Forum: GNU Radio UHD Warning

Hello

I'm using  USRP2 Rev 4.0 with a daughterboard  xcvr2450

When I use the commmand  "uhd_usrp_probe"

I got this message


UHD Warning:
    Unable to set the thread priority. Performance may be negatively
affected.
    Please see the general application notes in the manual for 
instructions.
    EnvironmentError: OSError: error in pthread_setschedparam

What it mean?



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On 14 Nov 2012 12:08, daviko wrote:

> Hello
>
> I'm using USRP2
Rev 4.0 with a daughterboard xcvr2450
>
> When I use the commmand
"uhd_usrp_probe"
>
> I got this message
>
> UHD Warning:
> Unable to
set the thread priority. Performance may be negatively
> affected.
>
Please see the general application notes in the manual for
instructions.
> EnvironmentError: OSError: error in
pthread_setschedparam
>
> What it mean?

It means that giant,
man-eating bats will soon start falling from your ceiling and kill you
and everyone you've ever loved.

Errrr, I mean, it's just a warning
that it wasn't able to set real-time scheduling. Most gnuradio apps try
to turn on real-time scheduling. That can fail, and it's largely
harmless.

Real-time scheduling can help with signal processing flows
that are very CPU intensive, but it cannot help with situations whether
the average CPU demand exceeds the available CPU resources.

For
uhd_usrp_probe, it's utterly meaningless, since it doesn't do any signal
processing, but does do the usual "startup template" which includes
trying to turn on real-time scheduling.

Thank you, Mr. giant ^^



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