From owner-freebsd-hackers Thu Nov 20 19:46:03 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id TAA07660 for hackers-outgoing; Thu, 20 Nov 1997 19:46:03 -0800 (PST) (envelope-from owner-freebsd-hackers) Received: from misery.sdf.com (misery.sdf.com [204.244.210.193]) by hub.freebsd.org (8.8.7/8.8.7) with SMTP id TAA07655 for ; Thu, 20 Nov 1997 19:45:55 -0800 (PST) (envelope-from tom@sdf.com) Received: from tom by misery.sdf.com with smtp (Exim 1.73 #1) id 0xYjuG-0000K6-00; Thu, 20 Nov 1997 19:37:24 -0800 Date: Thu, 20 Nov 1997 19:37:22 -0800 (PST) From: Tom To: Chris Timmons cc: "John S. Dyson" , Jaye Mathisen , hackers@freebsd.org Subject: Re: Serious performance issue with 2.2.5-RELEASE In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@freebsd.org X-Loop: FreeBSD.org Precedence: bulk On Thu, 20 Nov 1997, Chris Timmons wrote: > > On around November 3, there was a thread here in -hackers of subject > "FreeBSD shines" that mentioned a semaphore benchmarking program: > > "If anyone wants the code (and results for other OSes) see > ftp://samba.anu.edu.au/pub/tridge/semspeed.c" > > Subsequent discussion pointed out that 2.2 was quite a bit faster than > 2.2.5. Maybe a look at semspeed.c will provide some suggestions about > where to look. I recall this comparison was only for semaphore operations, which no part of FreeBSD uses (only some apps use it), and the comparison was made between 2.2 and current, and current was found to be quite slow. Tom