From owner-freebsd-scsi Wed Mar 31 23:20: 3 1999 Delivered-To: freebsd-scsi@freebsd.org Received: from allegro.lemis.com (allegro.lemis.com [192.109.197.134]) by hub.freebsd.org (Postfix) with ESMTP id 4A4D91516C; Wed, 31 Mar 1999 23:19:56 -0800 (PST) (envelope-from grog@freebie.lemis.com) Received: from freebie.lemis.com (freebie.lemis.com [192.109.197.137]) by allegro.lemis.com (8.9.1/8.9.0) with ESMTP id QAA11084; Thu, 1 Apr 1999 16:49:36 +0930 (CST) Received: (from grog@localhost) by freebie.lemis.com (8.9.3/8.9.0) id QAA91354; Thu, 1 Apr 1999 16:49:35 +0930 (CST) Message-ID: <19990401164935.Z413@lemis.com> Date: Thu, 1 Apr 1999 16:49:35 +0930 From: Greg Lehey To: Matthew Dillon Cc: FreeBSD Hackers , FreeBSD SCSI Mailing List Subject: Re: CCD and Vinum compared with new performance measuring tool References: <19990401122922.Q413@lemis.com> <199904010717.XAA53772@apollo.backplane.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.93.2i In-Reply-To: <199904010717.XAA53772@apollo.backplane.com>; from Matthew Dillon on Wed, Mar 31, 1999 at 11:17:02PM -0800 WWW-Home-Page: http://www.lemis.com/~grog Organization: LEMIS, PO Box 460, Echunga SA 5153, Australia Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-41-739-7062 Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Wednesday, 31 March 1999 at 23:17:02 -0800, Matthew Dillon wrote: >> >> In the past few weeks, I've been bitching about the fact that bonnie >> doesn't do what I want in measuring storage device performance. I've >> now solved the problem: I've written another program. You can pick it >> up at ftp://ftp.lemis.com/pub/rawio.tar.gz. From the man page: >> >> DESCRIPTION >> rawio tests the speed of the low-level character I/O device special in a >> concurrent environment. It is intended for comparisons of storage de- >> .. > > Just a quick side note: There are known performance problems with the > new getnewbuf() in -4.x. These problems have been solved, but not yet > committed. Thanks for the info. I've noticed that the individual subprocesses tend to run at very different speeds. Does it have anything to do with that? Greg -- See complete headers for address, home page and phone numbers finger grog@lemis.com for PGP public key To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message