[ts-7000] Inconsistent usleep and ITIMER_REAL

["MrRealityCheck" <>]

So, I've been using a 3.0.4 kernel from ynezz/mcrapet tweaked for a 7350 for a 
while now.  I also set the kernel HZ to 1000 so I could get close to 
millisecond timing.  That's been working fine.  usleep is pretty consistent.  
Also, ITIMER_REAL has been pretty consistent.  I've used this to check the 
kernel frequency with some code I found via google.  The Hz value hovers around 
980 Hz.  Plus or minus less than 5%.

Now, I wanted to upgrade the kernel.  I started with stock 3.5.7 and attempted 
to apply the 7350 specific and TS board specific stuff e.g. the SD card 
drivers.  When I build the kernel however, my kernel frequency becomes really 
unpredictable varying from as little as 450 Hz to as much as 950 Hz.  Both 
usleep and ITIMER_REAL are affected.  I can't figure out what I'm doing wrong 
or if the kernel code itself is to blame.  I've tried a 3.6.6 kernel and I've 
tried ynezz's 3.3.8 kernel as well.  It's possible I missed something because 
the ynezz code doesn't have 7350-specific stuff.

Any ideas?  I've posted something about this to Linuxquestions but have yet to 
get a response.



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