Thank you for your answer. Am 2010-07-19 22:06, schrieb Eric Blossom: > > Flow control is handled at the link level using ethernet PAUSE frames.
I was not aware of this ethernet "feature". Having learned something new. > > Be sure to enable real-time scheduling by calling > > if gr.enable_realtime_scheduling() != gr.RT_OK: > print "Note: failed to enable realtime scheduling, continuing" > > before starting or running the flow graph. > > If you haven't already, ensure that /etc/security/limits.conf contains > this line: > > @usrp - rtprio 50 > > and that you are a member of group "usrp". Made everyting as told, but still no success. Another observation I have made: I am using two kernels from the ubuntu 10.04 LTS distro: 2.6.32 generic and 2.6.31 rt It is interesting that the generic kernel does better than the rt kernel. I.e. the rt is practically unusable at interpolation 4. The generic does quite well for a while, then suddenly drops off. Btw.: I am using the e1000e driver for intel cards. Possibly it may be an issue with the driver? Do you have an idea how I could find out whether my problems are because of buffer overrun or underrun? Regards Roland -- _________________________________________ _ _ | Roland Schwarz OE1RSA |_)(_ | sip:[email protected] | \__) | mailto:[email protected] ________| http://www.blackspace.at _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
