[Xcb] [Bug 93414] New: hang in xcb_wait_for_reply / vl_dri2_get_flush_reply

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93414

            Bug ID: 93414
           Summary: hang in xcb_wait_for_reply / vl_dri2_get_flush_reply
           Product: XCB
           Version: 1.11
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Protocol
          Assignee: xcb at lists.freedesktop.org
          Reporter: vliaskov at gmail.com
        QA Contact: xcb at lists.freedesktop.org

Application that renders using libva/vdpau/opengl hangs after a few minutes of
operation (always reproducible within 1-15 minutes usually).

I see a hang in xcb_wait_for_reply() for request #31161:

Possibly relevant part of xtrace:
000:>:4d8a:32: Reply to SwapBuffers: swap_hi=0 swap_lo=31161
000:>:4d8b:32: Reply to GetInputFocus: revert-to=Parent(0x02) focus=0x02e000e0
000:<:24d8c: 20: DRI2-Request(155,7): GetBuffersWithFormat drawable=0x04400006
attachments={attachment=BackLeft(0x00000001) format=0x00000020};
000:>:24d8c: Event DRI2-BufferSwapComplete(102) drawable=0x00000002
ust_hi=71303174 ust_lo=0 msc_hi=1858207713 msc_lo=0 sbc_hi=109393 sbc_lo=31161

And:
000:<:31161:  4: Request(43): GetInputFocus  
000:>:31161: Event DRI2-InvalidateBuffers(103) drawable=0x04400006

Backtrace of thread waiting in xcb_wait_for_reply():

Thread 8 (Thread 0x7fca1f778700 (LWP 3580)):
#0  0x00007fca55a3e12d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fca5316b262 in poll (__timeout=-1, __nfds=1, __fds=0x7fca1f776a20)
at
    /usr/include/x86_64-linux-gnu/bits/poll2.h:46
#2  _xcb_conn_wait (c=c at entry=0x2885500, cond=cond at entry=0x7fca1f776b40,
        vector=vector at entry=0x0, count=count at entry=0x0) at xcb_conn.c:459
#3  0x00007fca5316cadf in wait_for_reply (c=c at entry=0x2885500, request=31161,
        e=e at entry=0x0) at xcb_in.c:491
#4  0x00007fca5316cbf2 in xcb_wait_for_reply (c=0x2885500, request=31161,
e=0x0)
at xcb_in.c:521
#5  0x00007fca419b8004 in vl_dri2_get_flush_reply (scrn=0x2653600) at
../../../../../src/gallium/auxiliary/vl/vl_winsys_dri.c:110
#6  0x00007fca419b8101 in vl_dri2_destroy_drawable (scrn=0x2653600) at
../../../../../src/gallium/auxiliary/vl/vl_winsys_dri.c:153
#7  0x00007fca419b8185 in vl_dri2_set_drawable (scrn=0x2653600,
        drawable=71303307) at
../../../../../src/gallium/auxiliary/vl/vl_winsys_dri.c:176
#8  0x00007fca419b82c8 in vl_dri2_screen_texture_from_drawable
(vscreen=0x2653600, drawable=0x440008b) at
../../../../../src/gallium/auxiliary/vl/vl_winsys_dri.c:193
#9  0x00007fca419b61ab in vlVdpPresentationQueueDisplay
(presentation_queue=<optimized out>, surface=5, clip_width=1280,
 clip_height=720, earliest_presentation_time=0)
        at
../../../../../../src/gallium/state_trackers/vdpau/presentation.c:234
#10 0x00007fca423ca6a3 in flip_surface_unlocked
        (driver_data=driver_data at entry=0x2650c90,
         obj_output=obj_output at entry=0x291a2b0) at vdpau_video_x11.c:583
#11 0x00007fca423cb2e1 in queue_surface_unlocked (obj_surface=<optimized out>,
        obj_output=0x291a2b0, driver_data=0x2650c90) at vdpau_video_x11.c:610
#12 put_surface_unlocked (flags=32, target_rect=0x7fca1f776f90,
        source_rect=0x7fca1f776f80, obj_output=0x291a2b0,
obj_surface=0x2919bf0,
        driver_data=0x2650c90) at vdpau_video_x11.c:689
#13 put_surface (driver_data=driver_data at entry=0x2650c90,
        surface=surface at entry=50331655, drawable=drawable at entry=71303307,
        drawable_width=<optimized out>, drawable_height=720,
            source_rect=source_rect at entry=0x7fca1f776f80,
            target_rect=target_rect at entry=0x7fca1f776f90, flags=flags at entry=32)
at vdpau_video_x11.c:755
#14 0x00007fca423cb59c in vdpau_PutSurface (ctx=<optimized out>,
        surface=50331655, draw=0x440008b, srcx=<optimized out>, srcy=<optimized
        out>, srcw=<optimized out>, srch=720, destx=0, desty=0,
            destw=1280, desth=720, cliprects=0x0, number_cliprects=0, flags=32)
at vdpau_video_x11.c:808
#15 0x000000000040eed2 in on_client_draw (glsink=<optimized out>,
buf=<optimized
        out>, data=0x626d40 <video>) at video.c:619


Full backtrace at: http://pastebin.com/rQCJm64C

Using:

libX11 1.6.2
libxcb 1.11 or 1.10
mesa 11.0 (11.0~git1508070730.42d283~gd~t from oibaf/graphics-drivers ppa)
xserver-xorg-video-radeon 1:7.5.99+git1508070731.3791fc~gd~t (same ppa)


I also made same bug  under dri/gallium/radeon_si
https://bugs.freedesktop.org/show_bug.cgi?id=93412 , apologies for this, I am
not sure where to file this problem. I will close one of the two bugs whenI am
pointed to the most appropriate component of the two.

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