Hi, Today was a day-mare for me. I had to reformat/install gnuradio on my PC 3 times in few hours.
The story begins when I tried to upgrade my nice working Ubuntu 8.10 OS to the new 9.04 on my old 3.0GHz C2D system (2G RAM). I had an application which needs much CPU performance. The application is doing a streaming 1024 point FFT with 25MSps on USRP2. The application was consuming about 50% from my CPU (both). That was with Ubuntu 8.10 32 bit + python 2.5 + original USRP2 firmware ( I think 9936) + gnuradio 10368. When 9.04 came, I wanted to upgrade my system and even I came with an idea to use the 64 bit version with my C2D system. So I reformatted/installed Ubuntu 9.04 64 bit + python 2.6 + installed latest USRP2 firmware (10766) + gnuradio 10945. Every thing was OK. The surprise was when I started my same application, but its now consuming about 90% from my CPU!!!. I shocked. I couldn't figure out what was the problem because I changed many variables at a time. To debug the problem, I reformatted/installed Ubuntu 9.04 32 bit + python 2.6 + same USRP2 firmware (10766) + gnuradio 10945. This time the CPU utilization was 75%. So may be this is a bad OS + GNURadio interaction. To be sure, I reformatted/installed back the Ubuntu 8.10 32 bit + python 2.5 + USRP2 firmware (10766) + gnuradio 10945. When checked with the same application, my CPU utilization was back to 50% and I'm very happy now. I thought sharing it may be useful to gnuradio developers. Any suggestions/speculations ???? Best Regards, Firas -- View this message in context: http://www.nabble.com/Weired-GNURADIO-Performance-tp23346500p23346500.html Sent from the GnuRadio mailing list archive at Nabble.com. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
