From owner-freebsd-arch  Mon Nov 20 23:35:47 2000
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Date: Mon, 20 Nov 2000 23:35:34 -0800
From: Julian Elischer <julian@elischer.org>
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To: Daniel Eischen <eischen@vigrid.com>
Cc: Scott Hess <scott@avantgo.com>, jasone@FreeBSD.ORG,
	arch@FreeBSD.ORG, smp@FreeBSD.ORG
Subject: Re: Threads (KSE etc) comments
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Daniel Eischen wrote:

> 
> With 2 CPUs, you could have 2 KSEs within the KSEG.  Nothing changes
> except that the KSEG workload is spread across 2 KSEs running on
> different CPUs.  The quantum for the KSEG, regardless of whether
> there are 1 or more KSEs associated with it, remains the same
> (I would advocate a separate quantum in this case, but I think
> I'm outvoted on that front).

not entirely
I think a process using two KSEs in a KSEG should be charged for 2.

> 
> This is all for PTHREAD_SCOPE_PROCESS threads.  PTHREAD_SCOPE_SYSTEM
> threads will be bound to their own KSEG with one KSE.  These will
> act more like LinuxThreads; when one of these threads block in
> the kernel, another one will not be executed (because there are no
> other threads allocated for that KSEG/KSE by the threads library).

well, it WILL do the upcall but the UTS will respond with
"No new thread to schedule, please yield"

> 
> --
> Dan Eischen
> 
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-- 
      __--_|\  Julian Elischer
     /       \ julian@elischer.org
    (   OZ    ) World tour 2000
---> X_.---._/  presently in:  Budapest
            v


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