Computer Old Farts Forum
 help / color / mirror / Atom feed
From: Larry McVoy <>
To: Dan Cross <>
Cc: John Cowan <>, ron minnich <>,
	COFF <>
Subject: [COFF] Re: [TUHS] Re: the wheel of reincarnation goes sideways
Date: Thu, 9 Mar 2023 12:09:32 -0800	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

On Thu, Mar 09, 2023 at 02:55:44PM -0500, Dan Cross wrote:
> On Wed, Mar 8, 2023 at 8:22???PM John Cowan <> wrote:
> > On Wed, Mar 8, 2023 at 2:53???PM Dan Cross <> wrote:
> >> But the
> >> 3090 was really more like a distributed system than the Athlon box
> >> was, with all sorts of offload capabilities. For that matter, a
> >> thousand users probably _could_ telnet into the Athlon system. With
> >> telnet in line mode, it'd probably even be decently responsive.
> >
> > I find that difficult to believe.  It seems too high by an order of magnitude.
> I'm not going to claim it would be zippy, but I do think it would work
> acceptably.
> Suppose that 1000 users telnet'ed into the x86 machine, but remained
> essentially idle; what resources would that consume? We'd have 1000
> open TCP connections, a thousand shell processes, a thousand
> telnetd's, etc. 

The early Unix code really did not like stuff like this.  Lots of linear
scans through what were assumed to be short lists.  I still remember an
SGI Challenge being brought to it's knees by a bunch of racks of modems.
The same machine could move a ton of data but not when it was being
forced through a zillion sockets.

Linux seems well past that problem but it's possible that back in the
Athlon days it still sucked.  I pinged Linus, if he remembers when the
kernel got taught to scale on sockets I'll report back.


  reply	other threads:[~2023-03-09 20:09 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <>
2023-03-08 19:52 ` [COFF] Re: [TUHS] " Dan Cross
2023-03-08 20:18   ` [COFF] " Tom Ivar Helbekkmo via COFF
2023-03-09  1:22   ` [COFF] Re: [TUHS] " John Cowan
2023-03-09 19:55     ` Dan Cross
2023-03-09 20:09       ` Larry McVoy [this message]
2023-03-11 20:32         ` Dan Cross
2023-03-11 23:28       ` Bakul Shah
     [not found]   ` <>
2023-03-13 22:34     ` Dan Cross

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:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \ \ \ \ \ \ \

* 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).