Re: [Discuss-gnuradio] question about print out of overrun and under run indication

[Tom Rondeau]

On Fri, Jun 8, 2012 at 11:27 PM, Stephen <address@hidden> wrote:
>
> Hi,
>
> I have a couple of questions about the print out of the overrun and
> underun indications.
>
> Is it possible to turn off the output of those indications?

Not yet. I'm actually working on something that should help us control
this information better. I can't guarantee a time on its availability,
though.


> And second is gnuradio doing anything with stdout that would affect
> redirecting stdout?
>
> This is the text output I normally see in a shell window.
> (I don't see the ----- lines that just to separate the text)
>
> -----------------------------------------------
>
> -- USRP-B100 clock control: 10
> --   r_counter: 2
> --   a_counter: 0
> --   b_counter: 20
> --   prescaler: 8
> --   vco_divider: 5
> --   chan_divider: 5
> --   vco_rate: 1600.000000MHz
> --   chan_rate: 320.000000MHz
> --   out_rate: 64.000000MHz
> --
>
> 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
>
> UHD Warning:
>    The hardware does not support the requested RX sample rate:
>    Target sample rate: 2.500000 MSps
>    Actual sample rate: 2.461538 MSps
>>>> gr_fir_ccc: using SSE
>>>> gr_fir_fff: using SSE
> Using Volk machine: sse4_1_64_orc
>
> ------------------------------------------------
>
> In my application I redirect stdout to a different buffer. Which works
> at first. I get the following redirected to my buffer
>
> ----------------------------
>
> -- USRP-B100 clock control: 10
> --   r_counter: 2
> --   a_counter: 0
> --   b_counter: 20
> --   prescaler: 8
> --   vco_divider: 5
> --   chan_divider: 5
> --   vco_rate: 1600.000000MHz
> --   chan_rate: 320.000000MHz
> --   out_rate: 64.000000MHz
> --
>
> --------------------------------
>
> after that nothing is redirected and everything goes back to being
> output in the shell window. I'm not an expert on redirecting stdout but
> is there anything in gnuradio that would make that stop working?
>
> stephen


There is also stderr, where a lot of this information is printed, too.
You'll want to redirect both stdout and stderr together to suppress
everything ("program &> /dev/null"  will do it or "program > /dev/null
2>&1").

Tom