[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Discuss-gnuradio] Problems running example audio_fft.py

From: Marcus Leech
Subject: Re: [Discuss-gnuradio] Problems running example audio_fft.py
Date: Mon, 23 Oct 2006 10:15:58 -0400
User-agent: Thunderbird (X11/20060909)

Michael Dickens wrote:

I would be quite curious about the CPU utilization of a Linux box - along with the hardware specs to make the judgement relatively correct. Even better would be to try an Intel Mac running both OSX and Linux and compare the CPU utilization ... hmmm ... that would be pretty cool so I'll look into it. - MLD

I don't know about usrp_wfm..., but my radio astronomy combined spectral/continuum application consumes about 90% CPU when looking at 4Mhz bandwidth, with FFTs of length 2048 and an fft_rate of 12. This is on an FC5 box, with a single Celeron D running at 2.4Ghz, 512M of memory. The fftsink window has to run the FFTs in "sampled" mode in order to get any kind of realtime response at all (that is, the FFT only gets to look at partial data, rather than continuous data). This reduces spectral sensitivity quite a bit, and I'm thinking of revamping my application to reduce the total bandwidth going into the spectral part, in order to improve sensitivity. Continuum sensitivity needs as much bandwidth as possible,
 though :-(

reply via email to

[Prev in Thread] Current Thread [Next in Thread]