1 Reply Latest reply on Feb 28, 2011 2:40 PM by mark_h_@intel

    constant Latency


      I am using ether net controller 82574L on supermic MB - X8DT6-F .

      we tested the altency with Lmbench we got 64ms.

      even ping is also giving min of 64ms.

      But now the problem is  that the latency which we are getting is  not constant it is varying on every run.

      it is varying from 64- 130 ms.

      we need is  a constant latency ( my program stops  working if latency changes time to time ).

      even we used "InterruptThrottleRate=0" as driver option  but tat did worked.

      where we have simpler setup on Broadcom Ethernet it is giving constant latency. ( where latency is  high 96ms)

      these the OS and driver details

      OS Centos 5.4(2.6.18-164.el5 #1 SMP)

      Driver version : e1000e-1.2.20


      can any one  plz help me to sort out the issue .


      i need a content latency all the time.



      Thanks in advance.