From: Peter Jeremy <peter@rulingia.com>
To: Tim Bradshaw <tfb@tfeb.org>
Cc: The Eunuchs Hysterical Society <tuhs@tuhs.org>
Subject: Re: [TUHS] core
Date: Wed, 20 Jun 2018 06:45:36 +1000 [thread overview]
Message-ID: <20180619204536.GA91748@server.rulingia.com> (raw)
In-Reply-To: <EE68EB27-E780-476A-867C-61DF328D1B9C@tfeb.org>
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On 2018-Jun-18 10:25:03 +0100, Tim Bradshaw <tfb@tfeb.org> wrote:
>Apropos of the 'my iPhone has more power than our System-360/50, but it has nowhere near the sheer I/O throughput of a mainframe' comment: there's obviously no doubt that devices like phones (and laptops, desktops &c) are I/O-starved compared to serious machines, but comparing the performance of an iPhone and a 360/50 seems to be a matter of choosing how fine the dust you want the 360/50 to be ground into should be.
>
>The 360/50 could, I think, transfer 4 bytes every 2 microseconds to/from main memory, which is 20Mb/s. I've just measured my iPhone (6): it can do about 36Mb/s ... over WiFi, backed by a 4G cellular connection
One way of looking at this actually backs up the claim: An iPhone has maybe
3 orders of magnitude more CPU power than a 360/50 but only a couple of
times the I/O bandwidth. So it's actually got maybe 2 orders of magnitude
less relative I/O throughput.
--
Peter Jeremy
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next prev parent reply other threads:[~2018-06-19 21:16 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-15 15:25 Noel Chiappa
2018-06-15 23:05 ` Dave Horsfall
2018-06-15 23:22 ` Lyndon Nerenberg
2018-06-16 6:36 ` Dave Horsfall
2018-06-16 19:07 ` Clem Cole
2018-06-18 9:25 ` Tim Bradshaw
2018-06-19 20:45 ` Peter Jeremy [this message]
2018-06-19 22:55 ` David Arnold
2018-06-20 5:04 ` Peter Jeremy
2018-06-20 5:41 ` Warner Losh
2018-06-20 8:10 ` [TUHS] Old mainframe I/O speed (was: core) Greg 'groggy' Lehey
2018-06-20 16:33 ` Paul Winalski
2018-06-21 3:05 ` Peter Jeremy
2018-06-21 14:00 ` Paul Winalski
2018-06-21 14:49 ` Arrigo Triulzi
2018-06-21 20:39 ` Paul Winalski
2018-06-22 5:32 ` Erik E. Fair
2018-06-22 13:32 ` Clem Cole
2018-06-23 6:08 ` Dave Horsfall
2018-06-23 17:02 ` ron minnich
-- strict thread matches above, loose matches on Subject: below --
2018-06-21 22:44 [TUHS] core Nelson H. F. Beebe
2018-06-21 23:07 ` Grant Taylor via TUHS
2018-06-21 23:38 ` Toby Thain
2018-06-21 17:40 Noel Chiappa
2018-06-21 17:07 Nelson H. F. Beebe
2018-06-21 13:46 Doug McIlroy
2018-06-21 16:13 ` Tim Bradshaw
2018-06-20 20:11 Doug McIlroy
2018-06-20 23:53 ` Tim Bradshaw
2018-06-19 12:23 Noel Chiappa
2018-06-19 12:58 ` Clem Cole
2018-06-19 13:53 ` John P. Linderman
2018-06-21 14:09 ` Paul Winalski
2018-06-19 11:50 Doug McIlroy
[not found] <20180618121738.98BD118C087@mercury.lcs.mit.edu>
2018-06-18 21:13 ` Johnny Billquist
2018-06-18 17:56 Noel Chiappa
2018-06-18 18:51 ` Clem Cole
2018-06-18 14:51 Noel Chiappa
2018-06-18 14:58 ` Warner Losh
[not found] <mailman.1.1529287201.13697.tuhs@minnie.tuhs.org>
2018-06-18 5:58 ` Johnny Billquist
2018-06-18 12:39 ` Ronald Natalie
2018-06-17 21:18 Noel Chiappa
2018-06-17 17:58 Noel Chiappa
2018-06-18 9:16 ` Tim Bradshaw
2018-06-18 15:33 ` Tim Bradshaw
2018-06-17 14:36 Noel Chiappa
2018-06-17 15:58 ` Derek Fawcus
2018-06-16 22:57 Noel Chiappa
[not found] <mailman.1.1529175600.3826.tuhs@minnie.tuhs.org>
2018-06-16 22:14 ` Johnny Billquist
2018-06-16 22:38 ` Arthur Krewat
2018-06-17 0:15 ` Clem cole
2018-06-17 1:50 ` Johnny Billquist
2018-06-17 10:33 ` Ronald Natalie
2018-06-20 16:55 ` Paul Winalski
2018-06-20 21:35 ` Johnny Billquist
2018-06-20 22:24 ` Paul Winalski
2018-06-16 13:49 Noel Chiappa
2018-06-16 14:10 ` Clem Cole
2018-06-16 14:34 ` Lawrence Stewart
2018-06-16 15:28 ` Larry McVoy
2018-06-16 14:10 ` Steve Nickolas
2018-06-16 14:13 ` William Pechter
2018-06-16 13:37 Noel Chiappa
2018-06-16 18:59 ` Clem Cole
2018-06-17 12:15 ` Derek Fawcus
2018-06-17 17:33 ` Theodore Y. Ts'o
2018-06-17 19:50 ` Jon Forrest
2018-06-18 14:56 ` Clem Cole
2018-06-18 12:36 ` Tony Finch
2018-06-16 12:58 Doug McIlroy
2018-06-20 11:10 ` Dave Horsfall
2018-06-16 12:51 Noel Chiappa
2018-06-16 13:11 ` Clem cole
2018-06-15 11:19 A. P. Garcia
2018-06-15 13:50 ` Steffen Nurpmeso
2018-06-15 14:21 ` Clem Cole
2018-06-15 15:11 ` John P. Linderman
2018-06-15 15:21 ` Larry McVoy
2018-06-16 1:08 ` Greg 'groggy' Lehey
2018-06-16 2:00 ` Nemo Nusquam
2018-06-16 2:17 ` John P. Linderman
2018-06-16 3:06 ` Clem cole
2018-06-20 10:06 ` Dave Horsfall
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