From owner-freebsd-stable@FreeBSD.ORG Fri Feb 8 17:18:14 2008 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 88D2D16A41B for ; Fri, 8 Feb 2008 17:18:14 +0000 (UTC) (envelope-from tevans.uk@googlemail.com) Received: from fk-out-0910.google.com (fk-out-0910.google.com [209.85.128.184]) by mx1.freebsd.org (Postfix) with ESMTP id 612FC13C4D9 for ; Fri, 8 Feb 2008 17:18:05 +0000 (UTC) (envelope-from tevans.uk@googlemail.com) Received: by fk-out-0910.google.com with SMTP id b27so4306897fka.11 for ; Fri, 08 Feb 2008 09:17:53 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=gamma; h=domainkey-signature:received:received:subject:from:to:cc:in-reply-to:references:content-type:date:message-id:mime-version:x-mailer; bh=7MYLmL6l6sPaw3sXiugSyFOX12SUk1C/rbzNsRdxaEs=; b=Wvbyu85GDbLzSgtPL1a1DPAIwbHDx6W7Xacrof9kyDWPTvigjw/CwUpi3AFS6fMRyRKWWiXi1fD2x/wFZ579sue+benY40dnyESznnvlr2ri1japEYIPvCEBCRdy7+QnE5hVzTkW77B6kJBbqP6exnq0ZGBsYm6a6wMKR93Rpdc= DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=subject:from:to:cc:in-reply-to:references:content-type:date:message-id:mime-version:x-mailer; b=ftRx9/UUdnbWLo4xuJEjUmt1FtAjES5QptL6jz/hdHwEkAwUShKGj6qUSN132Ii+ROwF05sRjU7eZuYsg2dDmSGfJ6G9UQazE/I9H11dX12Blnx8qo2JS8tUuZeC/Gt4NOnIbLvIvxkrmdWsXDQZx8rOBl7e8n6X+aM7Biw3mLQ= Received: by 10.82.138.6 with SMTP id l6mr606142bud.13.1202491073357; Fri, 08 Feb 2008 09:17:53 -0800 (PST) Received: from ?127.0.0.1? ( [217.206.187.79]) by mx.google.com with ESMTPS id m5sm16777468gve.11.2008.02.08.09.17.52 (version=SSLv3 cipher=RC4-MD5); Fri, 08 Feb 2008 09:17:52 -0800 (PST) From: Tom Evans To: Dominic Fandrey In-Reply-To: <47AC7FF6.1020801@bsdforen.de> References: <47A9F835.1060200@bsdforen.de> <47AA0696.5020109@bsdforen.de> <7872AB6E-21DA-4E2D-93C0-D07CFA3A7E47@mac.com> <47AA0E3E.4020304@bsdforen.de> <47ABF66E.4040807@bsdforen.de> <1202485501.2126.34.camel@localhost> <47AC7FF6.1020801@bsdforen.de> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-14vnf+Nq/tk3ELyiINLM" Date: Fri, 08 Feb 2008 17:17:51 +0000 Message-Id: <1202491071.2126.42.camel@localhost> Mime-Version: 1.0 X-Mailer: Evolution 2.10.2 FreeBSD GNOME Team Port Cc: "Carlos A. M. dos Santos" , freebsd-stable@freebsd.org Subject: Re: RELENG_7: interrupt eating whole cpu core X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 08 Feb 2008 17:18:14 -0000 --=-14vnf+Nq/tk3ELyiINLM Content-Type: text/plain Content-Transfer-Encoding: quoted-printable On Fri, 2008-02-08 at 17:14 +0100, Dominic Fandrey wrote: > Tom Evans wrote: > > If I try to turn on DMA, I just get WDMA2, which just doesn't cut it: >=20 > I think any DMA mode is fast enough to handle a DVD drive. There's just n= o=20 > necessity for more. >=20 WDMA is not UDMA. Any UDMA variant would be enough. WDMA2 provides a maximum of 16MiB/s, which will frequently lead to buffer underruns viewing a DVD. UDMA2 provides a maximum of 33MiB/s, which IS plenty. > >> # atacontrol mode acd0 udma5 > > current mode =3D WDMA2 >=20 > Same as for me. I'm satisfied with the speed of the drive. I'm rarely satisfied - I'm quite often not bothered enough to pursue :) Tom --=-14vnf+Nq/tk3ELyiINLM Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (FreeBSD) iD8DBQBHrI64lcRvFfyds/cRArc5AJ9gLTJ55RUTP5E2ghd76RLBSloleACfcksw MP64ram49FYhtHN1zNR2O/M= =VqbW -----END PGP SIGNATURE----- --=-14vnf+Nq/tk3ELyiINLM--