Lee Revell wrote:
On Fri, 2006-06-23 at 12:12 +0200, Pieter Palmers wrote:
If anything else is running at 99, what happens if you lower those other
processes to 98?
I'll have to recheck, but if I remember correcly I have done this
experiment. The only thing at 99 is the system timer. I tried giving it
a lower priority than the latency test thread, which didn't change anything.
OK thanks, that answers my question.
I found one problem at this point, which is in the latency test
application itself. Apparently it doesn't acquire the RT priority
correctly. My mistake.
When trying with rtc_wakeup I get about 40us max. Which is more what I'd
expect.
I'm going to investigate this further anyway, because I'm not really
convinced yet. In one of my previous sessions, rtc_wakeup also showed
large latency values.
TBC
Greets,
Pieter
