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Date:      Thu, 05 Sep 2002 18:37:21 -0700
From:      Terry Lambert <tlambert2@mindspring.com>
To:        Andrew Gallatin <gallatin@cs.duke.edu>
Cc:        John Baldwin <jhb@FreeBSD.ORG>, freebsd-alpha@FreeBSD.ORG
Subject:   Re: ithread preemption
Message-ID:  <3D7806D1.C87A9A6A@mindspring.com>
References:  <15735.47204.905352.900631@grasshopper.cs.duke.edu> <XFMail.20020905160700.jhb@FreeBSD.org> <15735.47756.501169.199225@grasshopper.cs.duke.edu>

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Andrew Gallatin wrote:
> John Baldwin writes:
>  > Solaris doesn't run on alpha, but it also a bit different in its approach.
>  > I do wonder if there is a way we can violate an assumption in PAL due to
>  > migration though.  That is, a thread could return to PAL on a different
>  > CPU than the one the interrupt was originally sent to.  This might explain
>  > why only SMP has problems.
>  >
> 
> Hey ... I think you have it on the nose!   That makes the most sense
> I've heard yet.
> 
> Do we have any way to bind a thread to a cpu?

Alfred has some patches.

IMO, threads should not be so bound to a CPU, as a migration event
should be an exception, rather than the rule, and always handled
by the scheduler.

-- Terry

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