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Date: Fri, 29 Nov 2002 02:11:06 +0100
From: thomas <tom AT huno DOT net>
Reply-To: thomas <cygwin AT cygwin DOT com>
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Message-ID: <17317953500.20021129021106@huno.net>
To: cygwin AT cygwin DOT com
Subject: Re: pipe performance problem
In-Reply-To: <5.1.0.14.2.20021128163040.00fdf610@pop3.cris.com>
References: <1988826218 DOT 20021128150740 AT huno DOT net>
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 <20021128003443 DOT GD21457 AT redhat DOT com> <5549457171 DOT 20021128022032 AT huno DOT net>
 <6654089625 DOT 20021128033745 AT huno DOT net> <1988826218 DOT 20021128150740 AT huno DOT net>
 <5 DOT 1 DOT 0 DOT 14 DOT 2 DOT 20021128163040 DOT 00fdf610 AT pop3 DOT cris DOT com>
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Randall R Schulz <rrschulz AT cris DOT com> wrote:

> problem. In particular, you'll need to supply a patch script that will
> allow others to replicate your results and evaluate whether there are any 
> potential problems with your solution that you're might be overlooking.

There's already my problem. I don't consider what i've done to make the
problem dissapear, basically skipping 20 lines of code, a solution. It
is a hack at best. So i cannot offer that to the list.
My skills are limited and i have not much of a clue what is going on
there in the code that i skip, it seems like a bunch of checks and the
resulting 10ms delay. The function name already suggests that it checks
if there is sth. in the pipe, and if not wait 10ms.

Now my hack works perfectly for cat/mkisofs on the one and
cdrecord/cdrdao/dd on the other side of the pipe, but there must've been
a reason why the checks were added, and so it *might* completely brake
another application.

I cannot fix that problem. So i was hoping with the work i've done
someone who is familiar with the code can.

I will post a 4th thread on this summarizing the problem.

thomas


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