From owner-freebsd-arch@FreeBSD.ORG Tue Jun 5 14:49:46 2012 Return-Path: Delivered-To: arch@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id DBC311065687 for ; Tue, 5 Jun 2012 14:49:46 +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 3E4EB8FC19 for ; Tue, 5 Jun 2012 14:49:44 +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 q55EncnA070300; Tue, 5 Jun 2012 17:49:38 +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 q55Enc67000151; Tue, 5 Jun 2012 17:49:38 +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 q55Encuk000150; Tue, 5 Jun 2012 17:49:38 +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: Tue, 5 Jun 2012 17:49:38 +0300 From: Konstantin Belousov To: Dag-Erling Sm??rgrav Message-ID: <20120605144938.GN85127@deviant.kiev.zoral.com.ua> References: <86bokyvtc2.fsf@ds4.des.no> <20120605143215.GL85127@deviant.kiev.zoral.com.ua> <86pq9dvn33.fsf@ds4.des.no> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="CQDko/0aYvuiEzgn" Content-Disposition: inline In-Reply-To: <86pq9dvn33.fsf@ds4.des.no> 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: arch@freebsd.org Subject: Re: KTR_SPAREx 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: Tue, 05 Jun 2012 14:49:46 -0000 --CQDko/0aYvuiEzgn Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Jun 05, 2012 at 04:40:32PM +0200, Dag-Erling Sm??rgrav wrote: > Konstantin Belousov writes: > > Moving all device drivers to KTR_DEV makes the KTR unusable for device > > driver debugging. When looking at the drm2 and gem traces, I do not want > > to see other devices tracepoints. Amount of data from GEM is huge, and > > obfuscating it with unrelated debugging recycles the ktr ring faster, a= side > > of making noise that cayses log to be meaningless. >=20 > We only have a limited number of KTR types - 32, to be precise. We > can't spare one for each driver, and there's no reason why *your* driver > (for any value of "you") should get its own while everybody else shares > KTR_DEV. I want to have only *my* driver trace points in the ring, by whatever means. Breaking it right now would mean that I cannot do any GEM debugging. >=20 > If you think KTR_DEV is too noisy, add sysctls to enable or disable > tracing on a per-device basis. It should be quite easy to generalize. So you are planning to break some useful, but possibly randomly-achieved functionality, and delegate the work to repair it to somebody else ? >=20 > (I still haven't gotten around to implementing a similar infrastructure > for network interfaces...) >=20 > DES > --=20 > Dag-Erling Sm??rgrav - des@des.no --CQDko/0aYvuiEzgn Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (FreeBSD) iEYEARECAAYFAk/OHIEACgkQC3+MBN1Mb4ipIwCeNnkTQuffMM3uGSnbZt2zY5pU rl0AoMUPQEGfFH93xKOOz/jGwcHZ5BIQ =gP0D -----END PGP SIGNATURE----- --CQDko/0aYvuiEzgn--