From owner-freebsd-hackers@FreeBSD.ORG Sat Jun 9 08:38:34 2012 Return-Path: <owner-freebsd-hackers@FreeBSD.ORG> Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 87E8A1065700; Sat, 9 Jun 2012 08:38:34 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from mail.zoral.com.ua (mx0.zoral.com.ua [91.193.166.200]) by mx1.freebsd.org (Postfix) with ESMTP id 000B38FC12; Sat, 9 Jun 2012 08:38:32 +0000 (UTC) Received: from skuns.kiev.zoral.com.ua (localhost [127.0.0.1]) by mail.zoral.com.ua (8.14.2/8.14.2) with ESMTP id q598cMLb044670; Sat, 9 Jun 2012 11:38:22 +0300 (EEST) (envelope-from kostikbel@gmail.com) Received: from deviant.kiev.zoral.com.ua (kostik@localhost [127.0.0.1]) by deviant.kiev.zoral.com.ua (8.14.5/8.14.5) with ESMTP id q598cMqE055134; Sat, 9 Jun 2012 11:38:22 +0300 (EEST) (envelope-from kostikbel@gmail.com) Received: (from kostik@localhost) by deviant.kiev.zoral.com.ua (8.14.5/8.14.5/Submit) id q598cMpl055133; Sat, 9 Jun 2012 11:38:22 +0300 (EEST) (envelope-from kostikbel@gmail.com) X-Authentication-Warning: deviant.kiev.zoral.com.ua: kostik set sender to kostikbel@gmail.com using -f Date: Sat, 9 Jun 2012 11:38:22 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: Mikolaj Golub <trociny@freebsd.org> Message-ID: <20120609083822.GJ85127@deviant.kiev.zoral.com.ua> References: <jqac8f$6mn$1@dough.gmane.org> <alpine.BSF.2.00.1206011429160.20357@wojtek.tensor.gdynia.pl> <CAF-QHFXsi3SaF-rmFK-qM89LfnStKwRWN1-HRM4yg4Bt_SFAOg@mail.gmail.com> <86sje5kkl6.fsf@kopusha.home.net> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="qhD8kUEc5MK9MdKG" Content-Disposition: inline In-Reply-To: <86sje5kkl6.fsf@kopusha.home.net> User-Agent: Mutt/1.4.2.3i X-Virus-Scanned: clamav-milter 0.95.2 at skuns.kiev.zoral.com.ua X-Virus-Status: Clean X-Spam-Status: No, score=-4.0 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 autolearn=ham version=3.2.5 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on skuns.kiev.zoral.com.ua Cc: Alan Cox <alc@freebsd.org>, Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>, Robert Watson <rwatson@freebsd.org>, Ivan Voras <ivoras@freebsd.org>, freebsd-hackers@freebsd.org Subject: Re: SuperPages utilization survey 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: Sat, 09 Jun 2012 08:38:34 -0000 --qhD8kUEc5MK9MdKG Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sat, Jun 09, 2012 at 10:31:17AM +0300, Mikolaj Golub wrote: >=20 > On Fri, 1 Jun 2012 14:54:48 +0200 Ivan Voras wrote: >=20 > IV> On 1 June 2012 14:35, Wojciech Puchar <wojtek@wojtek.tensor.gdynia.p= l> wrote: > >>> http://people.freebsd.org/~ivoras/stuff/spsurvey.py >=20 > ... >=20 > IV> If anyone posts more data, I'll analyse it. I'm more worried about t= he > IV> granularity of procstat, where it marks the entire region if a single > IV> superpage exists in it - it means any such analysis is only > IV> approximate. >=20 > Here is a patch (for kernel and procstat) that allows to see amount of pa= ges > mapped to superpages. >=20 > http://people.freebsd.org/~trociny/procstat-superpages.cnt.1.patch >=20 > Not sure it is useful enough to be committed. Superpage aggregates mappings for several normal-sized pages. As a consequence, when you iterate over small pages in sysctl_kern_proc_vmmap(), you account each superpage as many time as much constituent small pages it contains. --qhD8kUEc5MK9MdKG Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (FreeBSD) iEYEARECAAYFAk/TC34ACgkQC3+MBN1Mb4hc4QCfSIxNSXxqps0HBccBbXYQfv+X opcAnRoP7eT+az82ghZZm+3HwUNnjdAX =Hxjs -----END PGP SIGNATURE----- --qhD8kUEc5MK9MdKG--