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Date:      Tue, 13 Apr 1999 15:38:38 -0700 (PDT)
From:      John Polstra <jdp@polstra.com>
To:        Daniel Eischen <eischen@vigrid.com>
Cc:        current@FreeBSD.ORG
Subject:   Re: cvsup
Message-ID:  <XFMail.990413153838.jdp@polstra.com>
In-Reply-To: <199904132148.RAA13399@pcnet1.pcnet.com>

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Daniel Eischen wrote:

> Does Modula-3 use libc_r, or does it have it's own user thread support?

It has its own.  It can be ported to use native threads, but it's a
non-negligible amount of work.  It hardly seems worth it for the GUI
alone.

> The recent set of commits to libc_r changed the thread scheduling
> mechanism to use ITIMER_PROF instead of ITIMER_VIRTUAL.  This was
> to allow for fairer scheduling with I/O bound threads.

My hunch is that it's not a fairness issue.  It's just the fact that
when you block in disk I/O, the whole process (all threads) blocks.

John
---
  John Polstra                                               jdp@polstra.com
  John D. Polstra & Co., Inc.                        Seattle, Washington USA
  "Self-interest is the aphrodisiac of belief."           -- James V. DeLong



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