From owner-freebsd-current@FreeBSD.ORG Sat Dec 1 19:13:31 2007 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id BDFD116A418 for ; Sat, 1 Dec 2007 19:13:31 +0000 (UTC) (envelope-from ntarmos@ceid.upatras.gr) Received: from poseidon.ceid.upatras.gr (poseidon.ceid.upatras.gr [150.140.141.169]) by mx1.freebsd.org (Postfix) with ESMTP id 35A6513C455 for ; Sat, 1 Dec 2007 19:13:31 +0000 (UTC) (envelope-from ntarmos@ceid.upatras.gr) Received: from mail.ceid.upatras.gr (unknown [10.1.0.143]) by poseidon.ceid.upatras.gr (Postfix) with ESMTP id 42D72EB4DF1 for ; Sat, 1 Dec 2007 21:13:30 +0200 (EET) Received: from localhost (europa.ceid.upatras.gr [127.0.0.1]) by mail.ceid.upatras.gr (Postfix) with ESMTP id 261C2158092 for ; Sat, 1 Dec 2007 21:13:30 +0200 (EET) X-Virus-Scanned: amavisd-new at ceid.upatras.gr Received: from mail.ceid.upatras.gr ([127.0.0.1]) by localhost (europa.ceid.upatras.gr [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id AnUbbv4LSG2f for ; Sat, 1 Dec 2007 21:13:30 +0200 (EET) Received: from ace.netcins.ceid.upatras.gr (vfppp079167010191.dsl.hol.gr [79.167.10.191]) by mail.ceid.upatras.gr (Postfix) with ESMTP id B7841158935 for ; Sat, 1 Dec 2007 21:13:29 +0200 (EET) Received: by ace.netcins.ceid.upatras.gr (Postfix, from userid 1001) id 159293F457; Sat, 1 Dec 2007 21:13:24 +0200 (EET) Date: Sat, 1 Dec 2007 21:13:24 +0200 From: Nikos Ntarmos To: freebsd-current@freebsd.org Message-ID: <20071201191324.GA90389@ace.netcins.ceid.upatras.gr> Mail-Followup-To: freebsd-current@freebsd.org References: <20071201165946.GA13320@ace.netcins.ceid.upatras.gr> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; x-action=pgp-signed Content-Disposition: inline In-Reply-To: <20071201165946.GA13320@ace.netcins.ceid.upatras.gr> Organization: NetCInS Lab., C.E.I.D., U. of Patras, Greece WWW-Homepage: http://ntarmos.dyndns.org/ X-PGP-Fingerprint: 9680 60A7 DE60 0298 B1F0 9B22 9BA2 7569 CF95 160A Office-Phone: +30-2610-996919 Office-Fax: +30-2610-969011 GPS-Info: 38.31N, 21.82E User-Agent: mutt-ng/devel-r804 (FreeBSD) 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 19:13:31 -0000 -----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-----