From dan-!at!-sage.pal.roche.com Wed Sep 24 13:26:22 1997 Received: from chub1.pal.roche.com for dan "-at-" sage.pal.roche.com by www.ccl.net (8.8.3/950822.1) id MAA08675; Wed, 24 Sep 1997 12:42:11 -0400 (EDT) Received: from sage.pal.roche.com (sage.syntex.com) by Roche.COM (PMDF V5.0-8 #15454) id <01IO0LH8A9PC000CK3 \\at// Roche.COM>; Wed, 24 Sep 1997 09:37:54 -0700 (PDT) Received: by sage.pal.roche.com (950413.SGI.8.6.12/951211.SGI.AUTO) id JAA09997; Wed, 24 Sep 1997 09:36:30 -0700 Date: Wed, 24 Sep 1997 09:36:30 -0700 From: dan;at;sage.pal.roche.com (Dr. Daniel L. Severance) Subject: Re: CCL:re: Perf. of Alpha vs. R10k In-reply-to: "Chuck (aka chazix), 508-493-1399 (DTN 223-1399)" <"CCL:re: Perf. of Alpha vs. R10k" |-at-| Roche.COM> (Sep 23, 3:43pm) To: "Chuck (aka chazix), 508-493-1399 (DTN 223-1399)" Cc: chemistry*- at -*www.ccl.net Message-id: <9709240936.ZM9995 %-% at %-% sage.pal.roche.com> MIME-version: 1.0 X-Mailer: Z-Mail (3.2.3 08feb96 MediaMail) Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7BIT References: <9709231921.AA22916#* at *#us8rmc.bb.dec.com> On Sep 23, 3:43pm, Chuck (aka chazix), 508-493-1399 (DTN 223-1399) wrote: > Subject: CCL:re: Perf. of Alpha vs. R10k > > I don't follow this forum, but a colleague forwarded Dr. van der Spoel's > notes. Was the Fortran code that was posted (routine FORLJC, with a test > harness) the same code that produced a timing of 31 seconds on a 400MHz > Alpha? > On my system, it runs in less than 4 seconds, either with the options > Dr. van der Spoel gave, or with just "f90 -fast -tune host -non_shared". Hi, It runs in 1.3 seconds on an Indigo2 R10K machine (1 MB cache) with -Ofast, or 1.8 seconds using the compile options listed. His 30 second time was presumably for the whole program. It sounds like the R10K SGI machines are still significantly faster than the alpha machines even with the test code. The R10K chips were a BIG jump in performance over the previous R4xxx series from SGI, so this isn't that far from possibility. Take care, Dan -- Dr. Daniel L. Severance dan -8 at 8- sage.syntex.com ***************** Research Scientist Work phone:(650) 354-7509 Note the Change Roche Bioscience (Syntex) Fax (Work):(650) 852-1875 in area code! R6W-201, 3401 Hillview Ave Palo Alto, CA 94304 *****************