TCP latency os send packets

[ycohen]

Hello

In my system (Win-XP) we send a small tcp packet (112b) every 40 mili-sec. Using a SW sniffer, we observed that the packets are grouped together and hence are send in a delay (there is 40msec diff between every two packets). We set to "off" the nagle algorithm using TCP_NO_DELAY option, but still we observed that grouping phenomena that effects badly the latency. Any ideas?

Thanks

Yossi

 

[avilov]

do you run QOS packet scheduler service on the interrface? it might mess with times

 

[ycohen]

QoS packet tagging is set to Disabled on that interface

 

[technome]

If the destination is a remote network..
Run the Pathping command from source to destination, with clean lines and no limiting routers you should have extremely few, if any, lost packets.

Locally, all Ethernet runs should be tested with a tester capable of certifying the wire runs, one bad cable can cause major delays..same goes for a bad NIC, very rare.


........................................
Chernobyl disaster..a must see pictorial

http://www.kiddofspeed.com/default.htm