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- Newsgroups: comp.sys.sgi.misc
- Path: sparky!uunet!cs.utexas.edu!swrinde!sdd.hp.com!ncr-sd!crash!photon.photon.com!jhp
- From: jhp@photon.com (Jim Patterson)
- Subject: Re: Where does the CPU go, when its not doing nuthin' (gr_osview)
- Message-ID: <1992Dec31.000257.19671@photon.com>
- Sender: usenet@photon.com (Usenet dummy users)
- Reply-To: jhp@photon.com
- Organization: Photon Research Associates, Inc.
- X-Newsreader: TIN [version 1.1 PL6]
- References: <1hsmkiINNf05@rave.larc.nasa.gov>
- Date: Thu, 31 Dec 1992 00:02:57 GMT
- Lines: 19
-
- : I have been running a structural analysis finite element code on a 4d35 with
- : similar problems. I was the only user on the machine but could get no more
- : than about 60% of the CPU. I too attributed this to disk accesses but when
- : we upgraded our memory from 16mb to 48mb, I found that I could get about 95%
- : of the CPU!
- : I wonder if Dave Olson could explain that?
-
- Your process was too big for physical memory, so it was doing a lot of
- swapping to disk. Once you got enough memory you didn't need to swap
- and the disk access went away (and the process worked a lot faster)
-
- Jim
-
-
- --
- James Patterson photon!jhp@ucsd.edu jhp@photon.com
- Photon Research Associates 619-455-9741 (voice) 619-546-3903 (fax)
- "... three great virtues of a programmer: laziness,impatience and hubris "
- Larry Wall in _Programming Perl_
-