----- Original Message ----- From: "Gallun, Benton" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Cc: "'Mark Zvolanek'" <[EMAIL PROTECTED]> Sent: Monday, February 11, 2002 7:57 PM Subject: RE: Latency testing
> After a some struggle with my local firewall and such, I have installed > Time::Hires and have placed Mark's code into a single Ping.pl script. Thank > you Mark. > > However, I am having trouble getting sensical data based by IP, instead I am > forced to use alpha names. > > Thanks, > B A ping will always take longer if the machine has to look up the I.P. address from the DNS server. On a LAN, the latency should be VERY close to 0. The elapsed time you're measuring includes the time it takes for Net::Ping to run, look up the I.P. address, connect to the machine, close the connect etc... I once saw some code which packed an I.P. packet with a time stamp, sent it out requesting a response packet with a time stamp, and then calculated the latency from the packet outgoing, and it's return. This will give you a accurate measurement of the network latency. Unfortunately, I have no idea where I saw the code, but I do recall it was in C, not Perl. ego Edward G. Orton, GWN Consultants Inc. Phone: 613-764-3186, Fax: 613-764-1721 email: [EMAIL PROTECTED] _______________________________________________ Perl-Win32-Admin mailing list [EMAIL PROTECTED] To unsubscribe: http://listserv.ActiveState.com/mailman/mysubs
