From owner-freebsd-hackers Fri Jun 2 11:27:03 1995 Return-Path: hackers-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.10/8.6.6) id LAA23921 for hackers-outgoing; Fri, 2 Jun 1995 11:27:03 -0700 Received: from crh.cl.msu.edu (crh.cl.msu.edu [35.8.1.24]) by freefall.cdrom.com (8.6.10/8.6.6) with SMTP id LAA23909 for ; Fri, 2 Jun 1995 11:26:56 -0700 Message-Id: <199506021826.LAA23909@freefall.cdrom.com> Received: by crh.cl.msu.edu (1.38.193.4/16.2) id AA22986; Fri, 2 Jun 1995 14:26:32 -0400 From: Charles Henrich Subject: Re: A performance mystery To: rgrimes@gndrsh.aac.dev.com (Rodney W. Grimes) Date: Fri, 2 Jun 1995 14:26:32 -0400 (EDT) Cc: henrich@crh.cl.msu.edu, freebsd-hackers@freebsd.org In-Reply-To: <199506021824.LAA07817@gndrsh.aac.dev.com> from "Rodney W. Grimes" at Jun 2, 95 11:24:45 am X-Mailer: ELM [version 2.4 PL23] Content-Type: text Content-Length: 530 Sender: hackers-owner@freebsd.org Precedence: bulk > Okay, try a memory bandwidth benchmark to see if we have something there > that is grossly different. A quick and easy bcopy test is to run iozone > that does not remove the temp file on a 1/4 memory size file repeatedly, > that should hit the buffer cache totatally and give us ~ bcopy rates. The ram-speed test posted here a couple of weeks ago gives: Micon: 10mb/20mb Compaq: 10mb/7mb -Crh Charles Henrich Michigan State University henrich@crh.cl.msu.edu http://rs560.msu.edu/~henrich/