Re: [Ssh-sftp-perl-users] Weird processor usage, when redirecing IO to /dev/null

[Nigel R. <ni...@sy...>]

I had a similar issue. Doing a search, there was another module that
should be installed to speed things up. It was either Math::BigInt and/or
Math::BigInt::GMP

Try installing those and see if it makes a difference.

Regards
Nigel

Thomas Lorenzen wrote:
>
> Hi'
>
>
>
> I am targeting a simple perl loop, in which I with ssh->cmd will
> execute a command on a remote host. This code should run in the back
> ground on the mother host.
>
>
>
> The following simple code shows my observation.
>
>
>
> #####
>
> use Net::SSH::Perl;
>
>
>
> $host = Net::SSH::Perl->new("remotehost");
>
> $host->login();
>
>
>
> while (1) {
>
>     print `date`;
>
>     ($out, $err, $exit) = $host->cmd("sleep 10");
>
> }
>
> #####
>
>
>
> Now, call the code test.pl and run "./test.pl". Command "top" running
> in another shell on the mother host does not show anything suspicious.
> Now I would like to have the code running in the background and thus I
> do "./test.pl </dev/null 1>/dev/null 2>/dev/null &". Now
> the "top" command shows my little program eating up one full processor.
> This puzzles me very much indeed and I am speculating, if this is a bug
> or a feature.
>
>
>
> Thanks for any help in advance.
>
>
>
> Best regards.
>
>
>
> Thomas.
>
>
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-- 
Nigel Reed
Candidate for Lieutenant Governor of Marketing 2009-2010

President & CEO Sysadmin, Inc
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