Hi,
For my project, I have to use an Ettus e310 at high rates (> 10MSPs). With the
default settings, I’m not able to go further than 2MSPs, and was trying to use
RFNoC to avoid using the DUC (I’ve got UAL errors, so I thought using directly
the radio avoiding the upsampling, giving that I have a signal at 10MSPs or
more).
After cross-compiling, I’m able to see my device using uhd_usrp_probe, running
the given example, but using whatever scripts generated by gnuradio give me
this output :
[INFO] [UHDlinux; GNU C++ version 4.9.2; Boost_105700;
UHD_4.0.0.rfnoc-devel-369-g1908672f]
[INFO] [E300] Loading FPGA image:
/home/root/usr/usr/share/uhd/images/usrp_e310_fpga.bit...
[INFO] [E300] FPGA image loaded
[INFO] [E300] Detecting internal GPSDO
.... [INFO] [E300] GPSDO found
[INFO] [E300] Initializing core control (global registers)...
[INFO] [E300] Performing register loopback test...
[INFO] [E300] Register loopback test passed
[INFO] [RFNOC RADIO] Register loopback test passed
[INFO] [RFNOC RADIO] Register loopback test passed
[WARNING] [RFNOC] [0/fosphor_0] defines 2 input buffer sizes, but 1
input ports
[INFO] [AD936X] Performing CODEC loopback test...
[INFO] [AD936X] CODEC loopback test passed
[INFO] [AD936X] Performing CODEC loopback test...
[INFO] [AD936X] CODEC loopback test passed
[INFO] [CORES] Performing timer loopback test...
[INFO] [CORES] Timer loopback test passed
Segmentation fault
gdb give this information about the segfault :
Program received signal SIGSEGV, Segmentation fault.
memcmp_common_alignment (len=<optimized out>, srcp2=<optimized out>,
srcp1=7221248) at memcmp.c:165
165 a0 = ((op_t *) srcp1)[0];
The stack at the segfault is :
#0 memcmp_common_alignment (len=<optimized out>, srcp2=<optimized
out>,
srcp1=<optimized out>) at memcmp.c:177
#1 __GI_memcmp (s1=<optimized out>, s2=<optimized out>, len=<optimized
out>)
at memcmp.c:343
#2 0xb64b4618 in compare (__n=<optimized out>, __s2=<optimized out>,
__s1=<optimized out>)
at
/usr/src/debug/gcc-runtime/4.9.2-r0/gcc-4.9.2/build.arm-oe-linux-gnueabi.arm-oe-linux-gnueabi/arm-oe-linux-gnueabi/libstdc++-v3/include/bits/char_traits.h:259
#3 std::string::compare (this=this@entry=0x6620c8, __str=...)
at
/usr/src/debug/gcc-runtime/4.9.2-r0/gcc-4.9.2/build.arm-oe-linux-gnueabi.arm-oe-linux-gnueabi/arm-oe-linux-gnueabi/libstdc++-v3/include/bits/basic_string.h:2250
#4 0xb28cadcc in operator< <char, std::char_traits<char>,
std::allocator<char> > (__rhs=..., __lhs=...)
at
/home/balister/release-4/build/tmp-glibc/sysroots/ettus-e3xx-sg1/usr/include/c++/4.9.2/bits/basic_string.h:2590
#5 operator() (this=<optimized out>, __y=..., __x=...)
at
/home/balister/release-4/build/tmp-glibc/sysroots/ettus-e3xx-sg1/usr/include/c++/4.9.2/bits/stl_function.h:371
#6 _M_lower_bound (this=<optimized out>, __k=..., __y=<optimized out>,
__x=0x6620b8)
at
/home/balister/release-4/build/tmp-glibc/sysroots/ettus-e3xx-sg1/usr/incl---Type
<return> to continue, or q <return> to quit—
ude/c++/4.9.2/bits/stl_tree.h:1261
#7 lower_bound (__k=..., this=0xb2926658 <global_block_registry>)
at
/home/balister/release-4/build/tmp-glibc/sysroots/ettus-e3xx-sg1/usr/include/c++/4.9.2/bits/stl_tree.h:927
#8 lower_bound (__x=..., this=0xb2926658 <global_block_registry>)
at
/home/balister/release-4/build/tmp-glibc/sysroots/ettus-e3xx-sg1/usr/include/c++/4.9.2/bits/stl_map.h:902
#9 std::map<std::string, std::map<long, gr::basic_block*,
std::less<long>, std::allocator<std::pair<long const, gr::basic_block*> > >,
std::less<std::string>, std::allocator<std::pair<std::string const,
std::map<long, gr::basic_block*, std::less<long>, std::allocator<std::pair<long
const, gr::basic_block*> > > > > >::operator[] (this=this@entry=0xb2926658
<global_block_registry>, __k=...)
at
/home/balister/release-4/build/tmp-glibc/sysroots/ettus-e3xx-sg1/usr/include/c++/4.9.2/bits/stl_map.h:496
(The full stack is 46 lines)
Is the idea of using RFNoC to emit at higher rates a good idea ?
If yes, how can I resolve the SEGFAULT ? Where does it come ?
Regards,
Simon
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