From: Larry McVoy <lm@mcvoy.com>
To: John Cowan <cowan@ccil.org>
Cc: TUHS main list <tuhs@minnie.tuhs.org>
Subject: Re: [TUHS] Threads vs... not
Date: Wed, 4 Aug 2021 15:51:07 -0700 [thread overview]
Message-ID: <20210804225107.GL9074@mcvoy.com> (raw)
In-Reply-To: <CAD2gp_SAJv5N5CDEo-0Co0bqx0AU+4iJOa_ct80+ypTA7V59WQ@mail.gmail.com>
On Wed, Aug 04, 2021 at 06:41:08PM -0400, John Cowan wrote:
> On Wed, Aug 4, 2021 at 6:02 PM Larry McVoy <lm@mcvoy.com> wrote:
>
>
> > A computer is a state machine. Threads are for people who can't
> > program
> > state machines.
> >
> > Alan Cox
>
>
> Orly? Try embedding an LL(1) parser in an event loop that gives you a new
> event every time a block is read off the disk.
>
> Event loops are just manual CPS transformations of coroutines -- but why do
> the transformation manually instead of having your compiler do it for you?
The counter to this is Solaris tried to allocate a thread for each 8K page
on it's way to disk. The thread stack was 16K. This model, while seen as
ever so elegant, means that 2/3rds of main memory were thread stacks.
Sometimes threads make sense, there they did not.
--
---
Larry McVoy lm at mcvoy.com http://www.mcvoy.com/lm
next prev parent reply other threads:[~2021-08-04 22:51 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-04 21:48 Lawrence Stewart
2021-08-04 22:02 ` Larry McVoy
2021-08-04 22:41 ` John Cowan
2021-08-04 22:51 ` Larry McVoy [this message]
2021-08-05 20:32 ` Clem Cole
2021-08-06 0:55 ` Dan Cross
2021-08-04 22:13 ` Anthony Martin
2021-08-05 23:02 ` Bakul Shah
2021-08-06 14:19 ` Steffen Nurpmeso
2021-08-06 14:43 ` John Cowan
2021-08-06 15:12 ` Steffen Nurpmeso
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210804225107.GL9074@mcvoy.com \
--to=lm@mcvoy.com \
--cc=cowan@ccil.org \
--cc=tuhs@minnie.tuhs.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).