From owner-svn-src-all@FreeBSD.ORG Fri Nov 21 06:34:04 2014 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id D78B31D2; Fri, 21 Nov 2014 06:34:04 +0000 (UTC) Received: from st11p02mm-asmtp001.mac.com (st11p02mm-asmtp001.mac.com [17.172.220.236]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id ACB47DA2; Fri, 21 Nov 2014 06:34:04 +0000 (UTC) Received: from fukuyama.hsd1.ca.comcast.net (unknown [73.162.13.215]) by st11p02mm-asmtp001.mac.com (Oracle Communications Messaging Server 7.0.5.33.0 64bit (built Aug 27 2014)) with ESMTPSA id <0NFD00LE5M8GN520@st11p02mm-asmtp001.mac.com>; Fri, 21 Nov 2014 06:33:54 +0000 (GMT) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.13.68,1.0.28,0.0.0000 definitions=2014-11-21_03:2014-11-20,2014-11-21,1970-01-01 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 suspectscore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=7.0.1-1408290000 definitions=main-1411210058 Content-type: text/plain; charset=us-ascii MIME-version: 1.0 (Mac OS X Mail 8.1 \(1993\)) Subject: Re: svn commit: r274489 - in head/sys/amd64: amd64 include From: Rui Paulo In-reply-to: <201411132211.sADMBjP3009246@svn.freebsd.org> Date: Thu, 20 Nov 2014 22:33:51 -0800 Content-transfer-encoding: quoted-printable Message-id: <35E5EAD8-99C1-43C0-8D01-B3B5B86ECA25@me.com> References: <201411132211.sADMBjP3009246@svn.freebsd.org> To: Scott Long X-Mailer: Apple Mail (2.1993) Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 21 Nov 2014 06:34:05 -0000 On Nov 13, 2014, at 14:11, Scott Long wrote: >=20 > Author: scottl > Date: Thu Nov 13 22:11:44 2014 > New Revision: 274489 > URL: https://svnweb.freebsd.org/changeset/base/274489 >=20 > Log: > Extend earlier addition of stack frames to most of support.S. This = makes > stack traces in KDB, HWPMC, and DTrace much more reliable and useful. No performance differences? The kernel enables/disables the compiler = option to omit the frame pointer based on the kernel config file. If = DDB, DTrace, or HWPMC is enabled, the frame pointer is always saved in C = functions.=20 Some of these functions are in the hot path, so if you didn't see any = performance problem, I wonder if we should disable -fomit-frame-pointer = always. -- Rui Paulo