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Setting threading-model /Draw or Cull/Draw while using realtime shadows with shadow cameras will freeze panda3d #162

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ghost opened this issue Aug 22, 2017 · 3 comments
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Setting threading-model /Draw or Cull/Draw while using realtime shadows with shadow cameras will freeze panda3d #162

ghost opened this issue Aug 22, 2017 · 3 comments
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@ghost
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ghost commented Aug 22, 2017 •
edited by ghost

Setting threading-model /Draw or Cull/Draw will freeze panda3d for me after a few seconds.
Edit: as pointed out below, I do indeed use light.setShadowCaster() which seems to be related to this.

This is how it looks like in gdb:

(gdb) thread apply all bt

Thread 4 (Thread 0x7fa849ef0700 (LWP 19159)):
#0  0x00007fa871a0181b in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fa850fbb158 in pa_threaded_mainloop_wait () from /lib64/libpulse.so.0
#2  0x00007fa8514257ef in ALCpulsePlayback_mixerProc () from /lib64/libopenal.so.1
#3  0x00007fa8514294e7 in althrd_starter () from /lib64/libopenal.so.1
#4  0x00007fa8719fb36d in start_thread () from /lib64/libpthread.so.0
#5  0x00007fa871016b8f in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7fa84e6f1700 (LWP 19158)):
#0  0x00007fa87100aa9d in poll () from /lib64/libc.so.6
#1  0x00007fa850fbab71 in poll_func () from /lib64/libpulse.so.0
#2  0x00007fa850fac530 in pa_mainloop_poll () from /lib64/libpulse.so.0
#3  0x00007fa850facbc0 in pa_mainloop_iterate () from /lib64/libpulse.so.0
#4  0x00007fa850facc50 in pa_mainloop_run () from /lib64/libpulse.so.0
#5  0x00007fa850fbaab9 in thread () from /lib64/libpulse.so.0
#6  0x00007fa850d5a078 in internal_thread_func () from /usr/lib64/pulseaudio/libpulsecommon-10.0.so
#7  0x00007fa8719fb36d in start_thread () from /lib64/libpthread.so.0
#8  0x00007fa871016b8f in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7fa85a39d700 (LWP 19154)):
#0  0x00007fa871a04fad in __lll_lock_wait () from /lib64/libpthread.so.0
#1  0x00007fa8719fde88 in pthread_mutex_lock () from /lib64/libpthread.so.0
#2  0x00007fa865ef17a9 in ReMutexPosixImpl::acquire() () from /usr/lib64/panda3d/libpanda.so.1.10
#3  0x00007fa8660837f9 in GraphicsEngine::get_threading_model() const () from /usr/lib64/panda3d/libpanda.so.1.10
#4  0x00007fa86608ef8a in GraphicsEngine::make_output(GraphicsPipe*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int, FrameBufferProperties const&, WindowProperties const&, int, GraphicsStateGuardian*, GraphicsOutput*) ()
   from /usr/lib64/panda3d/libpanda.so.1.10
#5  0x00007fa8660ae662 in GraphicsStateGuardian::make_shadow_buffer(NodePath const&, GraphicsOutputBase*) ()
   from /usr/lib64/panda3d/libpanda.so.1.10
#6  0x00007fa8660af19a in GraphicsStateGuardian::get_shadow_map(NodePath const&, GraphicsOutputBase*) () from /usr/lib64/panda3d/libpanda.so.1.10
#7  0x00007fa8660b4301 in GraphicsStateGuardian::fetch_specified_texture(Shader::ShaderTexSpec&, SamplerState&, int&) ()
   from /usr/lib64/panda3d/libpanda.so.1.10
#8  0x00007fa85bf1d9ae in GLShaderContext::update_shader_texture_bindings(ShaderContext*) () from /usr/lib64/panda3d/libpandagl.so
#9  0x00007fa85bf20d18 in GLGraphicsStateGuardian::do_issue_texture() () from /usr/lib64/panda3d/libpandagl.so
#10 0x00007fa85bf2ada5 in GLGraphicsStateGuardian::set_state_and_transform(RenderState const*, TransformState const*) ()
   from /usr/lib64/panda3d/libpandagl.so
#11 0x00007fa865f83787 in CullBinFixed::draw(bool, Thread*) () from /usr/lib64/panda3d/libpanda.so.1.10
#12 0x00007fa865eda9a3 in CullResult::draw(Thread*) () from /usr/lib64/panda3d/libpanda.so.1.10
#13 0x00007fa86609167d in GraphicsEngine::do_draw(GraphicsOutput*, GraphicsStateGuardian*, DisplayRegion*, Thread*) ()
   from /usr/lib64/panda3d/libpanda.so.1.10
#14 0x00007fa866091977 in GraphicsEngine::draw_bins(ov_set<PointerTo<GraphicsOutput>, IndirectLess<GraphicsOutput>, pvector<PointerTo<GraphicsOutput> > > const&, Thread*) () from /usr/lib64/panda3d/libpanda.so.1.10
#15 0x00007fa866093846 in GraphicsEngine::WindowRenderer::do_frame(GraphicsEngine*, Thread*) () from /usr/lib64/panda3d/libpanda.so.1.10
#16 0x00007fa86609541b in GraphicsEngine::RenderThread::thread_main() () from /usr/lib64/panda3d/libpanda.so.1.10
#17 0x00007fa8660c5ff0 in ThreadPosixImpl::root_func(void*) () from /usr/lib64/panda3d/libpanda.so.1.10
#18 0x00007fa8719fb36d in start_thread () from /lib64/libpthread.so.0
---Type <return> to continue, or q <return> to quit---
#19 0x00007fa871016b8f in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7fa87236a700 (LWP 19144)):
#0  0x00007fa871a04fad in __lll_lock_wait () from /lib64/libpthread.so.0
#1  0x00007fa8719fde13 in pthread_mutex_lock () from /lib64/libpthread.so.0
#2  0x00007fa865ec12c9 in MutexPosixImpl::acquire() () from /usr/lib64/panda3d/libpanda.so.1.10
#3  0x00007fa8660940d1 in GraphicsEngine::render_frame() () from /usr/lib64/panda3d/libpanda.so.1.10
#4  0x00007fa866d7210c in Dtool_GraphicsEngine_render_frame_515(_object*, _object*) ()
   from /usr/lib64/python3.6/site-packages/panda3d/core.cpython-36m-x86_64-linux-gnu.so
#5  0x00007fa871d9713a in _PyCFunction_FastCallDict () from /lib64/libpython3.6m.so.1.0
#6  0x00007fa871d9e4ba in call_function () from /lib64/libpython3.6m.so.1.0
#7  0x00007fa871ddb61a in _PyEval_EvalFrameDefault () from /lib64/libpython3.6m.so.1.0
#8  0x00007fa871d2d12a in _PyFunction_FastCallDict () from /lib64/libpython3.6m.so.1.0
#9  0x00007fa871d2d81e in _PyObject_FastCallDict () from /lib64/libpython3.6m.so.1.0
#10 0x00007fa871d37451 in _PyObject_Call_Prepend () from /lib64/libpython3.6m.so.1.0
#11 0x00007fa871d2dc3b in PyObject_Call () from /lib64/libpython3.6m.so.1.0
#12 0x00007fa86707775d in PythonThread::call_python_func(_object*, _object*) ()
   from /usr/lib64/python3.6/site-packages/panda3d/core.cpython-36m-x86_64-linux-gnu.so
#13 0x00007fa86707ac4e in PythonTask::do_python_task() () from /usr/lib64/python3.6/site-packages/panda3d/core.cpython-36m-x86_64-linux-gnu.so
#14 0x00007fa86707b398 in PythonTask::do_task() () from /usr/lib64/python3.6/site-packages/panda3d/core.cpython-36m-x86_64-linux-gnu.so
#15 0x00007fa8660cdc3d in AsyncTask::unlock_and_do_task() () from /usr/lib64/panda3d/libpanda.so.1.10
#16 0x00007fa8660d5a2a in AsyncTaskChain::service_one_task(AsyncTaskChain::AsyncTaskChainThread*) () from /usr/lib64/panda3d/libpanda.so.1.10
#17 0x00007fa8660d70c1 in AsyncTaskChain::do_poll() () from /usr/lib64/panda3d/libpanda.so.1.10
#18 0x00007fa8660d7861 in AsyncTaskManager::poll() () from /usr/lib64/panda3d/libpanda.so.1.10
#19 0x00007fa866da8143 in Dtool_AsyncTaskManager_poll_128(_object*, _object*) ()
   from /usr/lib64/python3.6/site-packages/panda3d/core.cpython-36m-x86_64-linux-gnu.so
#20 0x00007fa871d9713a in _PyCFunction_FastCallDict () from /lib64/libpython3.6m.so.1.0
#21 0x00007fa871d9e4ba in call_function () from /lib64/libpython3.6m.so.1.0
#22 0x00007fa871ddb61a in _PyEval_EvalFrameDefault () from /lib64/libpython3.6m.so.1.0
#23 0x00007fa871d60c5a in fast_function () from /lib64/libpython3.6m.so.1.0
#24 0x00007fa871d9e57e in call_function () from /lib64/libpython3.6m.so.1.0
#25 0x00007fa871ddb61a in _PyEval_EvalFrameDefault () from /lib64/libpython3.6m.so.1.0
#26 0x00007fa871d2c81d in _PyEval_EvalCodeWithName () from /lib64/libpython3.6m.so.1.0
#27 0x00007fa871d60e81 in fast_function () from /lib64/libpython3.6m.so.1.0
#28 0x00007fa871d9e57e in call_function () from /lib64/libpython3.6m.so.1.0
#29 0x00007fa871ddb61a in _PyEval_EvalFrameDefault () from /lib64/libpython3.6m.so.1.0
#30 0x00007fa871d60c5a in fast_function () from /lib64/libpython3.6m.so.1.0
#31 0x00007fa871d9e57e in call_function () from /lib64/libpython3.6m.so.1.0
#32 0x00007fa871ddb61a in _PyEval_EvalFrameDefault () from /lib64/libpython3.6m.so.1.0
#33 0x00007fa871dab427 in PyEval_EvalCodeEx () from /lib64/libpython3.6m.so.1.0
#34 0x00007fa871dac18b in PyEval_EvalCode () from /lib64/libpython3.6m.so.1.0
#35 0x00007fa871e33922 in run_mod () from /lib64/libpython3.6m.so.1.0
#36 0x00007fa871e3457d in PyRun_FileExFlags () from /lib64/libpython3.6m.so.1.0
#37 0x00007fa871e367a7 in PyRun_SimpleFileExFlags () from /lib64/libpython3.6m.so.1.0
#38 0x00007fa871e377a3 in Py_Main () from /lib64/libpython3.6m.so.1.0
#39 0x000055d7c3dd9cf5 in main ()
(gdb)
@rdb
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rdb commented Aug 22, 2017

There is currently a deadlock with multithreading and the shadow system. (Also tracked in LP: https://bugs.launchpad.net/panda3d/+bug/1212752 )

@rdb rdb added the bug label Aug 22, 2017
@ghost ghost changed the title Setting threading-model /Draw or Cull/Draw will freeze panda3d Setting threading-model /Draw or Cull/Draw while using realtime shadows with shadow cameras will freeze panda3d Aug 22, 2017
@drewc5131

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@rdb rdb closed this as completed in 5309db8 Dec 30, 2017
@rdb
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rdb commented Dec 30, 2017

Should be all right now. Please give it a try and report back whether it works for you.

rdb added a commit that referenced this issue Dec 30, 2017
@rdb
shadows: fix shadow buffer creation deadlock in multithreaded pipeline
7ee9467 
Fixes #162
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