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Article #17515Re: Tweaking threads
From: Michael Kelly
Date: Wed, 12 Mar 2003 21:32
Date: Wed, 12 Mar 2003 21:32
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1784 bytes
On Wed, 12 Mar 2003 11:39:18 -0800, "Dennis Jones" <djones@nospam.com> wrote: >I seem to recall >reading something once which talked about the optimum number of simultaneous >threads per processor being somewhere around 3 or 4. Less than that, and >you are wasting processor time (assuming the threads go to sleep once in a >while); more than that, and your process actually begins to slow down (if >all of the threads are active at the same time) because of context >switching. I would tend to think this is old time info maybe valid on 286 machines or some other CPU with really clunky context switching(as in simulating rebooting the machine!) 4 threads/cpu? Man! You couldn't even bring up the Windows desktop! I think a Pentium can handle a few more than that. :) -- "Only choice is an oxymoron."
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 10cc67,47731b28ebfc1a3 X-Google-Attributes: gid10cc67,public X-Google-ArrivalTime: 2003-03-12 21:35:44 PST From: Michael Kelly <mkelly00@netzero.net> Newsgroups: borland.public.cppbuilder.nativeapi Subject: Re: Tweaking threads Date: Wed, 12 Mar 2003 16:32:05 -0500 Message-ID: <hq9v6vkjgup69jju5tdj5ltp9s72su9vlq@4ax.com> References: <3e6deb3f@newsgroups.borland.com> <3e6e2fb9@newsgroups.borland.com> <3e6f8ce5$1@newsgroups.borland.com> X-Newsreader: Forte Agent 1.92/32.572 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit NNTP-Posting-Host: 24.51.216.36 X-Trace: newsgroups.borland.com 1047504753 24.51.216.36 (12 Mar 2003 13:32:33 -0800) Lines: 23 Path: arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!sn-xit-02!sn-xit-04!sn-xit-06!sn-xit-08!supernews.com!newsfeed.wirehub.nl!news.kweb.on.ca!KWeb!newsgroups.borland.com!not-for-mail