Re: [Discuss-gnuradio] (de)modulation problems gnuradio 3.7.3...also GRC FFT missing axis labels

[Tom Rondeau]

On Wed, Mar 19, 2014 at 10:25 PM,  <address@hidden> wrote:
> Since the LastTests.log file was so large (150K) I extracted a few error
> blocks from the file.  I'm attempting to compile this on a PowerBook G4
> (PowerPC architecture) running Ubuntu 12.04.

Wow. Haven't had anyone report using a PowerPC with GNU Radio for a
while. But I'm not surprised that there are VOLK related issues; a
fairly untested platform for us these days.

This is failing using volk_malloc, which looks to see if your system
is POSIX compliant and if so, use posix_malloc; otherwise, use an
internally developed way of allocating aligned memory. In your case,
posix_memalign is being called and throwing that warning, which is
strange.

If you can apply this diff (a one-line change) and rebuild, it will
disable using posix_memalign. It'll be interesting to see if the
backup method will work for you.

Tom


diff --git a/volk/lib/volk_malloc.c b/volk/lib/volk_malloc.c
index b2b77dd..e913ffc 100644
--- a/volk/lib/volk_malloc.c
+++ b/volk/lib/volk_malloc.c
@@ -54,7 +54,8 @@

 // Otherwise, test if we are a POSIX or X/Open system
 // This only has a restriction that alignment be a power of 2.
-#if _POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600
+//#if _POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600
+#if 0

 void *volk_malloc(size_t size, size_t alignment)
 {





> RUN_VOLK_TESTS: volk_32fc_s32fc_multiply_32fc(20462,1)
> Volk warning: no arch found, returning generic impl
> unknown location(0): fatal error in "volk_32fc_s32fc_multiply_32fc_test":
> memory access violation at address: 0x105d6000: no mapping at fault address
> /home/fisher/gnuradio/volk/lib/testqa.cc(88): last checkpoint
>
> *** 1 failure detected in test suite "Master Test Suite"
> <end of output>
> Test time =   2.13 sec
> ----------------------------------------------------------
> Test Failed.
> "qa_volk_test_all" end time: Mar 19 20:52 EDT
> "qa_volk_test_all" time elapsed: 00:00:02
> ----------------------------------------------------------
>
> 53/178 Testing: qa_add_mult_div_sub
> 53/178 Test: qa_add_mult_div_sub
> Command: "/bin/sh"
> "/home/fisher/gnuradio/build/gr-blocks/python/blocks/qa_add_mult_div_sub_test.sh"
> Directory: /home/fisher/gnuradio/build/gr-blocks/python/blocks
> "qa_add_mult_div_sub" start time: Mar 19 20:55 EDT
> Output:
> ----------------------------------------------------------
> Segmentation fault (core dumped)
> <end of output>
> Test time =   3.47 sec
> ----------------------------------------------------------
> Test Failed.
> "qa_add_mult_div_sub" end time: Mar 19 20:55 EDT
> "qa_add_mult_div_sub" time elapsed: 00:00:03
>
> 53/178 Testing: qa_add_mult_div_sub
> 53/178 Test: qa_add_mult_div_sub
> Command: "/bin/sh"
> "/home/fisher/gnuradio/build/gr-blocks/python/blocks/qa_add_mult_div_sub_test.sh"
> Directory: /home/fisher/gnuradio/build/gr-blocks/python/blocks
> "qa_add_mult_div_sub" start time: Mar 19 20:55 EDT
> Output:
> ----------------------------------------------------------
> Segmentation fault (core dumped)
> <end of output>
> Test time =   3.47 sec
> ----------------------------------------------------------
> Test Failed.
> "qa_add_mult_div_sub" end time: Mar 19 20:55 EDT
> "qa_add_mult_div_sub" time elapsed: 00:00:03
> ----------------------------------------------------------
> 78/178 Testing: test_gr_filter
> 78/178 Test: test_gr_filter
> Command: "/bin/sh"
> "/home/fisher/gnuradio/build/gr-filter/lib/test_gr_filter_test.sh"
> Directory: /home/fisher/gnuradio/build/gr-filter/lib
> "test_gr_filter" start time: Mar 19 20:57 EDT
> Output:
> ----------------------------------------------------------
> VOLK: Error allocating memory (posix_memalign: 22)
> VOLK: Error allocating memory (posix_memalign: 22)
> VOLK: Error allocating memory (posix_memalign: 22)
> VOLK: Error allocating memory (posix_memalign: 22)
> VOLK: Error allocating memory (posix_memalign: 22)
> Segmentation fault (core dumped)
> ........
> <end of output>
> Test time =   1.08 sec
> ----------------------------------------------------------
> Test Failed.
> "test_gr_filter" end time: Mar 19 20:57 EDT
> "test_gr_filter" time elapsed: 00:00:01
> ----------------------------------------------------------
>
> 79/178 Testing: qa_interp_fir_filter
> 79/178 Test: qa_interp_fir_filter
> Command: "/bin/sh"
> "/home/fisher/gnuradio/build/gr-filter/python/filter/qa_interp_fir_filter_test.sh"
> Directory: /home/fisher/gnuradio/build/gr-filter/python/filter
> "qa_interp_fir_filter" start time: Mar 19 20:57 EDT
> Output:
> ----------------------------------------------------------
> VOLK: Error allocating memory (posix_memalign: 22)
> VOLK: Error allocating memory (posix_memalign: 22)
> VOLK: Error allocating memory (posix_memalign: 22)
> VOLK: Error allocating memory (posix_memalign: 22)
> VOLK: Error allocating memory (posix_memalign: 22)
> VOLK: Error allocating memory (posix_memalign: 22)
> VOLK: Error allocating memory (posix_memalign: 22)
> Segmentation fault (core dumped)
> <end of output>
> Test time =   3.62 sec
> ----------------------------------------------------------
> Test Failed.
> "qa_interp_fir_filter" end time: Mar 19 20:57 EDT
> "qa_interp_fir_filter" time elapsed: 00:00:03
> ----------------------------------------------------------
> 81/178 Testing: qa_freq_xlating_fir_filter
> 81/178 Test: qa_freq_xlating_fir_filter
> Command: "/bin/sh"
> "/home/fisher/gnuradio/build/gr-filter/python/filter/qa_freq_xlating_fir_filter_test.sh"
> Directory: /home/fisher/gnuradio/build/gr-filter/python/filter
> "qa_freq_xlating_fir_filter" start time: Mar 19 20:57 EDT
> Output:
> ----------------------------------------------------------
> VOLK: Error allocating memory (posix_memalign: 22)
> VOLK: Error allocating memory (posix_memalign: 22)
> VOLK: Error allocating memory (posix_memalign: 22)
> Segmentation fault (core dumped)
> <end of output>
> Test time =   4.98 sec
> ----------------------------------------------------------
> Test Failed.
> "qa_freq_xlating_fir_filter" end time: Mar 19 20:57 EDT
> "qa_freq_xlating_fir_filter" time elapsed: 00:00:04
> ----------------------------------------------------------
>
> 82/178 Testing: qa_fir_filter
> 82/178 Test: qa_fir_filter
> Command: "/bin/sh"
> "/home/fisher/gnuradio/build/gr-filter/python/filter/qa_fir_filter_test.sh"
> Directory: /home/fisher/gnuradio/build/gr-filter/python/filter
> "qa_fir_filter" start time: Mar 19 20:57 EDT
> Output:
> ----------------------------------------------------------
> VOLK: Error allocating memory (posix_memalign: 22)
> Segmentation fault (core dumped)
> <end of output>
> Test time =   5.68 sec
> ----------------------------------------------------------
> Test Failed.
> "qa_fir_filter" end time: Mar 19 20:57 EDT
> "qa_fir_filter" time elapsed: 00:00:05
> ----------------------------------------------------------
>  85/178 Testing: qa_fractional_resampler
> 85/178 Test: qa_fractional_resampler
> Command: "/bin/sh"
> "/home/fisher/gnuradio/build/gr-filter/python/filter/qa_fractional_resampler_test.sh"
> Directory: /home/fisher/gnuradio/build/gr-filter/python/filter
> "qa_fractional_resampler" start time: Mar 19 20:57 EDT
> Output:
> ----------------------------------------------------------
> VOLK: Error allocating memory (posix_memalign: 22)
> Segmentation fault (core dumped)
> <end of output>
> Test time =   3.76 sec
> ----------------------------------------------------------
> Test Failed.
> "qa_fractional_resampler" end time: Mar 19 20:57 EDT
> "qa_fractional_resampler" time elapsed: 00:00:03
> ----------------------------------------------------------
>
> ________________________________
> From: "Tom Rondeau" <address@hidden>
> To: address@hidden
> Cc: "GNURadio Discussion List" <address@hidden>
> Sent: Wednesday, March 19, 2014 12:02:50 PM
> Subject: Re: [Discuss-gnuradio] (de)modulation problems gnuradio
> 3.7.3...also GRC FFT missing axis labels
>
>
> On Mon, Mar 17, 2014 at 11:49 PM,  <address@hidden> wrote:
>> I successfully? installed gnuradio 3.7.3 from source on Ubuntu 12.04 using
>> the gnuradio-build script, but am running into problems demodulating
>> anything from a R820T based SDR.  GRC runs fine, but when I attempt to
>> execute any blocks that include an AM, NFM, or WBFM demodulator I get a
>> VOLK:Error allocating memory error.  I also noticed that if I just pipe
>> the
>> RTL-SDR source to a GUI FFT Sink (either QT or WX) there are no axis
>> labels
>> on the graphs....
>>
>> Attempting to receive WBFM using rtl_fm (per the examples on the rtl-sdr
>> OsmoSDR website) produce only static.  It's not a signal strength issue
>> per
>> se as another radio can pick up  the station, and the SDR hardware is
>> functional since I can receive WBFM with it normally via gqrx on a
>> different
>> machine.
>>
>> I'm wondering if there's a fundamental problem somewhere that's preventing
>> demod from happening.  Any troubleshooting suggestions would be
>> appreciated.
>> Regards,
>> R
>
> Yes, these all sound like very low-level issues with your installation
> or machine. You told us the OS you are using, but not the platform
> (e.g., processor).
>
> In the build directory of GNU Radio, you can run 'ctest' to see what
> passes and what fails there. That might help clue us in. Also, you
> should run volk_profile and make sure that completes without error
> (that will take some time to complete).
>
> Tom