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Re: Please help with Threading

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From Dennis Lee Bieber <wlfraed@ix.netcom.com>
Subject Re: Please help with Threading
Date Sun, 19 May 2013 22:58:45 -0400
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On Mon, 20 May 2013 07:52:23 +1000, Chris Angelico <rosuav@gmail.com>
declaimed the following in gmane.comp.python.general:

> Incidentally, is the context-switch check the same as the check for
> interrupt signal raising KeyboardInterrupt? ISTR that was another
> "every N instructions" check.
>
	That I couldn't say -- it would be the obvious spot for the
interpreter to check some global flag, said flag perhaps being set by an
interrupt handler, signal bits, or whatever the underlying OS uses.

	OTOH, KeyboardInterrupt may be something passed up through the I/O
system and only checked when a thread performs I/O on stdin (which would
explain how number crunchers can be "unstoppable"). And in this case,
the invocation of the I/O triggers a context switch.

-- 
	Wulfraed                 Dennis Lee Bieber         AF6VN
        wlfraed@ix.netcom.com    HTTP://wlfraed.home.netcom.com/

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Thread

Please help with Threading Jurgens de Bruin <debruinjj@gmail.com> - 2013-05-18 01:58 -0700
  Re: Please help with Threading Peter Otten <__peter__@web.de> - 2013-05-18 11:09 +0200
    Re: Please help with Threading Jurgens de Bruin <debruinjj@gmail.com> - 2013-05-18 04:23 -0700
      Re: Please help with Threading Peter Otten <__peter__@web.de> - 2013-05-18 14:01 +0200
  Re: Please help with Threading Dave Angel <davea@davea.name> - 2013-05-18 09:55 -0400
  Re: Please help with Threading Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2013-05-18 15:28 -0400
  RE: Please help with Threading Carlos Nepomuceno <carlosnepomuceno@outlook.com> - 2013-05-19 03:02 +0300
  Re: Please help with Threading Chris Angelico <rosuav@gmail.com> - 2013-05-19 10:38 +1000
  Re: Please help with Threading Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2013-05-19 17:46 -0400
  Re: Please help with Threading Chris Angelico <rosuav@gmail.com> - 2013-05-20 07:52 +1000
  Re: Please help with Threading Dave Angel <davea@davea.name> - 2013-05-19 21:04 -0400
  Re: Please help with Threading Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2013-05-19 22:58 -0400
  Re: Please help with Threading Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2013-05-19 23:25 -0400
  Re: Please help with Threading Fábio Santos <fabiosantosart@gmail.com> - 2013-05-20 07:25 +0100
  Re: Please help with Threading Jurgens de Bruin <debruinjj@gmail.com> - 2013-06-02 18:47 -0700

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