From: Larry McVoy <lm@mcvoy.com>
To: Rob Pike <robpike@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: Thu, 16 Sep 2021 17:37:33 -0700 [thread overview]
Message-ID: <20210917003733.GB18465@mcvoy.com> (raw)
In-Reply-To: <CAKzdPgxCMFxxD+3ax27Mjp92sPjfNvBzPL1JNzp9Zj-VCsWFiw@mail.gmail.com>
On Fri, Sep 17, 2021 at 09:44:42AM +1000, Rob Pike wrote:
> Now, though, we run an OS on the machine, put a VM on that, install a
> container on that, and run another VM (or JVM) inside the container, then
> maybe we're at the level where we can execute actual code. And that misses
> all the extra pieces that are distributed and layered and indirected and
> virtualized for management, logging, security, data warehousing, ...
>
> It's a wonder any of it works at all.
I think a huge part of why it works is Pugs exporting the IOMMU to
user space. If I understand that work correctly, it really doesn't
matter how many layers you have, if the layers use what he did, then
the layers don't matter for I/O and I/O is usually where things get slow.
Rob, that link you sent makes my head spin. Which was probably your intent.
--lm
next prev parent reply other threads:[~2021-09-17 0:37 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
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 [this message]
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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