From: "Ludovic Courtès" <ludo@gnu.org>
To: Lars-Dominik Braun <ldb@leibniz-psychology.org>
Cc: 41702@debbugs.gnu.org
Subject: bug#41702: `guix environment` performance issues
Date: Wed, 01 Jul 2020 12:49:51 +0200 [thread overview]
Message-ID: <87y2o3zf00.fsf@gnu.org> (raw)
In-Reply-To: <87wo3sjjdw.fsf@gnu.org> ("Ludovic \=\?utf-8\?Q\?Court\=C3\=A8s\=22'\?\= \=\?utf-8\?Q\?s\?\= message of "Sat, 27 Jun 2020 23:20:27 +0200")
Hi,
Ludovic Courtès <ludo@gnu.org> skribis:
> + (when open-connection
> + (let* ((sock (open-connection host port)))
> + ;; Since 'session-set!' doesn't increase the revealed count of SOCK
> + ;; (as of Guile-SSH 0.12.0), do it ourselves.
> + (set-port-revealed! sock 1)
> + (session-set! session 'fd sock)))
The problem with this approach is that ‘open-connection’ is past the raw
host name; aliases, proxy commands, etc. from ~/.ssh/config are ignored.
So it cannot go in as is. :-/
What we need is Guile-SSH bindings for ‘ssh_get_fd’, which would allow
us to get at the actual file descriptor after the connection has been
opened, and to set TCP_NODELAY there:
http://api.libssh.org/stable/group__libssh__session.html#gafe509fcea47714b5cd277d1e35e83276
It’s not 100% clear though if it returns that “right” FD when there’s a
proxy command.
Ludo’.
next prev parent reply other threads:[~2020-07-01 10:51 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-04 8:23 bug#41702: `guix environment` performance issues Lars-Dominik Braun
2020-06-06 16:08 ` Ludovic Courtès
2020-06-06 21:40 ` Ludovic Courtès
2020-06-08 9:04 ` Lars-Dominik Braun
2020-06-08 21:59 ` Ludovic Courtès
2020-06-09 9:15 ` Lars-Dominik Braun
2020-06-27 21:20 ` Ludovic Courtès
2020-06-30 9:59 ` Lars-Dominik Braun
2020-07-01 10:49 ` Ludovic Courtès [this message]
2020-07-01 11:24 ` Lars-Dominik Braun
2020-07-01 21:53 ` Ludovic Courtès
2020-07-02 7:00 ` Lars-Dominik Braun
2020-07-02 12:03 ` Lars-Dominik Braun
2020-07-06 8:49 ` Ludovic Courtès
2020-07-06 12:58 ` Lars-Dominik Braun
2020-07-20 9:50 ` Lars-Dominik Braun
2020-07-20 21:51 ` Ludovic Courtès
2020-10-22 21:03 ` Maxim Cournoyer
2020-10-23 7:26 ` Lars-Dominik Braun
2020-10-23 13:07 ` bug#44175: [optimization] Grafting is too slow Maxim Cournoyer
2020-10-23 21:17 ` Ludovic Courtès
2020-10-25 2:33 ` Maxim Cournoyer
2020-10-25 16:43 ` Ludovic Courtès
2020-10-26 7:56 ` Lars-Dominik Braun
2020-10-23 14:51 ` bug#41702: `guix environment` performance issues Ludovic Courtès
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