From owner-freebsd-current@FreeBSD.ORG Sun Dec 26 06:30:13 2004 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id D512D16A4CE for ; Sun, 26 Dec 2004 06:30:13 +0000 (GMT) Received: from pimout2-ext.prodigy.net (pimout2-ext.prodigy.net [207.115.63.101]) by mx1.FreeBSD.org (Postfix) with ESMTP id 591BD43D1D for ; Sun, 26 Dec 2004 06:30:11 +0000 (GMT) (envelope-from julian@elischer.org) Received: from [192.168.1.102] (adsl-216-100-134-143.dsl.snfc21.pacbell.net [216.100.134.143])iBQ6U2Gr257776; Sun, 26 Dec 2004 01:30:07 -0500 Message-ID: <41CE5A6A.4090101@elischer.org> Date: Sat, 25 Dec 2004 22:30:02 -0800 From: Julian Elischer User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.8a3) Gecko/20041017 X-Accept-Language: en, hu MIME-Version: 1.0 To: Jeff Roberson References: <20041225191637.K60504@mail.chesapeake.net> In-Reply-To: <20041225191637.K60504@mail.chesapeake.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit cc: current@freebsd.org Subject: Re: schedgraph.py X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 26 Dec 2004 06:30:13 -0000 Jeff Roberson wrote: > I took a break from working on VFS to implement a tool that will help me > further refine the ULE scheduler. This may also be interesting in > understanding application behavior under load, analyzing lock contention > and preemption in the kernel, etc. > [...] robert watson has been doing some work in a similar (but not as detailed) vein. he has some code that produces some quite nice graphs of threads and cpus using KTR.