Inconsistant Net::Ping on XP

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

I am using something like this to ping other hosts:

use strict;
use Net::Ping;
use Time::HiRes;

my $p = Net::Ping->new("icmp");
$p->hires();
while (1) {
    my ($ret, $duration, $ip) = $p->ping($host, 5);
    printf "02d:%02d:%02d,%d,%.0f\n",
           $hour,$min,$sec,$ret,$duration*1000;
    sleep 3;
}
[download]

This seems pretty close to the icmp example in the docs.

I get results of generally 16 ms or 0 ms. I never get a non-0 number less than 16 (and I get larger numbers in rough multiples of 16. So this looks like a Win32 issue of time granularity.

Is there something I can do?

Thanks, --traveler

Update: From reading lots of four-year-old posts here it seems that I have an old hires.dll, even though I have perl 5.8.1. Where do I get a new dll?

Comment on Inconsistant Net::Ping on XP Download Code

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Re: Inconsistant Net::Ping on XP by BrowserUk (Patriarch) on Nov 23, 2007 at 23:06 UTC
Which version of Time::HiRes do you have. There was a problem with older versions, but from memory that was 2 or 3 years ago. Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error. "Science is about questioning the status quo. Questioning authority". In the absence of evidence, opinion is indistinguishable from prejudice. "Too many [] have been sedated by an oppressive environment of political correctness and risk aversion."	[reply]
Re^2: Inconsistant Net::Ping on XP by traveler (Parson) on Nov 23, 2007 at 23:32 UTC
I stuck in the new version with ppm. Perl clearly finds it, but can't use it. I get the error `Time::HiRes object version 1.52 does not match $Time::HiRes::XS_VERSIO +N 1.87 at C:/Perl/lib/DynaLoader.pm line 249. Compilation failed in require at C:\John\tools\netcsvdata.pl line 4. BEGIN failed--compilation aborted at C:\John\tools\netcsvdata.pl line +4.` [download] So this seems to mean that the 1.87 pm file is trying to use some object version of the old 1.52. I've not had this error before? What do I do? Thanks.	[reply] [d/l]
Re^3: Inconsistant Net::Ping on XP by syphilis (Archbishop) on Nov 24, 2007 at 02:39 UTC
Looks like a bungled installation. You've got version 1.87 of HiRes.pm, but version 1.52 of HiRes.dll. PPM doesn't usually produce this sort of problem ... try doing the 'ppm install Time-HiRes' again. (You might need to `ppm remove Time-Hires` first.) Cheers, Rob	[reply] [d/l]
Re^3: Inconsistant Net::Ping on XP by BrowserUk (Patriarch) on Nov 24, 2007 at 02:43 UTC
I stuck in the new version with ppm. PPM doesn't (usually) make that kind of mistake, so perhaps you would explain what you actually did? Where did you find the 1.87 ppd? What command(s) did you use to install it? Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error. "Science is about questioning the status quo. Questioning authority". In the absence of evidence, opinion is indistinguishable from prejudice. "Too many [] have been sedated by an oppressive environment of political correctness and risk aversion."	[reply]
Re^4: Inconsistant Net::Ping on XP by traveler (Parson) on Nov 24, 2007 at 16:25 UTC
Re^2: Inconsistant Net::Ping on XP by traveler (Parson) on Nov 23, 2007 at 23:15 UTC
I have 1.52. ppm found a newer one and I will try upgrading that. In an old post you mentioned updating the dll. I will see if the new Time::HiRes fixes things. Thanks.	[reply]
Re^3: Inconsistant Net::Ping on XP by BrowserUk (Patriarch) on Nov 23, 2007 at 23:29 UTC
I see cpan has 1.97, but (again from memory) version 1.68? comes to mind. If you can't find a version newer than that as a ppm and you don't have the option to build the cpan version, /msg me and I'll send you a zip file. Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error. "Science is about questioning the status quo. Questioning authority". In the absence of evidence, opinion is indistinguishable from prejudice. "Too many [] have been sedated by an oppressive environment of political correctness and risk aversion."	[reply]