Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!seismo!rutgers!ames!oliveb!pyramid!prls!mips!mash From: mash@mips.UUCP (John Mashey) Newsgroups: comp.arch,comp.org.usenix Subject: Re: Benchmarking, etc [really: bc benchmarks] Message-ID: <413@winchester.UUCP> Date: Thu, 21-May-87 23:12:39 EDT Article-I.D.: winchest.413 Posted: Thu May 21 23:12:39 1987 Date-Received: Sat, 23-May-87 14:42:16 EDT References: <324@dumbo.UUCP> <809@killer.UUCP> <2417@homxa.UUCP> Reply-To: mash@winchester.UUCP (John Mashey) Organization: MIPS Computer Systems, Sunnyvale, CA Lines: 18 Xref: mnetor comp.arch:1383 comp.org.usenix:206 In article <4329@nsc.nsc.com> grenley@nsc.UUCP (George Grenley) writes: >... >In article <826@rtech.UUCP> daveb@rtech.UUCP (Dave Brower) writes: >>At last winter's Uniforum, I went around to a number of booths trying to >>run the infamous >> /bin/time bc << ! >> 2^4096 >> ! A while back, I posted an analysis of this, either here, or in comp.sys.m68k. THIS IS NOT A VERY GOOD BENCHMARK: 97% of the cycles are in one funcion, in fact, in a piece of code that's on the order of 256 bytes. Even weirder, something like 40% of the cycles are in multiply and divide, i.e., this code's statistics are not remotely typical. -- -john mashey DISCLAIMER: UUCP: {decvax,ucbvax,ihnp4}!decwrl!mips!mash, DDD: 408-720-1700, x253 USPS: MIPS Computer Systems, 930 E. Arques, Sunnyvale, CA 94086