From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham autolearn_force=no version=3.4.4 X-Google-Thread: 103376,27eba2f78fbdcc60 X-Google-Attributes: gid103376,public X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news1.google.com!news1.google.com!newsread.com!newsprint.newsread.com!newsfeed.stueberl.de!teaser.fr!news.wanadoo.fr!news.wanadoo.fr!not-for-mail Sender: obry@PASCAL Newsgroups: comp.lang.ada Subject: Re: Gnat 3.15p & Windows & Hyperthreading Q References: <1IOdnWpX0_s6MdnfRVn-3A@comcast.com> From: Pascal Obry Date: 26 Mar 2005 10:41:54 +0100 Message-ID: Organization: Home - http://www.obry.net User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii NNTP-Posting-Date: 26 Mar 2005 10:41:57 CET NNTP-Posting-Host: 82.120.25.102 X-Trace: 1111830117 news.wanadoo.fr 1207 82.120.25.102:2929 X-Complaints-To: abuse@wanadoo.fr Xref: g2news1.google.com comp.lang.ada:10021 Date: 2005-03-26T10:41:57+01:00 List-Id: tmoran@acm.org writes: > I'm told that a multitask program compiled with Gnat 3.15p and run > under Windows XP Pro on a hyperthreaded machine, runs in the same total > time as the same program using a single task. OTOH, when compiled with I don't think it is true. GNAT maps tasks to OS threads, so it could be a problem with the Windows XP used on the dual processor. Some WinXP (could be the case for the Home Edition) does not support multiproc. Pascal. -- --|------------------------------------------------------ --| Pascal Obry Team-Ada Member --| 45, rue Gabriel Peri - 78114 Magny Les Hameaux FRANCE --|------------------------------------------------------ --| http://www.obry.org --| "The best way to travel is by means of imagination" --| --| gpg --keyserver wwwkeys.pgp.net --recv-key C1082595