[Bug 107715] [CI][BAT] igt at gem_sync@basic-many-each - fail - Failed assertion: !"GPU hung"

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107715

--- Comment #2 from Chris Wilson <chris at chris-wilson.co.uk> ---
Something odd I spotted here:

<7>[  232.791376] missed_breadcrumb [head 149a8, postfix 149f8, tail 14a20,
batch 0x00000000_00002000]:
<7>[  232.791404] missed_breadcrumb [0000] 13244001 00000104 00000000 00000000
11000001 00022220 ffffffff 11000001
<7>[  232.791412] missed_breadcrumb [0020] 00022228 00470000 12400001 00022228
7fffc000 00000000 18800100 00002000
<7>[  232.791420] missed_breadcrumb [0040] 13204001 00000104 00000000 00000000
11000001 00002044 00000001 11000001
<7>[  232.791426] missed_breadcrumb [0060] 00012040 00000001 10800001 000000c0
00000001 01000000

There's only one MI_FLUSH_DW for the invalidate at the start of the request,
but in emit_mi_flush_dw(), there's the comment:

                /*
                 * Not only do we need a full barrier (post-sync write) after
                 * invalidating the TLBs, but we need to wait a little bit
                 * longer. Whether this is merely delaying us, or the
                 * subsequent flush is a key part of serialising with the
                 * post-sync op, this extra pass appears vital before a
                 * mm switch!
                 */

Hmm.

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are the assignee for the bug.
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20180828/50727ba7/attachment-0001.html>