Article View: comp.sys.dec
Article #1698Is a Sun3/60 *really* Faster than a Vax3600?
From: R. J. Auletta
Date: Wed, 04 Jul 1990 03:33
Date: Wed, 04 Jul 1990 03:33
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I was trying to measure relative disk performance on a new disk drive on Sun3/60. So I tried cp'ing a 1.5Meg file on three machines. The csh time command reported the following numbers for a 3/60, Vax3600, Vax8530 all on local disks. 3/60 with 25Meg of Memory, one user. (Sun OS) 0.0u 0.8s 0:01 74% 8530 with about 60Meg of Memory, 25 users (Ultrix). 0.0u .7s :01 76% Vax3600, 16Meg of Memory, 1 user, but two inactive diskless VS2000 clients (no users logged on.) Drive is an RA82. (Ultrix) 0.0u 1.5s 0:07 20% The most striking difference is the percentage of CPU's cycles each cp used over the period it was active with the VAX3600 quite low. I would interpret this being due to a another CPU intensive process running, but nothing showed up with top or ps. Otherwise, if I read this right, the CPU is waiting on the RA82? My question is, is the combination of a VAX3600 and RA82 really that much of a dog, or is there someother explanation in our configuration? --Rich Auletta rauletta@gmuvax2.gmu.edu
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!pyrdc!gmu90x!gmuvax2!rauletta From: rauletta@gmuvax2.gmu.edu (R. J. Auletta) Newsgroups: comp.sys.dec,comp.unix.ultrix Subject: Is a Sun3/60 *really* Faster than a Vax3600? Keywords: Subject says it all Message-ID: <1759@gmuvax2.gmu.edu> Date: 4 Jul 90 03:33:40 GMT Followup-To: comp.sys.dec,comp.unix.ultrix Organization: George Mason Univ., Fairfax, Va. Lines: 36