From owner-freebsd-hackers Thu Aug 15 22:41:21 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id WAA08400 for hackers-outgoing; Thu, 15 Aug 1996 22:41:21 -0700 (PDT) Received: from parkplace.cet.co.jp (parkplace.cet.co.jp [202.32.64.1]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id WAA08395 for ; Thu, 15 Aug 1996 22:41:18 -0700 (PDT) Received: from localhost (michaelh@localhost) by parkplace.cet.co.jp (8.7.5/CET-v2.1) with SMTP id FAA23802 for ; Fri, 16 Aug 1996 05:41:14 GMT Date: Fri, 16 Aug 1996 14:41:13 +0900 (JST) From: Michael Hancock To: FreeBSD Hackers Subject: Re: STREAM benchmark, (not streams) In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-hackers@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk This site has the benchmark, http://www.cs.virginia.edu/~mccalpin/ Here's what I got on the following hardware: Tyan Tempest II MB (Neptune based and slow) 32MB 60ns parity RAM 2 x 16MB simms P166 ------------------------------------------------------------- This system uses 8 bytes per DOUBLE PRECISION word. ------------------------------------------------------------- Array size = 1000000, Offset = 0 Total memory required = 22.9 MB. Each test is run 10 times, but only the *best* time for each is used. ------------------------------------------------------------- Your clock granularity/precision appears to be 7812 microseconds. Each test below will take on the order of 250000 microseconds. (= 32 clock ticks) Increase the size of the arrays if this shows that you are not getting at least 20 clock ticks per test. ------------------------------------------------------------- WARNING: The above is only a rough guideline. For best results, please be sure you know the precision of your system timer. ------------------------------------------------------------- Function Rate (MB/s) RMS time Min time Max time Assignment: 40.1569 0.4073 0.3984 0.4453 Scaling : 40.1569 0.4228 0.3984 0.5156 Summing : 49.5484 0.5183 0.4844 0.6094 SAXPYing : 49.5484 0.5247 0.4844 0.6328 I compiled it on FreeBSD Current. cc -O stream_d.c second_cpu.c -o stream_d -lm I'm curious to see some numbers from others, especially from people with Tyan Tomcat I or II motherboards. The Tomcat I was used in the recent BSDI web benchmarks. Regards, Mike Hancock