon, Nov 27, 2000 at 04:10:49PM -0800 References: <20001127150916.R8051@fw.wintelcom.net> <Pine.BSF.4.21.0011271609430.31540-100000@shell.unixbox.com>
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* FengYue <fengyue@bluerose.windmoon.nu> [001127 16:08] wrote: > > On Mon, 27 Nov 2000, Alfred Perlstein wrote: > > ->* David Petrou <dpetrou@cs.cmu.edu> [001127 14:41] wrote: > ->> thanks for the quick reply... > ->> > ->> > > 3. if preemptive, does that occur at user-level, or by the kernel? > ->> > > (and how costly is it?) > ->> > > ->> > It's a mix, and very cheap. > > I thought it's preemptive purely at user-level since the threads are > scheduled by thread lib at user-level only. No? What are you asking? Give a scenario and I'll explain what should happen. -- -Alfred Perlstein - [bright@wintelcom.net|alfred@freebsd.org] "I have the heart of a child; I keep it in a jar on my desk." To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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