From: ludovic.courtes@inria.fr (Ludovic Courtès)
To: Andy Wingo <wingo@igalia.com>
Cc: guix-devel@gnu.org
Subject: Re: RPC performance
Date: Fri, 23 Jun 2017 11:24:50 +0200 [thread overview]
Message-ID: <87y3sjawf1.fsf@inria.fr> (raw)
In-Reply-To: <cuc7f03kr3w.fsf@igalia.com> (Andy Wingo's message of "Fri, 23 Jun 2017 11:09:23 +0200")
Hi Andy,
Andy Wingo <wingo@igalia.com> skribis:
> On Thu 22 Jun 2017 18:05, ludovic.courtes@inria.fr (Ludovic Courtès) writes:
>
>> Andy Wingo <wingo@igalia.com> skribis:
>>
>>> Why not just set to _IOFBF and let Guile 2.2's buffering handle it?
>>
>> Because we want controlled buffering when writing (we need to flush
>> pending output when we’re done writing the RPC request), and no
>> buffering at all when reading.
>
> For controlling output buffering, there is the setvbuf buffer size, and
> "force-output". In Guile 2.2 the CBOP's "write" function is really a
> "flush" function -- it only gets called when the internal buffer is
> filled, or when flush-output is called, or (for line-buffered ports)
> when a newline is written.
>
> Why do you not want buffering when reading? Do you need to hand off
> this FD to some other process?
With the current protocol, often we’re just reading a handful of bytes.
Full buffering would mean that Guile would block on an 8K read or so
that will never be fulfilled.
Ludo’.
next prev parent reply other threads:[~2017-06-23 9:25 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-27 10:56 bug#27097: [PATCH] gnu: Add emacs-direnv Christopher Baines
2017-05-27 11:31 ` Combining Guix, direnv and Emacs for environment customisation Christopher Baines
2017-05-30 15:03 ` Ludovic Courtès
2017-05-30 15:03 ` bug#27097: " Ludovic Courtès
2017-06-01 13:17 ` Roel Janssen
2017-06-03 13:59 ` Ludovic Courtès
2017-06-03 13:59 ` bug#27097: " Ludovic Courtès
2017-06-03 21:08 ` Roel Janssen
2017-06-04 21:15 ` Ludovic Courtès
2017-06-04 21:15 ` bug#27097: " Ludovic Courtès
2017-06-05 22:37 ` Roel Janssen
2017-06-07 10:35 ` Performance on NFS Ludovic Courtès
2017-06-07 13:06 ` Roel Janssen
2017-06-09 13:46 ` Ludovic Courtès
2017-06-12 8:45 ` Roel Janssen
2017-06-12 8:45 ` [bug#27097] " Roel Janssen
2017-06-12 15:58 ` Ludovic Courtès
2017-06-16 15:23 ` Ludovic Courtès
2017-06-17 7:36 ` Roel Janssen
2017-06-17 22:40 ` Ludovic Courtès
2017-06-17 23:15 ` Roel Janssen
2017-06-18 8:43 ` Ricardo Wurmus
2017-06-19 8:01 ` RPC performance Ludovic Courtès
2017-06-19 8:15 ` Ludovic Courtès
2017-06-19 14:25 ` Ricardo Wurmus
2017-06-22 14:03 ` Andy Wingo
2017-06-22 16:05 ` Ludovic Courtès
2017-06-23 9:09 ` Andy Wingo
2017-06-23 9:24 ` Ludovic Courtès [this message]
2017-06-23 9:46 ` Andy Wingo
2017-06-26 11:54 ` Ludovic Courtès
2017-06-26 14:19 ` Andy Wingo
2017-06-19 21:25 ` Ludovic Courtès
2017-06-22 8:04 ` Ricardo Wurmus
2017-06-07 11:01 ` Combining Guix, direnv and Emacs for environment customisation Ricardo Wurmus
2017-06-07 12:25 ` Performance on NFS Ludovic Courtès
2017-06-07 12:59 ` Ricardo Wurmus
2017-06-07 12:59 ` bug#27097: " Ricardo Wurmus
2017-08-29 19:02 ` Combining Guix, direnv and Emacs for environment customisation Thompson, David
2017-08-29 22:30 ` Maxim Cournoyer
2017-08-30 5:52 ` Carlo Zancanaro
2017-08-30 10:09 ` Ludovic Courtès
2017-08-30 10:16 ` Ludovic Courtès
2017-05-28 20:09 ` bug#27097: [PATCH] gnu: Add emacs-direnv Ludovic Courtès
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