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Groups > comp.lang.c > #66488

Re: setjmp, longjmp, parser state, threads

From Ian Collins <ian-news@hotmail.com>
Newsgroups comp.lang.c
Subject Re: setjmp, longjmp, parser state, threads
Date 2015-07-28 22:14 +1200
Message-ID <d1p2vkFohsbU8@mid.individual.net> (permalink)
References <mp5uhv$b7c$1@speranza.aioe.org> <876155yymh.fsf@bsb.me.uk> <mp7fco$el5$1@speranza.aioe.org>

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Morten W. Petersen wrote:
>
> Short snippets of code are good for a theoretical understanding of
> something, but I think I understand threads well enough.  There is
> a small memory cost, some cost of context switching and managing
> threads, and working with large data sets can for example be slow
> because it is outside of the CPU cache.
>
> Is there anything else to consider using threads?

Synchronisation.

If you have a number of threads building a shared data structure (an XML 
DOM for example), contention for locks on that structure can be a real 
performance killer, especially if it contains many small nodes.
-- 
Ian Collins

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Thread

setjmp, longjmp, parser state, threads "Morten W. Petersen" <morphex@gmail.com> - 2015-07-27 20:50 +0200
  Re: setjmp, longjmp, parser state, threads Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-28 00:22 +0100
    Re: OT - XML Parallel Parsing, was [Re: setjmp, longjmp, parser state, threads] Jeff Higgins <jeff@invalid.invalid> - 2015-07-27 21:00 -0400
      Re: OT - XML Parallel Parsing, was [Re: setjmp, longjmp, parser state,   threads] Ian Collins <ian-news@hotmail.com> - 2015-07-28 13:57 +1200
        Re: OT - XML Parallel Parsing, was [Re: setjmp, longjmp, parser state,   threads] Jeff Higgins <jeff@invalid.invalid> - 2015-07-27 22:13 -0400
          Re: OT - XML Parallel Parsing, was [Re: setjmp, longjmp, parser state,     threads] Ian Collins <ian-news@hotmail.com> - 2015-07-28 17:12 +1200
            Re: OT - XML Parallel Parsing Jeff Higgins <jeff@invalid.invalid> - 2015-07-28 09:46 -0400
          Re: OT - XML Parallel Parsing, was [Re: setjmp, longjmp, parser state, threads] "Morten W. Petersen" <morphex@gmail.com> - 2015-07-28 10:07 +0200
            Re: OT - XML Parallel Parsing, was [Re: setjmp, longjmp, parser state, threads] raltbos@xs4all.nl (Richard Bos) - 2015-07-28 09:28 +0000
              Patents, was [Re: OT - XML Parallel Parsing, was [Re: setjmp, longjmp, parser state, threads]] "Morten W. Petersen" <morphex@gmail.com> - 2015-07-28 11:41 +0200
                Re: Patents, was [Re: OT - XML Parallel Parsing, was [Re: setjmp, longjmp, parser state, threads]] Stephen Sprunk <stephen@sprunk.org> - 2015-07-28 20:53 -0500
                Re: Patents, was [Re: OT - XML Parallel Parsing, was [Re: setjmp, longjmp, parser state, threads]] "Morten W. Petersen" <morphex@gmail.com> - 2015-07-29 05:15 +0200
                Re: Patents, was [Re: OT - XML Parallel Parsing, was [Re: setjmp, longjmp, parser state, threads]] Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2015-07-28 22:34 -0600
      Re: OT - XML Parallel Parsing, was [Re: setjmp, longjmp, parser state, threads] Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-28 03:06 +0100
    Re: setjmp, longjmp, parser state, threads "Morten W. Petersen" <morphex@gmail.com> - 2015-07-28 10:44 +0200
      Re: setjmp, longjmp, parser state, threads Ian Collins <ian-news@hotmail.com> - 2015-07-28 22:14 +1200
        Re: setjmp, longjmp, parser state, threads "Morten W. Petersen" <morphex@gmail.com> - 2015-07-28 15:17 +0200
      Re: setjmp, longjmp, parser state, threads Jeff Higgins <jeff@invalid.invalid> - 2015-07-28 08:35 -0400
      Re: setjmp, longjmp, parser state, threads James Kuyper <jameskuyper@verizon.net> - 2015-07-28 10:29 -0400
        Re: setjmp, longjmp, parser state, threads "Morten W. Petersen" <morphex@gmail.com> - 2015-07-28 16:39 +0200
  Re: setjmp, longjmp, parser state, threads jadill33@gmail.com - 2015-07-28 06:47 -0700
    Re: setjmp, longjmp, parser state, threads "Morten W. Petersen" <morphex@gmail.com> - 2015-07-28 16:56 +0200
      Re: setjmp, longjmp, parser state, threads Noob <root@127.0.0.1> - 2015-07-28 18:04 +0200
      Re: setjmp, longjmp, parser state, threads jadill33@gmail.com - 2015-07-28 10:53 -0700
        Re: setjmp, longjmp, parser state, threads "Morten W. Petersen" <morphex@gmail.com> - 2015-07-29 04:59 +0200
  Re: setjmp, longjmp, parser state, threads Bartc <bc@freeuk.com> - 2015-07-28 16:29 +0100

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