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Article #2617Re: ELXSI System 6400 .... Information needed
From: Chris Thomson
Date: Sat, 21 Jun 1986 23:21
Date: Sat, 21 Jun 1986 23:21
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> > a 10 processor test at Sandia Labs they got 10.1X the power of a single > > processor. > > This is an interesting trick. Does anyone have a clue about how they > got a greater than linear speedup? This was a cache effect. The program being run was almost perfectly parallelizable (how's that for a word?), with almost no synchronization overhead (a linear algebra problem, I think). Thus its total data motion on 10 processors was very nearly the same as on 1 processor, but there was 10 times as much cache available, hence the 10.1 times speedup. The result is hardly a general one, but does speak well of the machine's overall ability to multiprocess. -- Chris Thomson, Myrias Research Corporation ihnp4!alberta!myrias!cmt 200 10328 81 Ave, Edmonton Alberta, Canada 403 432 1616
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!cbosgd!ihnp4!alberta!myrias!cmt From: cmt@myrias.UUCP (Chris Thomson) Newsgroups: net.arch,net.unix Subject: Re: ELXSI System 6400 .... Information needed Message-ID: <253@myrias.UUCP> Date: Sat, 21-Jun-86 19:21:12 EDT Article-I.D.: myrias.253 Posted: Sat Jun 21 19:21:12 1986 Date-Received: Mon, 23-Jun-86 01:19:12 EDT References: <203@cybavax.UUCP> <1946@calmasd.CALMA.UUCP> <120@portal.UUcp> Organization: Myrias Research, Edmonton Lines: 16