From owner-freebsd-hackers@FreeBSD.ORG  Thu May 31 13:01:43 2012
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
	by hub.freebsd.org (Postfix) with ESMTP id C4081106564A;
	Thu, 31 May 2012 13:01:43 +0000 (UTC)
	(envelope-from rysto32@gmail.com)
Received: from mail-we0-f182.google.com (mail-we0-f182.google.com
	[74.125.82.182])
	by mx1.freebsd.org (Postfix) with ESMTP id AA9248FC0A;
	Thu, 31 May 2012 13:01:42 +0000 (UTC)
Received: by werg1 with SMTP id g1so766810wer.13
	for <multiple recipients>; Thu, 31 May 2012 06:01:41 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113;
	h=mime-version:in-reply-to:references:date:message-id:subject:from:to
	:cc:content-type:content-transfer-encoding;
	bh=5lZMTRzIQwtSOx2u3LtFzz9TBkyOWfHo9USne1wT2zU=;
	b=efMUVCoWFWZ/RVr2ZH1Xl2MLGWsDO0PuCS5ZtFf40b7U74XsQlHpaERm6DHAWnRg+5
	28DHyQTULr/Ddp3O9iKDMFxe5g41y48rQu/lIThwlenLDwXxBXPhLhdTGyvlZQV6ah/5
	8m9txGfDOF3HyqXjnyjgJTcdyciGPkha+qH1xF5YvaftJx9aGTF08xlWbitK4xo8Wrn/
	JIbJSqCfVUsKNM95VLACVEAjiFd9Pr0xfXi3lQpjT7OoqSiPQJL8IKZTWH9lXszivC3f
	C2LpVe742pxk7j3Zsc4FCbjBD7+Sb3P94q4asn65uU4ZFzmiR55E+hwLRt+KxAxjm0LL
	X7pA==
MIME-Version: 1.0
Received: by 10.216.143.105 with SMTP id k83mr12492549wej.99.1338469301507;
	Thu, 31 May 2012 06:01:41 -0700 (PDT)
Received: by 10.180.146.131 with HTTP; Thu, 31 May 2012 06:01:41 -0700 (PDT)
In-Reply-To: <CAFMmRNyLoA3ayfVjrEzU5wLpfwWaYU7yM7V9Ns0r0nrCTYmTXg@mail.gmail.com>
References: <CAJ-VmomWV2XibSNSr5Mfh7mpKsWrX5GKsNfU9iq7TO6+KxxQhw@mail.gmail.com>
	<201205301124.52597.jhb@freebsd.org>
	<CAJ-VmokXN9Ci8j2ExZkA-U=fsrMmeOn-ULB0pCYdtSwqHWpiKQ@mail.gmail.com>
	<CAJ-VmomU8mK5W+Krj4Mtn=3R=EcqPB-YDd9LwNxZo49+y96bzA@mail.gmail.com>
	<4FC76515.10302@FreeBSD.org>
	<CAFMmRNyLoA3ayfVjrEzU5wLpfwWaYU7yM7V9Ns0r0nrCTYmTXg@mail.gmail.com>
Date: Thu, 31 May 2012 09:01:41 -0400
Message-ID: <CAFMmRNx-PYQ1cPKsOYLuBpf4UQXpwt23At5WULFQr0yU+qTbOg@mail.gmail.com>
From: Ryan Stone <rysto32@gmail.com>
To: Andriy Gapon <avg@freebsd.org>
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
Cc: freebsd-hackers@freebsd.org, Adrian Chadd <adrian@freebsd.org>,
	Alexander Motin <mav@freebsd.org>
Subject: Re: ULE/sched issues on stable/9 - why isn't preemption occuring?
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 31 May 2012 13:01:43 -0000

On Thu, May 31, 2012 at 8:48 AM, Ryan Stone <rysto32@gmail.com> wrote:
> KTR_SCHED comes with a performance hit. =A0Besides, with the DTrace
> sched provider that I committed this month (and MFC'ed yesterday) you
> can collect schedgraph data with a D script.

I suppose it would have been helpful to provide a link to the script:
http://people.freebsd.org/~rstone/dtrace/schedgraph.d

Post-process it with this before feeding it to schedgraph.py:
http://people.freebsd.org/~rstone/dtrace/make_ktr