From owner-freebsd-arch@FreeBSD.ORG Mon Aug 14 19:01:01 2006 Return-Path: X-Original-To: freebsd-arch@freebsd.org Delivered-To: freebsd-arch@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 6413F16A4E1 for ; Mon, 14 Aug 2006 19:01:01 +0000 (UTC) (envelope-from asmrookie@gmail.com) Received: from wx-out-0506.google.com (wx-out-0506.google.com [66.249.82.227]) by mx1.FreeBSD.org (Postfix) with ESMTP id B904F43D78 for ; Mon, 14 Aug 2006 19:00:55 +0000 (GMT) (envelope-from asmrookie@gmail.com) Received: by wx-out-0506.google.com with SMTP id i27so425034wxd for ; Mon, 14 Aug 2006 12:00:55 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:sender:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references:x-google-sender-auth; b=KYK+GHXCaaHNdB+sl9Q7cYZGCaqFd1osu6uR+0TaRpD93AZPsHYVrH8bt05woKCWeMPdUvxZRa1JkXW6b7sd1xQhI7UO2FCU79WnSFk/ySP33A7rnV6hbG9U68tXlqYGYHUF/xKSx6Ldh13XOH6Zp3M+6+7J0aYRFq9hNhIuRW0= Received: by 10.70.109.4 with SMTP id h4mr4386796wxc; Mon, 14 Aug 2006 12:00:55 -0700 (PDT) Received: by 10.70.11.4 with HTTP; Mon, 14 Aug 2006 12:00:54 -0700 (PDT) Message-ID: <3bbf2fe10608141200v51d370cajfde0fd94cf92aac@mail.gmail.com> Date: Mon, 14 Aug 2006 21:00:54 +0200 From: "Attilio Rao" Sender: asmrookie@gmail.com To: freebsd-arch@freebsd.org, freebsd-current@freebsd.org, "John Baldwin" In-Reply-To: <3bbf2fe10608071227j17c4cfa6qd84e1d8e53668fda@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <3bbf2fe10608071227j17c4cfa6qd84e1d8e53668fda@mail.gmail.com> X-Google-Sender-Auth: bc1bd3c96aead14f Cc: Subject: Re: [PATCH] Adding Solaris-style "owner of records" to rwlocks X-BeenThere: freebsd-arch@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussion related to FreeBSD architecture List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 14 Aug 2006 19:01:01 -0000 2006/8/7, Attilio Rao : > This is a first implementation of the owner of records concept in rwlocks. > It allows to avoid the priority inversion problem in the current > rwlocks implementation (for readers). > > The main idea (that John and I discussed) is to have as owner of > records the first rlock'er for a "class contention". > The implementation consists in adding two flags (RW_LOCK_OWNED and > RW_LOCK_EXEMPTED) which are used in order to not penalyze the easy > case, and syncronizing the operation of acquiring and dropping the > owner of records with the turnstile spin-lock. > The main scheme might work in this way: > > thread1::rlock() -> sets the owner of records > thread2::rlock() -> checks for RW_LOCK_OWNED bit and, if it is set, go > in the easy case > thread3::rlock() -> checks for RW_LOCK_OWNED... > thread4::wlock() -> blocks and land its priority to thread1 > thread1::runlock() -> disable the owner of records (disowning the > associated turnstile) and sets the RW_LOCK_EXEMPTED flag. In this way > other threads will treact as an easy case. > ... > > What I actually need is a testing suite for heavy-load contentions, > since I would like to detect eventual races I missed, etc. If somebody > has a get-ready testing suite, please, let me know. > > The patch against HEAD is here: > http://users.gufi.org/~rookie/works/patches/rwlocks.diff > > Please, this is not intended to be a final implementation for this, > since I think that it can be improved; it is just a starting point for > ongoing works and improvements. I cleaned a lot the code, added some extra debug stubs and comments and get rid of RW_LOCK_EXEMPTED bit. Please refer to: http://users.gufi.org/~rookie/works/patches/rwlocks2.diff in order to make tests and comments. Thanks, Attilio -- Peace can only be achieved by understanding - A. Einstein From owner-freebsd-arch@FreeBSD.ORG Tue Aug 15 23:31:07 2006 Return-Path: X-Original-To: freebsd-arch@freebsd.org Delivered-To: freebsd-arch@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id DCB8616A4DD for ; Tue, 15 Aug 2006 23:31:07 +0000 (UTC) (envelope-from uucp@brian.han.de) Received: from baghira.han.de (baghira.han.de [62.48.90.2]) by mx1.FreeBSD.org (Postfix) with ESMTP id 414A243D45 for ; Tue, 15 Aug 2006 23:31:06 +0000 (GMT) (envelope-from uucp@brian.han.de) Received: by baghira.han.de (Postfix, from userid 10) id D61F6CDA23; Wed, 16 Aug 2006 01:31:02 +0200 (MEST) Received: (qmail 13245 invoked by uid 10); 16 Aug 2006 01:21:35 -0000 MBOX-Line: From owner-freebsd-current@freebsd.org Mon Aug 14 21:04:34 2006 Received: from mx2.freebsd.org (mx2.freebsd.org [216.136.204.119]) by baghira.han.de (Postfix) with ESMTP id 66A92CD841 for ; Mon, 14 Aug 2006 21:04:34 +0200 (MEST) Received: from hub.freebsd.org (hub.freebsd.org [216.136.204.18]) by mx2.freebsd.org (Postfix) with ESMTP id A95199210C; Mon, 14 Aug 2006 19:01:31 +0000 (GMT) (envelope-from owner-freebsd-current@freebsd.org) Received: from hub.freebsd.org (localhost [127.0.0.1]) by hub.freebsd.org (Postfix) with ESMTP id 7623B16A4E1; Mon, 14 Aug 2006 19:01:07 +0000 (UTC) (envelope-from owner-freebsd-current@freebsd.org) X-Original-To: freebsd-current@freebsd.org Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 7BD8A16A4DE for ; Mon, 14 Aug 2006 19:01:01 +0000 (UTC) (envelope-from asmrookie@gmail.com) Received: from wx-out-0506.google.com (wx-out-0506.google.com [66.249.82.226]) by mx1.FreeBSD.org (Postfix) with ESMTP id B8EBB43D77 for ; Mon, 14 Aug 2006 19:00:55 +0000 (GMT) (envelope-from asmrookie@gmail.com) Received: by wx-out-0506.google.com with SMTP id i27so425033wxd for ; Mon, 14 Aug 2006 12:00:55 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:sender:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references:x-google-sender-auth; b=KYK+GHXCaaHNdB+sl9Q7cYZGCaqFd1osu6uR+0TaRpD93AZPsHYVrH8bt05woKCWeMPdUvxZRa1JkXW6b7sd1xQhI7UO2FCU79WnSFk/ySP33A7rnV6hbG9U68tXlqYGYHUF/xKSx6Ldh13XOH6Zp3M+6+7J0aYRFq9hNhIuRW0= Received: by 10.70.109.4 with SMTP id h4mr4386796wxc; Mon, 14 Aug 2006 12:00:55 -0700 (PDT) Received: by 10.70.11.4 with HTTP; Mon, 14 Aug 2006 12:00:54 -0700 (PDT) Message-ID: <3bbf2fe10608141200v51d370cajfde0fd94cf92aac@mail.gmail.com> Date: Mon, 14 Aug 2006 21:00:54 +0200 From: "Attilio Rao" To: freebsd-arch@freebsd.org, freebsd-current@freebsd.org, "John Baldwin" In-Reply-To: <3bbf2fe10608071227j17c4cfa6qd84e1d8e53668fda@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <3bbf2fe10608071227j17c4cfa6qd84e1d8e53668fda@mail.gmail.com> X-Google-Sender-Auth: bc1bd3c96aead14f X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Sender: owner-freebsd-current@freebsd.org Errors-To: owner-freebsd-current@freebsd.org Cc: Subject: Re: [PATCH] Adding Solaris-style "owner of records" to rwlocks X-BeenThere: freebsd-arch@freebsd.org List-Id: Discussion related to FreeBSD architecture List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 15 Aug 2006 23:31:08 -0000 2006/8/7, Attilio Rao : > This is a first implementation of the owner of records concept in rwlocks. > It allows to avoid the priority inversion problem in the current > rwlocks implementation (for readers). > > The main idea (that John and I discussed) is to have as owner of > records the first rlock'er for a "class contention". > The implementation consists in adding two flags (RW_LOCK_OWNED and > RW_LOCK_EXEMPTED) which are used in order to not penalyze the easy > case, and syncronizing the operation of acquiring and dropping the > owner of records with the turnstile spin-lock. > The main scheme might work in this way: > > thread1::rlock() -> sets the owner of records > thread2::rlock() -> checks for RW_LOCK_OWNED bit and, if it is set, go > in the easy case > thread3::rlock() -> checks for RW_LOCK_OWNED... > thread4::wlock() -> blocks and land its priority to thread1 > thread1::runlock() -> disable the owner of records (disowning the > associated turnstile) and sets the RW_LOCK_EXEMPTED flag. In this way > other threads will treact as an easy case. > ... > > What I actually need is a testing suite for heavy-load contentions, > since I would like to detect eventual races I missed, etc. If somebody > has a get-ready testing suite, please, let me know. > > The patch against HEAD is here: > http://users.gufi.org/~rookie/works/patches/rwlocks.diff > > Please, this is not intended to be a final implementation for this, > since I think that it can be improved; it is just a starting point for > ongoing works and improvements. I cleaned a lot the code, added some extra debug stubs and comments and get rid of RW_LOCK_EXEMPTED bit. Please refer to: http://users.gufi.org/~rookie/works/patches/rwlocks2.diff in order to make tests and comments. Thanks, Attilio -- Peace can only be achieved by understanding - A. Einstein _______________________________________________ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org" From owner-freebsd-arch@FreeBSD.ORG Wed Aug 16 08:34:33 2006 Return-Path: X-Original-To: arch@FreeBSD.org Delivered-To: freebsd-arch@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5552116A4DF for ; Wed, 16 Aug 2006 08:34:33 +0000 (UTC) (envelope-from rink@rink.nu) Received: from mx0.rink.nu (thunderstone.rink.nu [80.112.228.34]) by mx1.FreeBSD.org (Postfix) with ESMTP id E03D143D46 for ; Wed, 16 Aug 2006 08:34:32 +0000 (GMT) (envelope-from rink@rink.nu) Received: from localhost (localhost [127.0.0.1]) by mx0.rink.nu (Postfix) with ESMTP id D16721707E for ; Wed, 16 Aug 2006 10:35:30 +0200 (CEST) X-Virus-Scanned: amavisd-new at rink.nu Received: from mx0.rink.nu ([127.0.0.1]) by localhost (thunderstone.rink.nu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id iin-LD3MeBaB for ; Wed, 16 Aug 2006 10:35:27 +0200 (CEST) Received: by mx0.rink.nu (Postfix, from userid 1000) id BB5B61707B; Wed, 16 Aug 2006 10:35:27 +0200 (CEST) Date: Wed, 16 Aug 2006 10:35:27 +0200 From: Rink Springer To: arch@FreeBSD.org Message-ID: <20060816083527.GC60704@rink.nu> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="8GpibOaaTibBMecb" Content-Disposition: inline User-Agent: Mutt/1.5.11 Cc: Subject: RFC: FreeBSD/xbox MFC patch X-BeenThere: freebsd-arch@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussion related to FreeBSD architecture List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Aug 2006 08:34:33 -0000 --8GpibOaaTibBMecb Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hello everyone, In hopefully timely order for 6.2-RELEASE, I've made a MFC of FreeBSD/xbox as it appears in -HEAD, which has been quite stable. The functionality is completely identical to what is in HEAD. As nfe(4) doesn't yet exist in HEAD, the -STABLE branch uses nve(4) as a suitable replacement for the time being. Anyway, the patch can be retrieved from http://rink.nu/tmp/xbox-6stable.diff, which I'd like to commit somewhere next week. The code is identical to what we currently have in -HEAD; a few minor modifications were made to make it work for -STABLE. Questions or comments are much appreciated. PS. The dev/fb/boot_font.c change is a leftover include from the Alpha days (this file used to be Alpha-specific), imp@ already removed this in -HEAD, refer to revision 1.6 for more information. --=20 Rink P.W. Springer - http://rink.nu "When will the internet move from 64Kb max .com domains to .exe domains which can use much more memory?" - Edwin Groothuis --8GpibOaaTibBMecb Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (FreeBSD) iD8DBQFE4tjPb3O60uztv/8RAnGTAKCUXbnDsAW7qOiwBji0V5vauBkcRACbBXp/ TQFQlWlnqluCQCv8lYwrDaI= =3cSr -----END PGP SIGNATURE----- --8GpibOaaTibBMecb-- From owner-freebsd-arch@FreeBSD.ORG Thu Aug 17 13:17:01 2006 Return-Path: X-Original-To: freebsd-arch@FreeBSD.org Delivered-To: freebsd-arch@FreeBSD.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id ECFD716A4DD for ; Thu, 17 Aug 2006 13:17:01 +0000 (UTC) (envelope-from pssl@nb.sympatico.ca) Received: from simmts5-srv.bellnexxia.net (simmts5.bellnexxia.net [206.47.199.163]) by mx1.FreeBSD.org (Postfix) with ESMTP id 57EBF43D49 for ; Thu, 17 Aug 2006 13:17:01 +0000 (GMT) (envelope-from pssl@nb.sympatico.ca) Received: from ZIPPEY ([142.166.247.174]) by simmts5-srv.bellnexxia.net (InterMail vM.5.01.06.13 201-253-122-130-113-20050324) with SMTP id <20060817131657.IAPK21960.simmts5-srv.bellnexxia.net@ZIPPEY> for ; Thu, 17 Aug 2006 09:16:57 -0400 Message-ID: <000601c6c1ff$77b54ef0$aef7a68e@ZIPPEY> From: To: Date: Thu, 17 Aug 2006 10:17:07 -0300 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: Subject: ia64 vs amd X-BeenThere: freebsd-arch@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussion related to FreeBSD architecture List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 17 Aug 2006 13:17:02 -0000 from david russell: q:I paid someone to download ia64,and i have a complete copy,but my = server is a supermicro server and is a xeon based board,so can i just = change kernel by swapping it out with one from an amd boot disk? will the ia64 work ok on this board without damages:? thanx,i suspect the chipsets are really same,any comment on that? david pssl@nb.sympatico.ca From owner-freebsd-arch@FreeBSD.ORG Thu Aug 17 13:22:43 2006 Return-Path: X-Original-To: freebsd-arch@FreeBSD.org Delivered-To: freebsd-arch@FreeBSD.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 1E53B16A4DD for ; Thu, 17 Aug 2006 13:22:43 +0000 (UTC) (envelope-from des@des.no) Received: from tim.des.no (tim.des.no [194.63.250.121]) by mx1.FreeBSD.org (Postfix) with ESMTP id DDF0E43D5F for ; Thu, 17 Aug 2006 13:22:38 +0000 (GMT) (envelope-from des@des.no) Received: from tim.des.no (localhost [127.0.0.1]) by spam.des.no (Postfix) with ESMTP id 67AA920A7; Thu, 17 Aug 2006 15:22:34 +0200 (CEST) X-Spam-Tests: AWL X-Spam-Learn: disabled X-Spam-Score: 0.0/3.0 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on tim.des.no Received: from xps.des.no (des.no [80.203.243.180]) by tim.des.no (Postfix) with ESMTP id 5958E20A6; Thu, 17 Aug 2006 15:22:34 +0200 (CEST) Received: by xps.des.no (Postfix, from userid 1001) id 2B38A33C24; Thu, 17 Aug 2006 15:22:34 +0200 (CEST) From: des@des.no (Dag-Erling =?iso-8859-1?Q?Sm=F8rgrav?=) To: References: <000601c6c1ff$77b54ef0$aef7a68e@ZIPPEY> Date: Thu, 17 Aug 2006 15:22:33 +0200 In-Reply-To: <000601c6c1ff$77b54ef0$aef7a68e@ZIPPEY> (pssl@nb.sympatico.ca's message of "Thu, 17 Aug 2006 10:17:07 -0300") Message-ID: <86d5azlco6.fsf@xps.des.no> User-Agent: Gnus/5.110003 (No Gnus v0.3) Emacs/21.3 (berkeley-unix) MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Cc: freebsd-arch@FreeBSD.org Subject: Re: ia64 vs amd X-BeenThere: freebsd-arch@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussion related to FreeBSD architecture List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 17 Aug 2006 13:22:43 -0000 writes: > I paid someone to download ia64,and i have a complete copy,but my > server is a supermicro server and is a xeon based board,so can i > just change kernel by swapping it out with one from an amd boot > disk? An ia64 kernel will not run on a Xeon. You must be thinking of amd64, which will run on EM64T-capable Xeons. DES --=20 Dag-Erling Sm=F8rgrav - des@des.no From owner-freebsd-arch@FreeBSD.ORG Fri Aug 18 04:35:44 2006 Return-Path: X-Original-To: freebsd-arch@freebsd.org Delivered-To: freebsd-arch@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id B261316A4DE for ; Fri, 18 Aug 2006 04:35:44 +0000 (UTC) (envelope-from frdidibvoe@mindspring.com) Received: from user-0cetddu.cable.mindspring.com (user-0cetddu.cable.mindspring.com [24.238.181.190]) by mx1.FreeBSD.org (Postfix) with ESMTP id 0FC4E43D5A for ; Fri, 18 Aug 2006 04:34:17 +0000 (GMT) (envelope-from frdidibvoe@mindspring.com) From: "idea" To: freebsd-arch@freebsd.org Date: Thu, 17 Aug 2006 23:34:10 +0500 MIME-Version: 1.0 Content-Type: multipart/related; boundary="----=_NextPart_000_0004_01C6C255.A3AE5DC0" X-Mailer: Microsoft Office Outlook, Build 11.0.5510 Thread-Index: AcbCVaOxEI7/TdKqRzeVHMBr+XDRbA== X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2869 Message-Id: X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Subject: girth citys X-BeenThere: freebsd-arch@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussion related to FreeBSD architecture List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 18 Aug 2006 04:35:44 -0000 ------=_NextPart_000_0004_01C6C255.A3AE5DC0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit love taste range down East Coast far Florida. runs exacting assurance total unless Miss Piggy consider something slimy ashtray. whatever else divinely moist idea legendary plus Scotia Copyright UsWork UsBack Top This cache retrieved Aug :: GMT.G snapshot took page crawled web.The changed time. 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