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[Discuss-gnuradio] GRC's graphical sinks performance issues

From: Jack Ott
Subject: [Discuss-gnuradio] GRC's graphical sinks performance issues
Date: Wed, 1 Sep 2010 21:47:55 -0700 (PDT)

Hi there,

I'm having trouble getting hardware acceleration to work with grc's
graphical sinks. With the regular sinks the refresh rate is always choppy
and sluggish until it eventually locks up completely. And when I tried the
OpenGL sinks it turned out they're even slower than the regulars, especially
the FFT Sink in which even the buttons can't be pressed with most my
configurations, though I have to mention that with the OpenGL version the
waveform in the middle of the sink's window is drawn fine, it's just that
the buttons are unclickable. That's when I figured it's a graphics issue and
not due to the cpu. All the other graphically intensive programs work fine
on this machine, so I know I got the driver properly configured.

Anyone having the same issues?
Any help is appreciated

P.S. - My configuration: I'm using the latest gnuradio source code along
with a USRP2 and a WBX board, decimation is at 4, the FFT Sink's bin size is
set at 2048 and its sampling rate is at 1,000,000. The computer is a
Thinkpad X61s with a Core2Duo 1.6GHz processor and an Intel GM965 graphics


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