(Glad to see we're back on line...)
Hello, I recently switched up to linux2.2.13 & NM rtl-2.0.
Prior to the upgrade, I had linux2.2.10 & NM rtl-Beta11 running
a neuron control algorithm, written entirely in 32-bit integer math,
running at 10kHz.
With the upgrade, I switched to floating point math, and found input/
output latencies extending beyond 100us -- which doesn't mesh well
with 10kHz operation :-(. Upon switching back to integer math, I find
that my latency/jitter combo occasionally still extends beyond 100us, even
when I remove everything computationally expensive from the periodic
algorithm. (The only thing I'm doing is reading a single channel of a daq
board - maybe I should check comedi driver???)
Looking further into the problem, I examine the # of clock ticks I have
left after each cycle period - it's always a multiple of 32 (from
rt_get_time). Prior to switching versions, I remember getting single tick
precision.
Thought I'd see if any of you had some quick advice, thanks--
Chuck
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