From owner-freebsd-arch@FreeBSD.ORG  Fri Dec 23 22:58:03 2011
Return-Path: <owner-freebsd-arch@FreeBSD.ORG>
Delivered-To: arch@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 7F29D1065678;
	Fri, 23 Dec 2011 22:58:03 +0000 (UTC)
	(envelope-from julian@freebsd.org)
Received: from vps1.elischer.org (vps1.elischer.org [204.109.63.16])
	by mx1.freebsd.org (Postfix) with ESMTP id 190678FC16;
	Fri, 23 Dec 2011 22:58:02 +0000 (UTC)
Received: from julian-mac.elischer.org (c-67-180-24-15.hsd1.ca.comcast.net
	[67.180.24.15]) (authenticated bits=0)
	by vps1.elischer.org (8.14.4/8.14.4) with ESMTP id pBNMUIQb026087
	(version=TLSv1/SSLv3 cipher=DHE-RSA-CAMELLIA256-SHA bits=256 verify=NO);
	Fri, 23 Dec 2011 14:30:20 -0800 (PST)
	(envelope-from julian@freebsd.org)
Message-ID: <4EF5011A.70709@freebsd.org>
Date: Fri, 23 Dec 2011 14:30:50 -0800
From: Julian Elischer <julian@freebsd.org>
User-Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.4; en-US;
	rv:1.9.2.25) Gecko/20111213 Thunderbird/3.1.17
MIME-Version: 1.0
To: John Baldwin <jhb@freebsd.org>
References: <201112231520.00282.jhb@freebsd.org>
In-Reply-To: <201112231520.00282.jhb@freebsd.org>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Cc: arch@freebsd.org
Subject: Re: Teach KTR_SCHED to handle changing thread names
X-BeenThere: freebsd-arch@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Discussion related to FreeBSD architecture <freebsd-arch.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-arch>,
	<mailto:freebsd-arch-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-arch>
List-Post: <mailto:freebsd-arch@freebsd.org>
List-Help: <mailto:freebsd-arch-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-arch>,
	<mailto:freebsd-arch-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 23 Dec 2011 22:58:03 -0000

On 12/23/11 12:20 PM, John Baldwin wrote:
> When I use the new schedgraph on 8, I find that it commonly calls almost all
> threads "sh" or "tcsh" because it only uses the name from the initial fork and
> never notices when a thread changes its name via exec.  This makes traces
> harder to follow.  The patch below adds a hook to clear the cached thread name
> to force it to be regenerated on the next trace when td_name changes.  This
> makes the traces more usable for me at least.
>
>
I have no problems with this..  hard to decipher debugging as as bad 
as no debugging.