Debugging using gdb pulseaudio when the pactl set-card-profile 0
a2dp_sink is launched and the cpu utilization of pulseaudio reach 99%
Breaking gdb this its the backtrace:
(gdb) c
Continuing.
^C
Program received signal SIGINT, Interrupt.
check_match (sym=sym@entry=0x77ef34c4, strtab=strtab@entry=0x77ef3c84
"", undef_name=undef_name@entry=0x7762b9ac "_ITM_registerTMCloneTable",
type_class=type_class@entry=1) at ldso/ldso/dl-hash.c:161
161 if ((sym->st_value == 0 && (ELF_ST_TYPE(sym->st_info) !=
STT_TLS))
(gdb) bt
#0 check_match (sym=sym@entry=0x77ef34c4,
strtab=strtab@entry=0x77ef3c84 "",
undef_name=undef_name@entry=0x7762b9ac "_ITM_registerTMCloneTable",
type_class=type_class@entry=1) at ldso/ldso/dl-hash.c:161
#1 0x77fe1b5c in _dl_lookup_sysv_hash (type_class=1,
undef_name=0x7762b9ac "_ITM_registerTMCloneTable", hash=192047269,
symtab=0x77ef1494,
tpnt=0x77ff52c0) at ldso/ldso/dl-hash.c:261
#2 _dl_find_hash (name=0x7762b9ac "_ITM_registerTMCloneTable",
scope=<optimized out>, mytpnt=0x456a90, type_class=1, sym_ref=0x0)
at ldso/ldso/dl-hash.c:339
#3 0x77fe1dc8 in _dl_perform_mips_global_got_relocations
(tpnt=0x456a90, lazy=0) at ldso/ldso/mips/elfinterp.c:390
#4 0x77cec848 in do_dlopen (libname=0x45e0c0
"/usr/lib/pulse-6.0/modules/module-null-sink.so", flag=2) at
ldso/libdl/libdl.c:557
#5 0x77cecb0c in dlopen (libname=0x45e0c0
"/usr/lib/pulse-6.0/modules/module-null-sink.so", flag=2) at
ldso/libdl/libdl.c:664
#6 0x0040a078 in bind_now_open (d=<optimized out>, fname=0x45e0c0
"/usr/lib/pulse-6.0/modules/module-null-sink.so", advise=<optimized out>)
at daemon/ltdl-bind-now.c:74
#7 0x77da26f0 in tryall_dlopen ()
from
/home/mimmo/projects/linino_CC/scripts/../staging_dir/target-mips_34kc_uClibc-0.9.33.2/root-ar71xx/usr/lib/libltdl.so.7
#8 0x77da3098 in find_handle_callback ()
from
/home/mimmo/projects/linino_CC/scripts/../staging_dir/target-mips_34kc_uClibc-0.9.33.2/root-ar71xx/usr/lib/libltdl.so.7
#9 0x77da2dd8 in foreach_dirinpath ()
from
/home/mimmo/projects/linino_CC/scripts/../staging_dir/target-mips_34kc_uClibc-0.9.33.2/root-ar71xx/usr/lib/libltdl.so.7
#10 0x77da2ef4 in find_handle ()
from
/home/mimmo/projects/linino_CC/scripts/../staging_dir/target-mips_34kc_uClibc-0.9.33.2/root-ar71xx/usr/lib/libltdl.so.7
#11 0x77da4c60 in try_dlopen ()
from
/home/mimmo/projects/linino_CC/scripts/../staging_dir/target-mips_34kc_uClibc-0.9.33.2/root-ar71xx/usr/lib/libltdl.so.7
#12 0x77da5028 in lt_dlopenadvise ()
from
/home/mimmo/projects/linino_CC/scripts/../staging_dir/target-mips_34kc_uClibc-0.9.33.2/root-ar71xx/usr/lib/libltdl.so.7
#13 0x77da51a0 in lt_dlopenext ()
from
/home/mimmo/projects/linino_CC/scripts/../staging_dir/target-mips_34kc_uClibc-0.9.33.2/root-ar71xx/usr/lib/libltdl.so.7
#14 0x77f6c15c in pa_module_load (c=0x423868, name=0x7763f89c
"module-null-sink",
argument=0x430758 "sink_name=auto_null
sink_properties='device.description=\"Dummy Output\"'") at
pulsecore/module.c:122
#15 0x7763f018 in load_null_sink_if_needed (c=0x423868, sink=<optimized
out>, u=0x454418) at modules/module-always-sink.c:81
#16 0x7763f21c in unlink_hook_callback (c=<optimized out>,
sink=<optimized out>, userdata=0x454418) at modules/module-always-sink.c:140
#17 0x77f69b74 in pa_hook_fire (hook=0x423a0c, data=0x474748) at
pulsecore/hook-list.c:104
#18 0x77f8bd00 in pa_sink_unlink (s=0x474748) at pulsecore/sink.c:686
#19 0x773ecb2c in stop_thread (u=0x471b48) at
modules/bluetooth/module-bluez5-device.c:1561
#20 0x773ef5e0 in set_profile_cb (c=<optimized out>,
new_profile=0x4730d8) at modules/bluetooth/module-bluez5-device.c:1863
#21 0x77f65678 in pa_card_set_profile (c=<optimized out>,
profile=0x4730d8, save=true) at pulsecore/card.c:279
#22 0x7771dc1c in command_set_card_profile (pd=<optimized out>,
command=<optimized out>, tag=2, t=<optimized out>, userdata=0x46c368)
at pulsecore/protocol-native.c:4782
#23 0x77e9fc50 in pa_pdispatch_run (pd=0x485850, packet=0x463f58,
ancil_data=0x478dd8, userdata=0x46c368) at pulsecore/pdispatch.c:341
#24 0x77726fd4 in pstream_packet_callback (p=0x478bf0, packet=0x463f58,
ancil_data=0x478dd8, userdata=<optimized out>)
at pulsecore/protocol-native.c:4896
#25 0x77ea3258 in do_read (p=0x478bf0, re=0x478d30) at
pulsecore/pstream.c:880
#26 0x77ea5b48 in do_pstream_read_write (p=0x478bf0) at
pulsecore/pstream.c:193
#27 0x77f14628 in dispatch_pollfds (m=0x421708) at pulse/mainloop.c:655
#28 pa_mainloop_dispatch (m=0x421708) at pulse/mainloop.c:898
---Type <return> to continue, or q <return> to quit---
#29 0x77f147e0 in pa_mainloop_iterate (m=0x421708, block=<optimized
out>, retval=0x7fff6be8) at pulse/mainloop.c:929
#30 0x77f14864 in pa_mainloop_run (m=0x421708, retval=0x7fff6be8) at
pulse/mainloop.c:944
#31 0x004056e8 in main (argc=<optimized out>, argv=<optimized out>) at
daemon/main.c:1134
(gdb)
Any suggestion on why this happen?
On 30/09/15 11:52, Mimmo wrote:
On 30/09/15 11:21, Tanu Kaskinen wrote:
On Wed, 2015-09-30 at 10:20 +0200, Mimmo wrote:
Arduino Tian (an evolution of Arduino Yun) is a board that has a MIPS
processor where Linux is runinng. The distribution used is Linino,
derived from openWRT.
On this board Wifi from Qualcomm and Bluetooth from CSR are embedded.
Software version details:
- kernel 3.18.11
- bluez5 version 5.23
- pulseaudio 6.0
- dbus 1.9
The Headset device is properly connected but using paplay:
root@linino:~# paplay -v -d bluez_sink.5D_43_5A_03_31_EA
/root/sample.wav
Opening a playback stream with sample specification 's16be 2ch 44100Hz'
and channel map 'front-left,front-right'.
Connection established.
Stream successfully created.
Buffer metrics: maxlength=4194304, tlength=352800, prebuf=349276,
minreq=3528
Using sample spec 's16be 2ch 44100Hz', channel map
'front-left,front-right'.
Connected to device bluez_sink.5D_43_5A_03_31_EA (index: 1,
suspended: no).
it start to play the music but without any sound. Trying to change the
card profile from HSP to A2DP with the command:
pactl set-card-profile 0, a2dp_sink
hangs the board and exit with connection failure: Timeout
Hangs the board? What does that mean? If pactl prints something after
the hang, apparently not the whole board gets hung (unless pactl runs
on a different machine).
It means that pactl exit after 10 secs but the pulseaudio process runs
at 90-99% of the cpu, and I need to restart the pulseaudio process to
continue to use the board.
trying to trace the code, I noticed that it stops on the call
stop_thread on module-bluez5-device.c
How did you trace the code? Can you check with gdb where it's stopping?
I used strace to understand what system call did, and then I put so
log messages. I'll try using gdb and let you know.
Can you help me to understand why is hanging changing the profile?
Is it possible to force the default to A2DP instead of HSP?
"pactl set-card-profile" should save the chosen profile so that later
on a2dp would get activated automatically. However, the code hangs
before the new profile preference gets written to the disk... You could
in theory hack the card-database file in ~/.config/pulse, but it's
binary data, so not exactly easy.
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