comp.lang.idl-pvwave archive - RDF feed
type: channel
description: Messages from Usenet group comp.lang.idl-pvwave, compiled by Paulo Penteado
items: Some benchmarks
items: Re: Some benchmarks

Some benchmarks
type: item
description: I noted the hoopla about benchmarks running on pentiums, SGI's, suns, and about every other machine, and I thought I would include some local machines for this list. This is running the TIME_TEST benchmark. SGI 4D/340S (4 CPU) 37.2 seconds {usual loaded-down state} 4D/310S (1 CPU) 39.9 {loaded} SGI Indy 17.7 {nobody} DECstation 5000/200 79.4 {nobody on} DEC Alpha (64 MB RAM) 13.3 {two other jobs} DEC Alpha (254 MB) 7.0 {nobody} The Alpha times seem to indicate this who procedure is heavily swap-dependent, which is not too big a surprise I suppose. The big SGI's aren't too revealing, as they are pretty loaded down and I didn't ever get a chance to try them otherwise. Regards, Brian
creator: uphlabh
date: 1995-04-19T07:00:00-00:00

Re: Some benchmarks
type: item
description: In Article <gurman-1904952039240001@arrowroot.gsfc.nasa.gov>, gurman@uvsp.gsfc.nasa.gov (Joseph B. Gurman) wrote: > <snip> > For what it's worth, with an unreleased beta version of IDL for the Power > Macintosh, we get: > > PowerMac 8100/80 48 Mbyte System 7.5.1 20.9 s > > Frankly, I think disk speed is a big factor in these, as the Power Mac figures > (test 23 = 7.38 s) shows in comparison to say, the 3000/600 running OSF/1 > (test 23 = 0.82 s). The OpenVMS systems also have extra overhead in disk > writing (test 23 = 2.53 s on the 3000/900, 6.95 s on the 4000/710), but > you supposedly get a more reliable file system in return. In fairness, the > PowerMac disk I/O is still done in emulation. > > Joe > > P.S. Bet our PowerMac cost less than your Indy, though.... It certainly > cost about a factor of 3 less than the DEC 3000/400. > > -- > Joseph B. Gurman / NASA Goddard Space Flight Center/ Solar Data Analysis Center / Code 682 / Greenbelt MD 20771 USA / gurman@uvsp.gsfc.nasa.gov > | Federal employees are still prohibited from holding opinions while at work. Any opinions expressed herein must therefore be someone else's. | Be aware that time_test for the Power Macs, and probably for a lot of other processors is dependent on more than just processor, raw memory, clock speed, and disk speed. I had an opportunity to try out IDL in a class on a Power Mac 6100 with 16 Mbytes of memory. Experimenting with time_test showed that it also depended on whether 1. It was run the first or latter time. On the first time you had additional disk accesses and compilation to deal with so that the second run was significantly faster. 2. The disk cache and program had adequate memory set aside (critical on a 16 Mbyte machine as the version of IDL reccomends 10 Mbytes + for IDL alone). If the cache was large enough, disk access was less of a problem. 3. Graphics were written to a buffer for updating. Without the buffer you had some problems with the appearance of windows ;-), but about t…
creator: clodius
date: 1995-04-25T07:00:00-00:00