[etherlab-users] EtherCAT master 1.5.1 -- frame rate limited to 250/sec

[Thomas Bitsky Jr]

Hello,

I have 1.5.1 EtherCAT Master running on two machines: one is Intel-Atom based with two e1000e network interfaces, the other is a core i7 with an Intel 82579LM Ethernet interface. The operating system is Ubuntu 10.04LTS running the 2.6.33.7.2-rt30 kernel (RT PREEMPT).

A year ago, I was able to get the EtherLAB EtherCAT master up and running on similar computers with frame rates around 2000/sec. However, despite running the same program from a year ago with the same hardware, I can't get the frame rate to exceed 250/sec on either machine. With both the generic and e1000e drivers, the results are exactly the same (which is odd).

I saw this in the mailing list archives:
[snip]
Now as I understand the product to get an update rate of 10 micro
seconds for a small number of IO (that's what we have) we need to get
the tx frame rate much higher than the standard 250/sec.

[/snip]

Is the frame rate capped at 250/sec? Is there a setting I need to change, or some configuration I can modify? I suspect there is something easy and stupid I am overlooking, but I'm at a loss.

Thanks in advance for any feedback.

Thanks
Tom

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.etherlab.org/pipermail/etherlab-users/attachments/20130630/ae2f2b8a/attachment-0003.htm>