[Mesa-dev] Hang in dri3_wait_for_event

[Gustaw Smolarczyk]

Hi,

I have found additional information regarding this bug.

It happens very often (~75%) when I move the chrome window between
monitors. It's a simple multi-monitor setup, both of the adapters are
connected to a single radeonsi GPU.

I hope that helps somewhat.

Regards,
Gustaw

2016-01-08 18:44 GMT+01:00 Gustaw Smolarczyk <wielkiegie at gmail.com>:
> Hi.
>
> 2016-01-08 18:11 GMT+01:00 Martin Peres <martin.peres at linux.intel.com>:
>> On 08/01/16 18:37, Gustaw Smolarczyk wrote:
>>>
>>> Hello,
>>>
>>> There are already quite a few bug reports[1][2][3] related to thread
>>> hang when DRI3 is enabled. The problem still exists, at least for me.
>>> Should I create another bug report about it? Or maybe the cause of
>>> this hang is outside mesa?
>>
>>
>> I do not think you should, there are enough bug reports already for what can
>> likely be attributed to the same issue.
>>
>>>
>>> I use xserver 1.18, xf86-video-ati git, libdrm git, mesa git
>>> (radeonsi), kernel 4.3.3. An example stack trace (from chrome gpu
>>> process):
>>
>>
>> What version of libxcb are you using.
>
> I am using libxcb 1.11.1. If I understand correctly, the latter of the
> patches attached in #84252 is included in this version.
>
>> The patch for this particular bug
>> should be sufficient. There is still another bug that I need to hunt down
>> [1] which for some reason only manifests itself at home but not at work.
>
> Just now, chrome hanged once again. It happened after I've been away
> from the computer for an hour. I am not sure if that is related or not
> though.
>
> Gustaw
>
>> Maybe I can try to fix that over the week end, since it is so cold outside
>> :p
>>
>> [1] https://bugs.freedesktop.org/show_bug.cgi?id=84252#c30
>>
>>
>>>
>>> (gdb) bt
>>> #0  0x00007f3c19b3664d in poll () at ../sysdeps/unix/syscall-template.S:84
>>> #1  0x00007f3c18b1ba22 in ?? () from /usr/lib64/libxcb.so.1
>>> #2  0x00007f3c18b1d669 in xcb_wait_for_special_event () from
>>> /usr/lib64/libxcb.so.1
>>> #3  0x00007f3c186b0adb in dri3_wait_for_event
>>> (draw=draw at entry=0x37742d8e64b8) at
>>>
>>> /var/tmp/portage/media-libs/mesa-9999/work/mesa-9999/src/loader/loader_dri3_helper.c:280
>>> #4  0x00007f3c186b0e48 in loader_dri3_wait_for_msc
>>> (draw=0x37742d8e64b8, target_msc=target_msc at entry=0,
>>> divisor=divisor at entry=0, remainder=remainder at entry=0,
>>> ust=0x7fff850f66b8, msc=0x7fff850f66b0, sbc=0x7fff850f66a8)
>>>     at
>>> /var/tmp/portage/media-libs/mesa-9999/work/mesa-9999/src/loader/loader_dri3_helper.c:314
>>> #5  0x00007f3c186abfbb in dri3_wait_for_msc (sbc=<optimized out>,
>>> msc=<optimized out>, ust=<optimized out>, remainder=0, divisor=0,
>>> target_msc=0, pdraw=<optimized out>)
>>>     at
>>> /var/tmp/portage/media-libs/mesa-9999/work/mesa-9999/src/glx/dri3_glx.c:389
>>> #6  dri3_drawable_get_msc (psc=<optimized out>, pdraw=<optimized out>,
>>> ust=<optimized out>, msc=<optimized out>, sbc=<optimized out>) at
>>>
>>> /var/tmp/portage/media-libs/mesa-9999/work/mesa-9999/src/glx/dri3_glx.c:404
>>> #7  0x00005654e934ef2a in ?? ()
>>> #8  0x0000000000000000 in ?? ()
>>>
>>> Regards,
>>> Gustaw Smolarczyk
>>>
>>> [1] https://bugs.freedesktop.org/show_bug.cgi?id=84252
>>> [2] https://bugs.freedesktop.org/show_bug.cgi?id=81623
>>> [3] https://bugs.freedesktop.org/show_bug.cgi?id=90202
>>> _______________________________________________
>>> mesa-dev mailing list
>>> mesa-dev at lists.freedesktop.org
>>> http://lists.freedesktop.org/mailman/listinfo/mesa-dev
>>>
>>