Re: [Discuss-gnuradio] oprofile inband code results

[Johnathan Corgan]

George Nychis wrote:

> So it looks like there is a lot of time spent scheduling the threads in
> the kernel.  We're not concerned about optimizing the application itself.

Not really.

Look at just the functions that take up more than 1% of CPU time (the
bottom 21 lines.)  These total about 70% of the overall time spent.  Of
these (approximate numbers)

26% libm, libc or libstdc++
19% libpmt
12% test_usrp_inband_tx
 5% libusrp-inband
 5% vmlinux or usbcore
 3% libmblock

So it doesn't appear whatever performance issue you are seeing is
directly related to CPU time spent in the kernel.  I have some other
ideas for profiling but don't have the time until later today perhaps to
email to you.

-- 
Johnathan Corgan
Corgan Enterprises LLC
http://corganenterprises.com