linux-kernel - Re: [bisected] pty performance problem

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Message-ID: <20091122122942.644006fb@lxorguk.ukuu.org.uk>
Date:	Sun, 22 Nov 2009 12:29:42 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	swan.r.l@...il.com
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [bisected] pty performance problem

> While I could rewrite the communications to optionally use pipes, or
> get the client to reprocess a log file locally, what I have does seem
> a reasonable use of ptys.

Wouldn't argue with that. The tty layer queues the characters which then
get processed but at the moment get processed after the next timer tick
not when the CPU is idle. That wants changing and it strikes me as utterly
dumb in general to be deferring work when the CPU is idle.

Alan

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