luaradio
luaradio copied to clipboard
vsergeev
luaradio crash into Ubuntu AARCH64 RPI4
Process show this error, inmediatly after start:
# luaradio -a rx_wbfm -i rtlsdr -o wavfile:test.wav 99.9e6
Found Rafael Micro R820T/2 tuner
Exact sample rate is: 1102500.002464 Hz
Allocating 15 zero-copy buffers
[DownsamplerBlock] Downstream block FrequencyDiscriminatorBlock terminated unexpectedly.
[LowpassFilterBlock] Downstream block DownsamplerBlock terminated unexpectedly.
[FrequencyTranslatorBlock] Downstream block LowpassFilterBlock terminated unexpectedly.
[RtlSdrSource] Downstream block FrequencyTranslatorBlock terminated unexpectedly.
# luaradio --platform
luajit LuaJIT 2.1.0-beta3
os Linux
arch arm64
page size 4096
cpu count 4
cpu model nil
features
fftw3f true fftw-3.3.8-neon
volk true 2.2 (neon_orc)
liquid true 1.3.2
# luaradio --version
LuaRadio 0.10.0 - Vanya A. Sergeev. https://luaradio.io
Running inside docker containter of ubuntu focal aarch64, inside RPI4
# uname -a
Linux 1ec78ce26902 5.10.83-v8 #1 SMP PREEMPT Tue Dec 7 13:42:57 UTC 2021 aarch64 aarch64 aarch64 GNU/Linux
Core dump are created core.602.gz
some advice?
I compiled without de optimizations and is working:
# luaradio --platform
Warning: neither libliquid nor libvolk found. LuaRadio will run without acceleration.
luajit LuaJIT 2.1.0-beta3
os Linux
arch arm64
page size 4096
cpu count 4
cpu model nil
features
fftw3f false
volk false
liquid false
I'll try to identify what are the lib that is failing
OK, after doing many test I found the issue was VOLK, now without install them, is working well
# luaradio --platform
luajit LuaJIT 2.1.0-beta3
os Linux
arch arm64
page size 4096
cpu count 4
cpu model nil
features
fftw3f true fftw-3.3.8-neon
volk false
liquid true 1.3.2
@vsergeev I compiled VOLK from sources latest 2.5.1, but same issue... do you think something need to be updated from luaradio? to work with VOLK into rpi4 aarch64?
# luaradio --platform
luajit LuaJIT 2.1.0-beta3
os Linux
arch arm64
page size 4096
cpu count 4
cpu model nil
features
fftw3f true fftw-3.3.8-neon
volk true 2.5.1 (neonv8)
liquid true 1.3.2
thanks!
Reading GDB core dump say:
[New LWP 5293]
Core was generated by `luajit /usr/local/bin/luaradio -a rx_wbfm -i rtlsdr -o wavfile:test.wav 99.9e6'.
Program terminated with signal SIGILL, Illegal instruction.
#0 0x000000555fad6624 in ?? ()
(gdb) bt
#0 0x000000555fad6624 in ?? ()
#1 0x0000007fbd42e3d8 in ?? ()
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) info locals
No symbol table info available.
(gdb) info registers
x0 0x7fbd42e378 548636124024
x1 0x18 24
x2 0x1 1
x3 0x7fbd67e504 548638549252
x4 0x3e08ea58 1040771672
x5 0x3f800000 1065353216
x6 0x7fbc336c88 548618333320
x7 0x7fbc336c80 548618333312
x8 0x390 912
x9 0x7fbd137000 548633014272
x10 0xfffd807fbd430c18 -703138805642216
x11 0x7fbd042720 548632012576
x12 0x144 324
x13 0x7fbc48be40 548619730496
x14 0xfffffffffffffff3 -13
x15 0x7fbc4b2960 548619888992
x16 0x7fbd138110 548633018640
x17 0x7fbd60a7a8 548638074792
x18 0x7fbd42e6fe 548636124926
x19 0x7fbc484c20 548619701280
x20 0xfffd807fbd043e00 -703138809758208
x21 0x7fbd44be18 548636245528
x22 0x7fbd42e3d8 548636124120
x23 0x391 913
x24 0x7fbc336c88 548618333320
x25 0x7fbd049fa8 548632043432
x26 0x7fbc43a690 548619396752
x27 0x7fbcf17ab0 548630788784
x28 0x7fbc4b28d8 548619888856
x29 0x7fe99abaa0 549380078240
x30 0x1 1
sp 0x7fe99aba80 0x7fe99aba80
pc 0x555fad6624 0x555fad6624
cpsr 0x60000000 [ EL=0 C Z ]
fpsr 0x11 17
fpcr 0x0 0
Hello, same problem here. Raspberry Pi 3, 64 bit.
luaradio --platform
luajit LuaJIT 2.1.0-beta3
os Linux
arch arm64
page size 4096
cpu count 4
cpu model nil
features
fftw3f true fftw-3.3.8-neon
volk true 2.4 (neon_orc)
liquid true 1.3.2
pi@raspberrypi:~/luaradio $ luaradio examples/rtlsdr_wbfm_mono.lua 91.1e6
Found Rafael Micro R820T/2 tuner
Exact sample rate is: 1102500.002464 Hz
Allocating 15 zero-copy buffers
[DownsamplerBlock] Downstream block FrequencyDiscriminatorBlock terminated unexpectedly.
[LowpassFilterBlock] Downstream block DownsamplerBlock terminated unexpectedly.
[FrequencyTranslatorBlock] Downstream block LowpassFilterBlock terminated unexpectedly.
[RtlSdrSource] Downstream block FrequencyTranslatorBlock terminated unexpectedly.
@Maissacrement what version works for you? You say that the issue is from librtlsdr?
Hi @vsergeev are you be able to check this issue? I think is really important for all of use that run inside low profile CPUs like RPI. Thanks!
I got the same issue into Apple M1 Pro, that looks that the problem is the same into all ARM 64 bits arch.
% luaradio --platform
luajit LuaJIT 2.1.0-beta3
os OSX
arch arm64
page size 16384
cpu count 8
cpu model MacBookPro18,3
features
volk true 2.5.0 (neon_orc)
liquid true 1.4.0
fftw3f true fftw-3.3.10-neon
@vsergeev some way to take a look on this? thanks in advance!
look like VOLK on NEON cpu was broken, almost into the latest release of VOLK https://github.com/gnuradio/volk/releases/tag/v2.5.2
Say:
- Fixes
- Fix broken neon kernels
I was able to reproduce the crash under Arch Linux ARM aarch64 and VOLK 2.5.0. Unfortunately, it still crashes under VOLK 2.5.2 too.
[alarm@alarm luaradio]$ ./luaradio --platform
luajit LuaJIT 2.1.0-beta3
os Linux
arch arm64
page size 4096
cpu count 4
cpu model nil
features
volk true 2.5.0 (neon_orc)
fftw3f true fftw-3.3.10
liquid true 1.4.0
[alarm@alarm luaradio]$ ./luaradio -a rx_wbfm -i rtlsdr -o wavfile:test.wav 99.9e6
Found Rafael Micro R820T/2 tuner
Exact sample rate is: 1102500.002464 Hz
Allocating 15 zero-copy buffers
[DownsamplerBlock] Downstream block FrequencyDiscriminatorBlock terminated unexpectedly.
[LowpassFilterBlock] Downstream block DownsamplerBlock terminated unexpectedly.
[FrequencyTranslatorBlock] Downstream block LowpassFilterBlock terminated unexpectedly.
[RtlSdrSource] Downstream block FrequencyTranslatorBlock terminated unexpectedly.
...
[alarm@alarm luaradio]$
It does appear to just be a problem with using VOLK, as running with it disabled it works fine:
[alarm@alarm luaradio]$ LUARADIO_DISABLE_VOLK=1 ./luaradio -a rx_wbfm -i rtlsdr -o wavfile:test.wav 99.9e6
Found Rafael Micro R820T/2 tuner
Exact sample rate is: 1102500.002464 Hz
Allocating 15 zero-copy buffers
^C[alarm@alarm luaradio]$
I'll have to dive in a bit more to see if it's an issue interfacing with VOLK or inside VOLK itself.
I've narrowed the issue down to the call to volk_32fc_s32f_atan2_32f_a() in the FrequencyDiscriminatorBlock (line 58). I'm going to try to reproduce it outside of LuaRadio to further isolate the issue.
I wasn't able to reproduce the crash in a standalone C program using VOLK. I'm starting to suspect the issue is either a LuaJIT optimization or perhaps a lurking memory management bug in LuaRadio (this seems less likely as it works on armv7l with a similar setup).
When turning on level 3 optimization flags one by one, the last one fuse ("Fusion of operands into instructions") seems to trigger the crash:
[alarm@alarm luaradio]$ luajit -O2 -O+fwd -O+dse -O+abc -O+sink luaradio test.lua
...
[alarm@alarm luaradio]$ luajit -O2 -O+fwd -O+dse -O+abc -O+sink -O+fuse luaradio test.lua
...
[ZeroSource] Downstream block FrequencyDiscriminatorBlock terminated unexpectedly.
[alarm@alarm luaradio]$
[alarm@alarm luaradio]$ luajit -O-fuse luaradio test.lua
...
-O-fuse
seems like, it is a x86 optimization, from what I read on the lua mailing list:
x86-specific improvements: Special heuristics for move vs.
rename produce close to optimal code for two-operand machine
code instructions.
Fusion of memory operands into instructions is required to
generate high-quality x86 code. Late fusion in the backend
allows better, local decisions, based on actual register
pressure, rather than estimates of prior stages.
