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=unavailable autolearn_force=no version=3.4.4 Path: border1.nntp.dca1.giganews.com!nntp.giganews.com!usenet.blueworldhosting.com!feeder01.blueworldhosting.com!feeder.erje.net!eu.feeder.erje.net!eternal-september.org!feeder.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: "J-P. Rosen" Newsgroups: comp.lang.ada Subject: Re: can someone help me with this code (explanation) Date: Fri, 26 Sep 2014 16:49:14 +0200 Organization: A noiseless patient Spider Message-ID: References: <6e1f86e6-c17a-428e-bb19-460c5ba26c8a@googlegroups.com> <1ec7272d-de7f-43dd-be30-009c437011de@googlegroups.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit Injection-Date: Fri, 26 Sep 2014 14:49:17 +0000 (UTC) Injection-Info: mx05.eternal-september.org; posting-host="23dab0694e4174fdc880833ec67fa650"; logging-data="21766"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18KRxi8wVWGtxOaGMk0YF4y" User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.6.0 In-Reply-To: Cancel-Lock: sha1:ApMCYC1eNxlswn9PJqVKL2IeXv4= Xref: number.nntp.dca.giganews.com comp.lang.ada:189170 Date: 2014-09-26T16:49:14+02:00 List-Id: Le 26/09/2014 16:15, Björn Lundin a écrit : > http://www.sigada.org/conf/sa98/papers/mueller.pdf > > I did not read all of it, but the conclusion is that > context switches are bad for performance. > If a protected object can REPLACE a task, it > will show in measurements. (and they did measure) That's a paper from 16 years ago. Computers as well as compilers have evolved a lot, therefore I would not trust the paper for making a decision nowadays... -- J-P. Rosen Adalog 2 rue du Docteur Lombard, 92441 Issy-les-Moulineaux CEDEX Tel: +33 1 45 29 21 52, Fax: +33 1 45 29 25 00 http://www.adalog.fr