On 07/04/2017 05:22 PM, sam sokolik wrote:
Well - I have been playing with debian stretch and
4.9.0-3-rt kernel. I booted our matsuura (j1900 quad
core) which with no tweeking has aprox 100us latency. (it
has been running mesa ethernet cards with rt_preempt - no
issues) Next I booted it with some kernel line tweaks.
(checking the hardware - processors 0,1 and 2,3 share
cache. So I added
isolcpus=2,3 idle=poll
The latency on this system was phenomenal. It has been
running for hours now and still <6us
6 us is quite good, although RTAI can do better on some
boxes. But, 6 us is probably good for most interfaces.
Jon
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