From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: tuhs-bounces@minnie.tuhs.org X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham autolearn_force=no version=3.4.1 Received: from minnie.tuhs.org (minnie.tuhs.org [45.79.103.53]) by inbox.vuxu.org (OpenSMTPD) with ESMTP id 6ae3771c for ; Wed, 20 Jun 2018 05:05:49 +0000 (UTC) Received: by minnie.tuhs.org (Postfix, from userid 112) id EDC36A17E0; Wed, 20 Jun 2018 15:05:48 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id 5B70CA17C7; Wed, 20 Jun 2018 15:05:19 +1000 (AEST) Received: by minnie.tuhs.org (Postfix, from userid 112) id 77D7BA17C2; Wed, 20 Jun 2018 15:05:17 +1000 (AEST) Received: from vtr.rulingia.com (vtr.rulingia.com [45.77.232.82]) by minnie.tuhs.org (Postfix) with ESMTPS id C4E5CA17C0 for ; Wed, 20 Jun 2018 15:05:16 +1000 (AEST) Received: from server.rulingia.com (ppp59-167-167-3.static.internode.on.net [59.167.167.3]) by vtr.rulingia.com (8.15.2/8.15.2) with ESMTPS id w5K54xNY055532 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 20 Jun 2018 15:05:05 +1000 (AEST) (envelope-from peter@rulingia.com) X-Bogosity: Ham, spamicity=0.000000 Received: from server.rulingia.com (localhost.rulingia.com [127.0.0.1]) by server.rulingia.com (8.15.2/8.15.2) with ESMTPS id w5K54sUm041429 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Wed, 20 Jun 2018 15:04:54 +1000 (AEST) (envelope-from peter@server.rulingia.com) Received: (from peter@localhost) by server.rulingia.com (8.15.2/8.15.2/Submit) id w5K54s3Z041428; Wed, 20 Jun 2018 15:04:54 +1000 (AEST) (envelope-from peter) Date: Wed, 20 Jun 2018 15:04:54 +1000 From: Peter Jeremy To: David Arnold Message-ID: <20180620050454.GC91748@server.rulingia.com> References: <20180615152542.E1EC918C08C@mercury.lcs.mit.edu> <20180619204536.GA91748@server.rulingia.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="Bu8it7iiRSEf40bY" Content-Disposition: inline In-Reply-To: X-PGP-Key: http://www.rulingia.com/keys/peter.pgp User-Agent: Mutt/1.10.0 (2018-05-17) Subject: Re: [TUHS] core X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: The Eunuchs Hysterical Society Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" --Bu8it7iiRSEf40bY Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 2018-Jun-20 08:55:05 +1000, David Arnold wrote: >Does the screen count as I/O? I was thinking about that as well. 1080p30 video is around 2MBps as H.264 = or about 140MBps as 6bpp raw. The former is negligible, the latter is still s= hy of the disparity in CPU power, especially if you take into account the GPU power needed to do the decoding. >I=E2=80=99d suggest that it=E2=80=99s just that the balance is (intentiona= lly) quite different. If you squint right, a GPU could look like a channel= ized I/O controller.=20 I agree. Even back then, there was a difference between commercial-oriented mainframes (the 1401 and 360/50 lineage - which stressed lots of I/O) and t= he scientific mainframes (709x, 360/85 - which stressed arithmetic capabilitie= s). One, not too inaccurate, description of the BCM2835 (RPi SoC) is that it's a GPU and the sole job of the CPU is to push data into the GPU. --=20 Peter Jeremy --Bu8it7iiRSEf40bY Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQKTBAEBCgB9FiEE7rKYbDBnHnTmXCJ+FqWXoOSiCzQFAlsp4HZfFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldEVF QjI5ODZDMzA2NzFFNzRFNjVDMjI3RTE2QTU5N0EwRTRBMjBCMzQACgkQFqWXoOSi CzSvVg//W5nUVMDsRpVDiPryOLyOBjpnvkn7KK5RmHFlXDGwXYgeiw+p3mWKqqPq SdbWrTx4X2X80XXXOWD4k5tdaTXmWJsOw+/WiHepY5b+uJ+TZxj4ZfYEyPD47cls 0llt5e9+Fhx4v80tqE2MPD2nepjWGrgdIeDZq3vtY4lJPrnMp6mcw2SCAnntcrjL ceCvWdeBkU9cdywp/OtkQYfzvmX1dPmO9XAjy75E3cmC6ajIxRUDqwQuxE4GugUx 2jdy1ZtwnKBQbt+FOchenZfrGzPwdaG+is2BCboQCevYaHaGM7SC3j/iYc7gjs0A SqZ1X2HA5bC4swmbCCgRMOmByISF9mLobFWwsz/PrZbmrdFgJiLzTq19at4yEKg6 hZg20buXSrjh4tD4dOXwlwLx/XzZWHtwZKIlytCXURdV4AwgXkuanAF6PJoPj795 NWHr2h58sMXNF265BJIx5+xU/xP1jW59EyGf+rN73Nt6Sihx8TgNFStvXKi11y7C qzVNEl1gG+vgQ9G40CA5ZHDG2bwCj8aG8K/tVFkaSLGn6sl1txLluCHcM0EG8syQ qD9wi8OZKPcsrOAZwKiXZGbVM8uRqeUoBPUnhvmeoBQGV08k+tW7besKiHQCzoxF a14JlbWXM4fo2h+Y2gVUA6+51c+c5A7Q+WpwyUmN7HPOhn2Wchg= =tRJ8 -----END PGP SIGNATURE----- --Bu8it7iiRSEf40bY--