From owner-freebsd-current@FreeBSD.ORG Sat Dec 1 19:23:57 2007 Return-Path: Delivered-To: current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 47F0116A417 for ; Sat, 1 Dec 2007 19:23:57 +0000 (UTC) (envelope-from youshi10@u.washington.edu) Received: from mxout2.cac.washington.edu (mxout2.cac.washington.edu [140.142.33.4]) by mx1.freebsd.org (Postfix) with ESMTP id 1BC5213C468 for ; Sat, 1 Dec 2007 19:23:57 +0000 (UTC) (envelope-from youshi10@u.washington.edu) Received: from smtp.washington.edu (smtp.washington.edu [140.142.32.139]) by mxout2.cac.washington.edu (8.13.7+UW06.06/8.13.7+UW07.09) with ESMTP id lB1JNq26010533 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Sat, 1 Dec 2007 11:23:52 -0800 X-Auth-Received: from [128.208.7.42] (shiina.dyn.cs.washington.edu [128.208.7.42]) (authenticated authid=youshi10) by smtp.washington.edu (8.13.7+UW06.06/8.13.7+UW07.09) with ESMTP id lB1JNqQa003357 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NOT); Sat, 1 Dec 2007 11:23:52 -0800 In-Reply-To: <20071201191324.GA90389@ace.netcins.ceid.upatras.gr> References: <20071201165946.GA13320@ace.netcins.ceid.upatras.gr> <20071201191324.GA90389@ace.netcins.ceid.upatras.gr> Mime-Version: 1.0 (Apple Message framework v752.2) X-Gpgmail-State: !signed Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Message-Id: Content-Transfer-Encoding: 7bit From: Garrett Cooper Date: Sat, 1 Dec 2007 11:22:37 -0800 To: Nikos Ntarmos X-Mailer: Apple Mail (2.752.2) X-PMX-Version: 5.3.3.310218, Antispam-Engine: 2.5.2.313940, Antispam-Data: 2007.12.1.110444 X-Uwash-Spam: Gauge=IIIIIII, Probability=7%, Report='__CP_URI_IN_BODY 0, __CT 0, __CTE 0, __CT_TEXT_PLAIN 0, __HAS_MSGID 0, __HAS_X_MAILER 0, __LINES_OF_YELLING 0, __MIME_TEXT_ONLY 0, __MIME_VERSION 0, __SANE_MSGID 0' Cc: current@freebsd.org Subject: Re: gprof's broken in 7-CURRENT X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 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: Sat, 01 Dec 2007 19:23:57 -0000 On Dec 1, 2007, at 11:13 AM, Nikos Ntarmos wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > On Sat, Dec 01, 2007 at 06:59:46PM +0200, Nikos Ntarmos wrote: >> I just finished a cvsup/buildworld/installworld cycle and tried >> executing a CFLAGS+=-pg compiled version of pkg_info. Except from the >> (initially confusing) fact that pkg_info chdir(2)'s into every port's >> directory under /var/db/pkg and thus pkg_info.gmon is created in the >> dir of the last visited port, gprof didn't segfault or whatever. >> >> However, I now see an artifact, not present previously in my BETA1 >> world: .mcount seems to be taking the best part of the time >> percentage >> in the flat profile section. FYI I've done a 'pkg_info -a >/dev/null' >> and put the output of 'gprof /path/to/profiled/pkg_info >> pkg_info.gmon' >> online at http://ntarmos.dyndns.org/Misc/pkg_info.gprof. I also see >> this with my other -pg compiled code, so this is due to either >> something that changed between BETA1 and now, or some of the (just >> rebuilt) libraries taking up the change in profile.h. > > Interestingly, the .mcount flatprofline is substituted by _mcleanup if > pkg_info is compiled -O1 -- see [1]. If it is then compiled -O0, the > output is as in [2] (i.e. no .mcount and no _mcleanup). I guess > there's > something I don't get wrt optimization levels and profiling, > although I > can't quite see the connection. After all, .mcount and _mcleanup are > explicitly excluded by default (usr.bin/gprof/elf.c:59, > usr.bin/gprof/aout.c:61). > > \n\n > > [1] http://ntarmos.dyndns.org/Misc/pkg_info.gprof.O1 > [2] http://ntarmos.dyndns.org/Misc/pkg_info.gprof.O0 > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v2.0.4 (FreeBSD) > Comment: Nikos Ntarmos > > iD8DBQFHUbJUm6J1ac+VFgoRAmD8AJ9Ut3XoJVJwZ22OsArviKHjH4dsGwCeN4T4 > ECtTFTRuhQI/GVlny+VifyU= > =NSTP > -----END PGP SIGNATURE----- Strange. Maybe there are some inconsistencies between my system and an up-to-date system, or maybe I'm just using gprof incorrectly. Could you show me how you ran pkg_info with gprof please? Thanks, -Garrett