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Re: [Discuss-gnuradio] LibUSRP vs LibUHD Performance on older machines
From: |
Josh Blum |
Subject: |
Re: [Discuss-gnuradio] LibUSRP vs LibUHD Performance on older machines |
Date: |
Fri, 01 Mar 2013 16:55:44 -0600 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130106 Thunderbird/17.0.2 |
On 03/01/2013 04:51 PM, Tom Hendrick wrote:
> Hello all,
>
> I've had trouble making a 4 channel USRP samples at 1Ms/s write to file at
> 500 kS/s with ubuntu 12.04 and libuhd. I am getting several overruns and I
> had tried adjusting some of the parameters using usrd_probe_devices but with
> no success. I have a laptop with a duo core centrino processor which should
> be enough.
>
> I've made this 4 channel work successfully with the same exact laptop and
> with ubuntu 10.04 and the older version of gnuradio that uses libusrp. I get
> no underruns at all even for an entire hour of writing to file.
>
>
> Has anyone else experienced performance differences between libusrp and
> libuhd? I just want to make sure it isn't a configuration problem or
> something I'm doing wrong causing the overruns. If its likely an issue with
> libuhd, I guess I will just keep a backup of ubuntu 10.04 and gnuradio
> libusrp version installation files and leave my dual boot setup intact.
>
> Thank you very much, - Tom
>
>
You might try setting a very large output buffer on the usrp source
block. I heard this helps (you should be able to call this in python
after the block constructs):
/*!
* \brief Sets max buffer size on all output ports.
*/
void set_max_output_buffer(long max_output_buffer)
-josh
>
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- [Discuss-gnuradio] LibUSRP vs LibUHD Performance on older machines, Tom Hendrick, 2013/03/01
- Re: [Discuss-gnuradio] LibUSRP vs LibUHD Performance on older machines,
Josh Blum <=
- Re: [Discuss-gnuradio] LibUSRP vs LibUHD Performance on older machines, Tom Hendrick, 2013/03/08
- Re: [Discuss-gnuradio] LibUSRP vs LibUHD Performance on older machines, Josh Blum, 2013/03/11
- Re: [Discuss-gnuradio] LibUSRP vs LibUHD Performance on older machines, Tom Hendrick, 2013/03/11
- Re: [Discuss-gnuradio] LibUSRP vs LibUHD Performance on older machines, Marcus D. Leech, 2013/03/11
- Re: [Discuss-gnuradio] LibUSRP vs LibUHD Performance on older machines, Tom Hendrick, 2013/03/11