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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Stability issue in i915 during continuous 15h transcode workload with MFE"
href="https://bugs.freedesktop.org/show_bug.cgi?id=110285#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Stability issue in i915 during continuous 15h transcode workload with MFE"
href="https://bugs.freedesktop.org/show_bug.cgi?id=110285">bug 110285</a>
from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
<pre>Of particular note,
batch: [0x00000000_05489000, 0x00000000_05491000]
BBADDR: 0x00000000_029b5269
(GPU is reading far out of bounds)
And
HEAD: 0x040019e8 [0x00000ac8]
head = 0x000019e8, wraps = 32
TAIL: 0x000014b8 [0x00000b28, 0x00000b48]
ELSP[0]: pid 3041, ban score 0, seqno 26:0c994e24, prio 2, emitted
-184
ms, start ffd4b000, head 00001430, tail 000014b8
ELSP[1]: pid 3041, ban score 0, seqno 2e:0c994e25, prio 2, emitted
-160
ms, start ffc3b000, head 00001158, tail 000011d8
START: 0xffd4b000
says the CS overran the RING_TAIL.
But that doesn't explain
seqno: 0x0c994354
last_seqno: 0x0c994e25
as the older seqno is not in the ELSP0 ring (so would not have been rewritten
by the overrun). I suspect the pipecontrol writes stopped first.</pre>
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