Comment # 3
on bug 73418
from christophe.choquet2@free.fr
- If I run the OpenCL hello_world without starting the X server, it is running fine. No hangs even if I run it multiple times. X starts properly after. - If I run hello_world within an X session, it hangs ever two tries. - If I start X server and run it in console, black screen/hang when returning to the X session With ddd, I have tracked the issue down to the point it hangs: (gdb) bt #0 radeon_drm_ws_queue_cs (ws=0x60b2e0, cs=0x7ffff7f6a010) at radeon_drm_winsys.c:555 #1 0x00007ffff293a7e8 in radeon_drm_cs_flush (rcs=0x7ffff7f6a010, flags=2, cs_trace_id=0) at radeon_drm_cs.c:567 #2 0x00007ffff2950f6d in r600_context_flush (ctx=0x6251d0, flags=2) at r600_hw_context.c:356 #3 0x00007ffff2951f3b in r600_flush (ctx=0x6251d0, flags=0) at r600_pipe.c:88 #4 0x00007ffff2952056 in r600_flush_gfx_ring (ctx=0x6251d0, flags=0) at r600_pipe.c:120 #5 0x00007ffff2952034 in r600_flush_from_st (ctx=0x6251d0, fence=0x7fffffffb390, flags=0) at r600_pipe.c:115 #6 0x00007ffff6c0718a in clover::command_queue::flush (this=0x642000) at core/queue.cpp:48 #7 0x00007ffff6c182f2 in clover::hard_event::wait (this=0xaca350) at core/event.cpp:124 #8 0x00007ffff6c60811 in clFinish (d_q=0x642008) at api/event.cpp:268 #9 0x000000000040136c in main (argc=1, argv=0x7fffffffdd58) at hello_world.c:193 If I run line 563 pipe_semaphore_signal(&ws->cs_queued) the system hang. The calling parameters are in a mesa dev list post.
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