From owner-freebsd-current@FreeBSD.ORG  Sat Jul  5 00:36:09 2003
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
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 D718437B401
	for <freebsd-current@freebsd.org>;
	Sat,  5 Jul 2003 00:36:09 -0700 (PDT)
Received: from smtp017.mail.yahoo.com (smtp017.mail.yahoo.com
	[216.136.174.114])
	by mx1.FreeBSD.org (Postfix) with SMTP id 6076043FFB
	for <freebsd-current@freebsd.org>;
	Sat,  5 Jul 2003 00:36:08 -0700 (PDT)
	(envelope-from kaeru@pd.jaring.my)
Received: from unknown (HELO ?219.95.56.232?) (khairil?yusof@219.95.56.232
	with plain)
	by smtp.mail.vip.sc5.yahoo.com with SMTP; 5 Jul 2003 07:36:07 -0000
From: Khairil Yusof <kaeru@pd.jaring.my>
To: Jeff Roberson <jroberson@chesapeake.net>
In-Reply-To: <20030704045443.J17881-100000@mail.chesapeake.net>
References: <20030704045443.J17881-100000@mail.chesapeake.net>
Content-Type: text/plain
Message-Id: <1057390562.799.17.camel@daemon.home.net>
Mime-Version: 1.0
X-Mailer: Ximian Evolution 1.4.0 
Date: 05 Jul 2003 15:36:03 +0800
Content-Transfer-Encoding: 7bit
cc: freebsd-current@freebsd.org
Subject: Re: Panic in scheduler code with SCHED_ULE during boot to
	multi-user.
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 05 Jul 2003 07:36:10 -0000

On Fri, 2003-07-04 at 16:55, Jeff Roberson wrote:
> Excellent debugging.  Can you tell me whats in kseq_cpu[0] and
> kseq_cpu[1]?  I think I may know what the problem is.  Do you have some
> negative niced processes or some positive nice processes?

Just tried the fix, and tried out ULE with KSE (universal map). In
single user mode, it works great (build world -j8) but it has
performance problems  once I get into multiuser mode where there are
background processes.

Basically everything just slows down and becomes jerky, and some idle
processes are pegging idle cycles on one CPU. It is still jerky even
when I kill them and load drops (ie. 0.1% user).

Can you tell me what info you need, for me to help find out what is
causing background processes to have such an adverse affect on
performance with KSE?