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,FREEMAIL_FROM autolearn=ham autolearn_force=no version=3.4.4 X-Google-Thread: 103376,ad4585f2971e47c5 X-Google-NewGroupId: yes X-Google-Attributes: gida07f3367d7,domainid0,public,usenet X-Google-Language: ENGLISH,ASCII Path: g2news2.google.com!postnews.google.com!e8g2000vbz.googlegroups.com!not-for-mail From: jonathan Newsgroups: comp.lang.ada Subject: Re: Need some light on using Ada or not Date: Sun, 20 Feb 2011 12:10:13 -0800 (PST) Organization: http://groups.google.com Message-ID: <73f1d7b1-98eb-436a-8f74-726ddf9c9407@e8g2000vbz.googlegroups.com> References: <4d5ef836$0$23753$14726298@news.sunsite.dk> <7ibvl6tn4os3njo3p4kek9kop44nke3n7t@4ax.com> <4d5fd57d$0$6992$9b4e6d93@newsspool4.arcor-online.net> <4D617036.4080902@obry.net> NNTP-Posting-Host: 143.117.23.233 Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Trace: posting.google.com 1298232613 4009 127.0.0.1 (20 Feb 2011 20:10:13 GMT) X-Complaints-To: groups-abuse@google.com NNTP-Posting-Date: Sun, 20 Feb 2011 20:10:13 +0000 (UTC) Complaints-To: groups-abuse@google.com Injection-Info: e8g2000vbz.googlegroups.com; posting-host=143.117.23.233; posting-account=Jzt5lQoAAAB4PhTgRLOPGuTLd_K1LY-C User-Agent: G2/1.0 X-HTTP-UserAgent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.0.19) Gecko/2010120923 Iceweasel/3.0.6 (Debian-3.0.6-3),gzip(gfe) Xref: g2news2.google.com comp.lang.ada:18466 Date: 2011-02-20T12:10:13-08:00 List-Id: On Feb 20, 7:57=A0pm, Brian Drummond wrote: > On Sun, 20 Feb 2011 20:49:10 +0100, Pascal Obry wrote: > >Jonathan, > > >> If you want a multi-core Ada version, this might be a good > >> place to break out the Annex E (distributed systems) approach. > > >I really don't see how a distributed application could run faster than a > >multi-threaded one on a single machine! So PolyORB is certainly not the > >solution to this problem. > > You are probably right ... unless PolyOrb performs better than the 100% o= verhead > (on this test case) imposed by the pthread library (which I think is how = Gnat > implements its tasking) > > - Brian. My preferred plan B would link to MPI, which distributes mpi-tasks over the available cores. I don't know if that will work either! J.