From: Warner Losh <imp@bsdimp.com>
To: Dan Cross <crossd@gmail.com>
Cc: TUHS main list <tuhs@minnie.tuhs.org>
Subject: Re: [TUHS] ATC/OSDI'21 joint keynote: It's Time for Operating Systems to Rediscover Hardware (Timothy Roscoe)
Date: Fri, 3 Sep 2021 09:56:13 -0600 [thread overview]
Message-ID: <CANCZdfpdX=ajS=rrJSc4Zx98BuAhHJJttwuwTzU4EHyKM_0s0g@mail.gmail.com> (raw)
In-Reply-To: <CAEoi9W6LNPeE69TQKcr8v=8s17usj0c5BQWGFcLQ5nj9GKLEsg@mail.gmail.com>
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On Wed, Sep 1, 2021 at 4:00 PM Dan Cross <crossd@gmail.com> wrote:
> I'm curious about other peoples' thoughts on the talk and the overall
> topic?
>
My comment is that the mental map that he presents has always been a lie.
At least it's been a lie from a very early time.
Even in Unibus/Qbus days, the add-in cards had some kind of processor
on it from an early time. Several of the VAX boards had 68000 or similar
CPUs that managed memory. Even the simpler MFM boards had buffer
memory that needed to be managed before the DMA/PIO pulled it out
of the card. There's always been an element of different address spaces
with different degrees of visibility into those address spaces.
What has changed is all of these things are now on the SoC die so
you have good visibility (well, as good as the docs) into these things.
The number of different things has increased, and the for cross domain
knowledge has increased.
The simplistic world view was even inaccurate at the start....
Warner
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next prev parent reply other threads:[~2021-09-03 15:57 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-01 21:58 Dan Cross
2021-09-02 8:42 ` Tony Finch
2021-09-03 0:19 ` John Cowan
2021-09-03 3:24 ` Douglas McIlroy
2021-09-03 13:21 ` Theodore Ts'o
2021-09-08 11:14 ` Tony Finch
2021-09-16 19:27 ` Dan Cross
2021-09-17 0:34 ` Theodore Ts'o
2021-09-17 0:44 ` Larry McVoy
2021-09-17 17:07 ` Bakul Shah
2021-09-17 1:33 ` Dan Cross
2021-09-02 15:41 ` Kevin Bowling
2021-09-02 20:12 ` Marshall Conover
2021-09-03 15:56 ` Warner Losh [this message]
2021-09-03 17:10 ` Adam Thornton
2021-09-03 17:28 ` Larry McVoy
2021-09-03 17:42 ` John Floren
2021-09-03 19:02 ` Lawrence Stewart
2021-09-03 19:11 ` Clem Cole
2021-09-03 17:46 ` [TUHS] ATC/OSDI'21 joint keynote: It's Time for Operating Systems to Rediscover Hardware [ really a comment on SoCs ] Jon Steinhart
2021-09-16 18:38 ` [TUHS] ATC/OSDI'21 joint keynote: It's Time for Operating Systems to Rediscover Hardware (Timothy Roscoe) Dan Cross
2021-09-16 19:34 ` Jon Steinhart
2021-09-16 19:41 ` Larry McVoy
2021-09-16 23:14 ` Marshall Conover
2021-09-16 23:44 ` Rob Pike
2021-09-17 0:37 ` Larry McVoy
2021-09-17 1:38 ` Jon Steinhart
2021-09-17 3:54 ` John Cowan
2021-09-16 23:45 ` Jon Steinhart
2021-09-17 0:06 ` Al Kossow
2021-09-17 4:06 ` John Cowan
2021-09-17 4:18 ` Al Kossow
2021-09-17 0:32 ` Larry McVoy
2021-09-16 23:54 ` David Arnold
2021-09-17 1:10 ` Jon Steinhart
2021-09-17 1:28 ` Larry McVoy
2021-09-17 1:40 ` Jon Steinhart
2021-09-17 2:04 ` Larry McVoy
2021-09-17 2:21 ` Jon Steinhart
2021-09-17 2:48 ` Theodore Ts'o
2021-09-17 17:39 ` Bakul Shah
2021-09-17 17:51 ` Jon Steinhart
2021-09-17 18:07 ` Larry McVoy
2021-09-17 21:03 ` Derek Fawcus
2021-09-17 22:11 ` Larry McVoy
2021-09-19 4:05 ` Theodore Ts'o
2021-09-17 18:34 ` Bakul Shah
2021-09-17 18:56 ` Jon Steinhart
2021-09-17 19:16 ` Bakul Shah
2021-09-17 19:35 ` Jon Steinhart
2021-09-17 15:56 ` Bakul Shah
2021-09-17 18:24 ` ron minnich
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