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List: gnuradio-discuss
Subject: Re: [Discuss-gnuradio] USB performance and Win32
From: Eric Blossom <eb () comsec ! com>
Date: 2008-05-05 16:49:00
Message-ID: 20080505164900.GC5838 () comsec ! com
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On Tue, May 06, 2008 at 12:35:19AM +0900, Geof Nieboer wrote:
> Good news, got a basic test version of gnuradio compiled in MSVC 2005,
> included a C# front end. More details can be found on the
> http://www.gnuradio.org/trac/wiki/WindowsNativeInstall page. Most of the
> key C++ code is in there, it will just need more managed interfaces built.
> Right now, it can do one thing and one thing only so far, and that's to run
> a clone of the usrp_benchmark_usb.py code.
>
> It runs without error, but can't exceed 8Mbps. On the same machine running
> Cygwin, it gets the full 32Mbps. The CPU utilization is similar between the
> two versions, under 10%.
>
> The only thing I can see that's different about how the code is running is
> that the MSVC version uses the createfilemapping circular buffer, while
> cygwin (I think?) uses MMAP. Have there been any problems noted with
> createfilemapping?
> Geof
No problems that I know of.
Which FUSB_TECH are you selecting? It's normally computed in config/usrp_fusb_tech.m4
I suspect you may be getting FUSB_TECH_generic. Try FUSB_TECH_win32.
Eric
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