Net::Ping duration question

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

Hi

I will make this quick. I'm following the example right out of the description page.

while ( 1 ) {

        my $ret;
        my $duration;
        my $ip;

        ( $ret, $duration, $ip ) = $p->ping( $host, 5.5 );

        printf( "$host [ip: $ip] is alive (packet return time: %.2f ms
+)\n", 1000 * $duration );
}
[download]

The result I get back for $duration * 1000 is either 0 or 1000 ms. The problem is, the host I'm using has an average ping time of 127ms, so something just isn't adding up. Am I missing something?

Comment on Net::Ping duration question Download Code

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Re: Net::Ping duration question by frozenwithjoy (Priest) on Jun 21, 2012 at 05:29 UTC
Which version of perl do you have? More specifically, is Time::HiRes part of your core? It should be unless you are on a Commodore64 or something else from my childhood... If so, this should fix your problem: `$p->hires();`. Put it right after `$p = Net::Ping->new();`	[reply] [d/l] [select]
Re^2: Net::Ping duration question by Anonymous Monk on Jun 21, 2012 at 06:03 UTC
That did it, thanks. I got no error so assumed Time:HiRes was there, but didn't see I needed to make that call. All bueno now!	[reply]
Re^3: Net::Ping duration question by frozenwithjoy (Priest) on Jun 21, 2012 at 06:11 UTC
Perfect! By the way, if you print out `$ret`, what do you get? I keep getting 0, even though I'm getting realistic duration values. I was under the impression that I'd get `$ret == 1` if the host was reachable.	[reply] [d/l] [select]
Re: Net::Ping duration question by NetWallah (Canon) on Jun 21, 2012 at 05:34 UTC
Try setting `$p->hires(1);` [download] before the ping call. This will cause Net::Ping to use Time::HiRes, and return a Float, instead of using normal (1 second) resolution, and returning an Integer. Of course, this requires Time::HiRes to be installed/available. Update: Dang - frozenwithjoy (++) has a higher Res, and beat me to the punch. I hope life isn't a big joke, because I don't get it. -SNL	[reply] [d/l]
Re^2: Net::Ping duration question by frozenwithjoy (Priest) on Jun 21, 2012 at 05:54 UTC
Come on up here with me. There's plenty of glory to go around and no one I'd rather share it with more than you! edit: Oh noes! down-voted! I guess I better stop enjoying myself while I'm spending my time helping people out. ^___^	[reply]
Re^3: Net::Ping duration question by NetWallah (Canon) on Jun 21, 2012 at 06:03 UTC
Its past my bedtime now, so I'll let you bask!. Thanks for the invite, and Cheers! We'll play again on the morrow. I hope life isn't a big joke, because I don't get it. -SNL	[reply]
Re^4: Net::Ping duration question by frozenwithjoy (Priest) on Jun 21, 2012 at 06:08 UTC