On Tue, Feb 11, 2014 at 11:02 AM, Tom Rondeau <t...@trondeau.com> wrote: > On Mon, Feb 10, 2014 at 12:54 AM, Jim Larsen <n7ihq....@gmail.com> wrote: >> The CPU usage of the QT GUI Frequency Sink is much higher than the QT GUI >> Sink. I made a test flow graph with a noise source, throttle, and QT GUI >> Sink using default parameters. I am running GNU Radio version 3.7.0, Xubuntu >> 13.10, on a MacBook with 2.4 Ghz Intel dual core CPU. >> >> QT GUI Frequency Sink CPU usage >> python: 43% >> xorg: 58% >> >> QT GUI Sink CPU usage >> python: 5% >> xorg: 9% >> >> Could this be a bug? >> >> Regards, >> >> Jim Larsen > > Yes, I'm seeing the same thing. There's no good reason for that to be > happening, though. Also, when using performance monitor, I'm seeing > that the qt frequency sink actually takes a smaller percent of the > overall runtime than the the qt sink. So whatever is happening is > occurring outside of the block itself (in the QT and X systems), so > performance monitor doesn't pick it up. > > Yes, this seems like a bug and should definitely be looked into. > > Tom
Hey Jim, I found the issue. It was an excess usage of timers that was calling into the x system way too often, apparently. I've just pushed an update that address the issue and makes a dramatic improvement in the CPU usage. Thanks for pointing this out! Tom _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
