Hi
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.
Regards
Martin
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