| Subject: | Weird processor usage, when redirecing IO to /dev/null |
| Date: | Mon, 2 Mar 2009 19:30:17 +0000 (GMT) |
| To: | bug-Net-SSH-Perl [...] rt.cpan.org |
| From: | Thomas Lorenzen <ki11er_bob [...] yahoo.dk> |
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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