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

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Message-ID: <20091121232320.3262636c@lxorguk.ukuu.org.uk>
Date:	Sat, 21 Nov 2009 23:23:20 +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

> I can provide reasonably stripped down code which demonstrates the
> problem.  It has been reproduced by one other person, though his delay
> was about 2ms.

I would expect that.

I guess the obvious question would be "why are you using ptys for latency
sensitive communications ?" They now queue like other ttys which fixes a
whole ton of stuff but does mean they have normal tty latencies.

Alan
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