Re: [Discuss-gnuradio] GNURadio and Parrallel Computing

2012-01-24 Thread Tom Rondeau
On Tue, Jan 24, 2012 at 4:00 PM, Alex Zhang wrote: > And I remember that > Eric > Blossom > has a paper describing the GNURadio scheduler on parallel architecture. > But I don't remember the pap

Re: [Discuss-gnuradio] Try to improve E100's performance at high sample rate

2012-01-24 Thread Philip Balister
On 01/24/2012 01:43 PM, ziyang wrote: > On 01/24/2012 07:12 PM, Nick Foster wrote: >> On Tue, Jan 24, 2012 at 9:56 AM, ziyang > > wrote: >> >> On 01/19/2012 07:13 PM, Nick Foster wrote: >> >> Optimizing an algorithm is a hard and sometimes >> counterintuit

Re: [Discuss-gnuradio] GNURadio and Parrallel Computing

2012-01-24 Thread Alex Zhang
And I remember that Eric Blossom has a paper describing the GNURadio scheduler on parallel architecture. But I don't remember the paper name. On Tue, Jan 24, 2012 at 2:55 PM, Alex Zhang wrote:

[Discuss-gnuradio] GNURadio and Parrallel Computing

2012-01-24 Thread Alex Zhang
Hi, We want to fully utilize the multi-core/GPU archtecture to implement the GNURadio based signal processing flow. Are there any official materials summarizing the usage for the so-called TPB (thread-per-block) mechanism in the GNURadio community? Or related papers are also appreciated. -- Ale

Re: [Discuss-gnuradio] Changing the value of a Python Variable into a block

2012-01-24 Thread Josh Blum
On 01/24/2012 10:42 AM, André Selva wrote: > Hello! > > I'm developing a TV enconder, and I need to extract information from my > input data, and this will be used to determine the parameters of other > blocks on the flow graph. > How can I change the value of a variable of the python (or grc) e

[Discuss-gnuradio] Changing the value of a Python Variable into a block

2012-01-24 Thread André Selva
Hello! I'm developing a TV enconder, and I need to extract information from my input data, and this will be used to determine the parameters of other blocks on the flow graph. How can I change the value of a variable of the python (or grc) environment from the block general_work() method? Thanks!

Re: [Discuss-gnuradio] Try to improve E100's performance at high sample rate

2012-01-24 Thread ziyang
On 01/24/2012 07:12 PM, Nick Foster wrote: On Tue, Jan 24, 2012 at 9:56 AM, ziyang > wrote: On 01/19/2012 07:13 PM, Nick Foster wrote: Optimizing an algorithm is a hard and sometimes counterintuitive process. You might benchmark the following:

Re: [Discuss-gnuradio] Try to improve E100's performance at high sample rate

2012-01-24 Thread Almohanad Fayez
I haven't used VOLK with the OMAP processor but from my experience with the E100 every multiplication and/or division in your flowgraph counts ... When I was working on my C64x+ DSP based FM receiver on the E100 I was moving individual blocks 1-by-1 from the GPP to the DSP and almost every mult

Re: [Discuss-gnuradio] Try to improve E100's performance at high sample rate

2012-01-24 Thread Evan Merewether
Has anybody looked at using the CORDIC approximation for atan2? Depending on the required accuracy, this may dramatically improve performance in your C code. Ultimately, you can implement the CORDIC functions in the FPGA (quasi math-coprocessor style) which would then give you the fastest possibl

Re: [Discuss-gnuradio] Try to improve E100's performance at high sample rate

2012-01-24 Thread Nick Foster
On Tue, Jan 24, 2012 at 9:56 AM, ziyang wrote: > On 01/19/2012 07:13 PM, Nick Foster wrote: > >> Optimizing an algorithm is a hard and sometimes counterintuitive process. >> You might benchmark the following: >> >> - Gnuradio's atan2 WITHOUT any Volk multiplications (just comment out the >> volk

Re: [Discuss-gnuradio] Try to improve E100's performance at high sample rate

2012-01-24 Thread ziyang
On 01/19/2012 07:13 PM, Nick Foster wrote: Optimizing an algorithm is a hard and sometimes counterintuitive process. You might benchmark the following: - Gnuradio's atan2 WITHOUT any Volk multiplications (just comment out the volk mults in your block) - The Volk multiplications WITHOUT Gnuradi

Re: [Discuss-gnuradio] UHD, USRP1, and Twin WBX's

2012-01-24 Thread Josh Blum
On 01/24/2012 07:41 AM, Iain Young, G7III wrote: > Hi Guys, > > I have a USRP1, with a two WBX boards installed. I'm trying to use the > UHD source to get a stream from both WBX boards at the same time in > grc. > > Do I need two UHD sources in my flow graph ? Or is there a way to get > a singl

[Discuss-gnuradio] UHD, USRP1, and Twin WBX's

2012-01-24 Thread Iain Young, G7III
Hi Guys, I have a USRP1, with a two WBX boards installed. I'm trying to use the UHD source to get a stream from both WBX boards at the same time in grc. Do I need two UHD sources in my flow graph ? Or is there a way to get a single UHD Source to give me two outputs in the way I want ? Any one kn

Re: [Discuss-gnuradio] Building 3.5.1 release with Cmake

2012-01-24 Thread mleech
For building from HEAD, there's always "build-gnuradio" -- for Ubuntu and Fedora. On Tue, 24 Jan 2012 10:14:32 -0500, Tom Rondeau wrote: > On Tue, Jan 24, 2012 at 10:03 AM, Barry Jackson wrote: > >> On 24/01/12 14:05, Tom Rondeau wrote: >> >>> On Tue, Jan 24, 2012 at 7:30 AM, Barry Jacks

Re: [Discuss-gnuradio] Building 3.5.1 release with Cmake

2012-01-24 Thread Tom Rondeau
On Tue, Jan 24, 2012 at 10:03 AM, Barry Jackson wrote: > On 24/01/12 14:05, Tom Rondeau wrote: > >> On Tue, Jan 24, 2012 at 7:30 AM, Barry Jackson > > wrote: >> >>I would like to use Cmake to build the 3.5.1 release, however the >>tarball has no CMakeLists.txt f

Re: [Discuss-gnuradio] Building 3.5.1 release with Cmake

2012-01-24 Thread Barry Jackson
On 24/01/12 14:05, Tom Rondeau wrote: On Tue, Jan 24, 2012 at 7:30 AM, Barry Jackson mailto:zen25...@zen.co.uk>> wrote: I would like to use Cmake to build the 3.5.1 release, however the tarball has no CMakeLists.txt files. The project AFAICT seems generally to be Cmake enabled, is th

Re: [Discuss-gnuradio] Building 3.5.1 release with Cmake

2012-01-24 Thread Tom Rondeau
On Tue, Jan 24, 2012 at 7:30 AM, Barry Jackson wrote: > I would like to use Cmake to build the 3.5.1 release, however the tarball > has no CMakeLists.txt files. > The project AFAICT seems generally to be Cmake enabled, is there a reason > for excluding the tarballs? > Any help would be appreciate

[Discuss-gnuradio] Building 3.5.1 release with Cmake

2012-01-24 Thread Barry Jackson
I would like to use Cmake to build the 3.5.1 release, however the tarball has no CMakeLists.txt files. The project AFAICT seems generally to be Cmake enabled, is there a reason for excluding the tarballs? Any help would be appreciated. ___ Discuss-gn

Re: [Discuss-gnuradio] looking for some soundcard based py-files

2012-01-24 Thread Martin Braun
On Tue, Jan 24, 2012 at 08:19:26AM +0100, Michael Renner wrote: > Moin, > > is there something that give me a function generator for the computer build > in > sound card? Or a sound card based oscilloscope or spectrum analysis? Start with GRC and the Sound Source. Then connect whatever graphica