[etherlab-users] How to improve performance of the generic driver together with Intel e1000

martin troxler martin.troxler at komaxgroup.com
Fri Apr 29 07:41:55 CEST 2011


The intel e1000 drivers use interrupt throttling to reduce the load for the kernel. However, if you need a bus update rate of > 2kHz you have to disable this throttling, otherwise you will notice lots of missed datagrams. 

To disable or lower this interrupt throttling you can give the driver start parameters: 
1) manually 
      rmmod e1000 
      modprobe e1000 RxIntDelay=0 RxAbsIntDelay=0 InterruptThrottleRate=0 

2) Automagically apply module options (debian systems) 
Create a file /etc/modprobe.d/e1000-disable-irq-throttling.conf that contains 
      options e1000 RxIntDelay=0 RxAbsIntDelay=0 InterruptThrottleRate=0 

With these parameters set we achieve an update rate of 4kHz without dropouts. 


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Thank You.
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