I think I have isolated the issue to uhd. I used the following procedure
and the benchmark_rx_rate test program appears to show the issue I've been
experiencing. I have performed the same test with a USRP2 and a WBX
daughterboard and no errors occurred.
git clone git://code.ettus.com/ettus/uhd.git
cd {UHD_ROOT}
git remote update
git branch --track next origin/next
git checkout next
cd {UHD_ROOT}/host
mkdir build
cd build
cmake ../
make
make test
sudo make install
sudo ldconfig
cd /usr/local/share/uhd/examples
./benchmark_rx_rate
linux; GNU C++ version 4.4.1; Boost_103800; UHD_003.20110226000831.77641c6
Creating the usrp device with: ...
Current recv sock buff size: 50000000 bytes
mboard0 MIMO master
Using Device: Single USRP:
Device: USRP2/N Series device
Mboard 0: USRP-N210 mboard
RX DSP 0: USRP-N210 ddc0
RX Channel: 0
RX Dboard: USRP-N210 dboard (rx unit)
RX Subdev: RFX2200 (0x002c)
TX DSP 0: USRP-N210 duc0
TX Channel: 0
TX Dboard: USRP-N210 dboard (tx unit)
TX Subdev: RFX2200 (0x002d)
Testing receive rate 0.500000 Msps (10.000000 second run)
Error code: 1
Unexpected error on recv, exit test...
Testing receive rate 1.000000 Msps (10.000000 second run)
Error code: 1
Unexpected error on recv, exit test...
Testing receive rate 2.000000 Msps (10.000000 second run)
Error code: 1
Unexpected error on recv, exit test...
Testing receive rate 4.000000 Msps (10.000000 second run)
Error code: 1
Unexpected error on recv, exit test...
Warning:
The hardware does not support the requested RX sample rate:
Target sample rate: 8.000000 MSps
Actual sample rate: 8.333333 MSps
Testing receive rate 8.333333 Msps (10.000000 second run)
Error code: 1
Unexpected error on recv, exit test...
Testing receive rate 16.666667 Msps (10.000000 second run)
Error code: 1
Unexpected error on recv, exit test...
Warning:
The hardware does not support the requested RX sample rate:
Target sample rate: 33.333333 MSps
Actual sample rate: 25.000000 MSps
Testing receive rate 25.000000 Msps (10.000000 second run)
Error code: 1
Unexpected error on recv, exit test...
Warning:
The hardware does not support the requested RX sample rate:
Target sample rate: 50.000000 MSps
Actual sample rate: 25.000000 MSps
Done!
On Tue, Mar 1, 2011 at 1:07 PM, Josh Blum <j...@ettus.com> wrote:
>
>
> On 03/01/2011 12:50 PM, Phelps Williams wrote:
> > Hmm, when running git branch --track gr_uhd_next jblum/gr_uhd_next
> >
> > I get the error fatal: Not a valid object name: 'jblum/gr_uhd_next'.
> >
> > Has something changed within the past few days?
> >
>
> It has been merged into gnuradio.git/next branch.
>
> Thanks,
> -josh
>
> > -Phelps
> >
> > On Thu, Feb 24, 2011 at 10:15 PM, Josh Blum <j...@ettus.com> wrote:
> >
> >>
> >>
> >> On 02/24/2011 09:43 PM, Phelps Williams wrote:
> >>> I'm using grc to generate some extremely simple flowgraphs but I'm
> seeing
> >>> very odd performance. Any idea why I can't seem to get this
> combination
> >> to
> >>> work? I have had success with a GRC + USRP2 + WBX + UHD, anybody know
> >> why
> >>> I'm having issues here?
> >>>
> >>
> >> Are you saying that if you run the same flow graph, host pc, ethernet
> >> port, and software install on the USRP2 + WBX, you do not see this
> problem?
> >>
> >> I am confused about the one hardware not working while the other does,
> >> because its functionally identical. Just wondering if we can isolate
> >> this problem to a particular machine, software install, etc... instead.
> >>
> >>> UHD source block got error code 0x1
> >>> gr_block_executor: source <gr_block uhd single_usrp source (2)>
> produced
> >> no
> >>> output. We're marking it DONE.
> >>>
> >>
> >> This is the call to recv() on the udp socket timing out. Either data
> >> isnt coming over the ethernet cable for some reason recv()/select()
> >> error-ed.
> >>
> >> In any case, do you mind trying the next branch?
> >>
> >> In the uhd repo:
> >> git remote update
> >> git branch --track next origin/next
> >> git checkout next
> >> cd host/build && make install..
> >>
> >> and for gnuradio
> >> git remote add jblum git://gnuradio.org/jblum.git
> >> git remote update
> >> git branch --track gr_uhd_next jblum/gr_uhd_next
> >> git checkout gr_uhd_next
> >> make install...
> >>
> >> -josh
> >>
> >> _______________________________________________
> >> Discuss-gnuradio mailing list
> >> Discuss-gnuradio@gnu.org
> >> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> >>
> >
>
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