From owner-freebsd-alpha Fri Mar 30 2:35:25 2001 Delivered-To: freebsd-alpha@freebsd.org Received: from anchor-post-34.mail.demon.net (anchor-post-34.mail.demon.net [194.217.242.92]) by hub.freebsd.org (Postfix) with ESMTP id DE9A537B726 for ; Fri, 30 Mar 2001 02:35:21 -0800 (PST) (envelope-from dfr@nlsystems.com) Received: from [62.49.251.130] (helo=herring.nlsystems.com) by anchor-post-34.mail.demon.net with esmtp (Exim 2.12 #1) id 14iwFU-0004Nq-0Y; Fri, 30 Mar 2001 11:35:20 +0100 Received: from herring (herring [10.0.0.2]) by herring.nlsystems.com (8.11.2/8.11.2) with ESMTP id f2UAY5456654; Fri, 30 Mar 2001 11:34:05 +0100 (BST) (envelope-from dfr@nlsystems.com) Date: Fri, 30 Mar 2001 11:34:05 +0100 (BST) From: Doug Rabson To: Andrew Gallatin Cc: Subject: Re: do we care about performance yet? In-Reply-To: <15044.1867.943183.224703@grasshopper.cs.duke.edu> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-alpha@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Thu, 29 Mar 2001, Andrew Gallatin wrote: > > FWIW, I ran a make buildworld this evening on my UP1000 under iprobe, > as well as with the receive side of a netperf tcp stream. > > (for anybody who doesn't know what iprobe is, check out > http://www.cs.duke.edu/ari/iprobe) > > For the buildworld, the system spent about 40% of its time in kernel. > Roughly 50% of that was in various states of idleness. I've left full > reports at: > > http://www.cs.duke.edu/~gallatin/iprobe_current/ > > The "???NOT_FOUND" is userland code I didn't tell iprobe about. I think this is just showing a lot of contention for the Giant mutex (and probably some i/o waiting). Since we don't halt on idle, the cpu will spend a lot of time buzzlooping on runq_check. -- Doug Rabson Mail: dfr@nlsystems.com Phone: +44 20 8348 6160 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message