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: eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!feeder.eternal-september.org!paganini.bofh.team!weretis.net!feeder6.news.weretis.net!feeder.usenetexpress.com!feeder-in1.iad1.usenetexpress.com!border1.nntp.dca1.giganews.com!nntp.giganews.com!buffer1.nntp.dca1.giganews.com!buffer2.nntp.dca1.giganews.com!nntp.earthlink.com!news.earthlink.com.POSTED!not-for-mail NNTP-Posting-Date: Wed, 28 Mar 2018 13:50:23 -0500 From: Dennis Lee Bieber Newsgroups: comp.lang.ada Subject: Re: Large number of tasks slows down my program (using debian) - any fix? Date: Wed, 28 Mar 2018 14:49:55 -0400 Organization: IISS Elusive Unicorn Message-ID: References: <1aa8f536-250d-4bef-9392-4d936f916e5f@googlegroups.com> User-Agent: ForteAgent/8.00.32.1272 X-No-Archive: YES MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Usenet-Provider: http://www.giganews.com NNTP-Posting-Host: 108.73.118.85 X-Trace: sv3-cWTl2yUJB15/B5zlvueABW2jehxxZjTvnLVnVHLpnjZdYFvKuY52EJtHRWkVJJGemmEoYLqPdhG9If1!Abg9yJn4wJftnEU8Pg7r84EVAqYaAhIQYd8RdAoRdS249HDZJuIJck3yRpjb5j1GH/clJbHe2k76!uDzwtauICv7bV+VFDvNYZg+aV7M= X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.40 X-Original-Bytes: 2019 Xref: reader02.eternal-september.org comp.lang.ada:51241 Date: 2018-03-28T14:49:55-04:00 List-Id: On Wed, 28 Mar 2018 11:06:29 -0700 (PDT), reinert declaimed the following: >I use gnat on debian (latest version). Now I tried to initiate a large number of (access) tasks ( "t := new atask_type" ). When I try to start, say, 500 tasks, my program slows down whithout any apparent reason (before the tasks do anything). Well -- you are creating, at the OS level, 500 processes each with an associated stack (how large a stack is each receiving (I believe the common GNAT runtime delegates task management to the underlying OS -- unless one is running a custom runtime on bare-boards)? How much free memory did your OS have to give to those stacks). What does "top" show? (#tasks, Memory Free, Swap Used, and top CPU hogs) -- Wulfraed Dennis Lee Bieber AF6VN wlfraed@ix.netcom.com HTTP://wlfraed.home.netcom.com/