From: Glynn Clements <glynn.clements@virgin.net>
To: "William N. Zanatta" <william@veritel.com.br>
Cc: linux-c-programming@vger.kernel.org
Subject: Re: select() and pipes
Date: Thu, 28 Nov 2002 15:31:01 +0000 [thread overview]
Message-ID: <15846.14005.704447.246508@cerise.nosuchdomain.co.uk> (raw)
In-Reply-To: <3DE62CCE.2070003@veritel.com.br>
William N. Zanatta wrote:
> I'm writing a tiny program which gets its input from a pipe. It works
> with apache like in this example...
>
> ------ httpd.conf-------
>
> CustomLog "|/path/my/bin"
>
> ------ httpd.conf-------
>
> On apache2 it works pretty well but on 1.3 series I'm experiencing
> some problemas and one of them is the CPU Load. The program's main()
> used to live in a infinite loop making a fgets() and checking for data
> availability on the returned buffer.
>
> Well, guessing this is the main reason for the CPU Load, I started
> with select() to check for data availability and I've found that the
> couple select() and the pipe as stdin will always return a ready to read
> status even if there's no data to be read.
How exactly are you using select()? Are you initialising the fd_set
correctly? Are you specifying a timeout?
Is there any reason why you can't just perform blocking reads?
--
Glynn Clements <glynn.clements@virgin.net>
prev parent reply other threads:[~2002-11-28 15:31 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-11-28 14:48 select() and pipes William N. Zanatta
2002-11-28 15:31 ` Glynn Clements [this message]
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