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- From: walter@zarquon.Eng.Sun.COM (Walter Bays)
- Newsgroups: comp.benchmarks
- Subject: Re: specint, specfloat, mips...
- Message-ID: <lmdjtrINNsc7@exodus.Eng.Sun.COM>
- Date: 27 Jan 93 18:08:59 GMT
- References: <1993Jan27.162837.23823@cenaath.cena.dgac.fr>
- Reply-To: walter@zarquon.Eng.Sun.COM
- Organization: Sun Microsystems, Inc.
- Lines: 37
- NNTP-Posting-Host: zarquon
-
- In article 23823@cenaath.cena.dgac.fr, brasseur@stna.dgac.fr (Christophe Le Brasseur CAP SESA TERTIAIRE AG25) writes:
- >Here are a few questions :
- >==========================
- >
- >What exactly are specint and specfloat ?
- >How can you compare spec to mips ?
-
- I am emailing you the SPEC FAQ for this group, which may help you.
-
- >We already made simulation of the system on sparc 10/30 and on Bull DPX2/360 >Bi-processor (a french computer with two 25Mhz 68040).
-
- This is the best answer. Nothing represents your own code better than
- your own code. You can use SPECint92 and SPECfp92 to get an idea of
- CPU speed to decide which machines to test with your code.
-
- >We looked at Sparc 10/52 and at RS6000. ...
- >We can also get a DPX2/380 with 4 processors (33 Mhz 68040) : 100 Mips (!?)
-
- Your description of the workload sounds multi-user and multi-threaded,
- so you can use SPECrate_int92 and SPECrate_fp92 to rate overall system
- compute capacity. (See FAQ for the difference between the speed and
- capacity measures.)
-
- >So the point is : does my appplication use a lot of specints or a lot of specfloat ?
-
- After running your code, the next best answer is to look at the
- descriptions of the individual SPEC benchmarks and match them with your
- application. Then look at the SPECrates of those benchmarks most like
- your application. Finally you can make your own measurements or seek
- advice on how much integer code is executed versus floating point code,
- but also consider the source of the advice. (I won't offer any here :-)
-
- ---
- Speaking for myself, not for Sun nor for SPEC...
- Walter Bays walter.bays@eng.sun.com
- Sun Microsystems, 2550 Garcia Ave., MTV15-404, Mountain View, CA 94043
- (415) 336-3689 SPEC Steering Committee Chairman FAX (415) 968-4873
-