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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED DUPLICATE - GPU hang occurs when encoding.the platform is haswelll"
href="https://bugs.freedesktop.org/show_bug.cgi?id=104747#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED DUPLICATE - GPU hang occurs when encoding.the platform is haswelll"
href="https://bugs.freedesktop.org/show_bug.cgi?id=104747">bug 104747</a>
from <span class="vcard"><a class="email" href="mailto:zhoubo10@hikvision.com" title="zhoubo <zhoubo10@hikvision.com>"> <span class="fn">zhoubo</span></a>
</span></b>
<pre>(In reply to Elizabeth from <a href="show_bug.cgi?id=104747#c1">comment #1</a>)
<span class="quote">> Hello Zhoubo. If reproducible, could you try a more recent kernel
> <a href="https://www.kernel.org">https://www.kernel.org</a>? Thanks.</span >
I find the reason cause gpu hang may be encode rate control mode.
First I choose VBR mode, gpu hang occurs in most 10 mins.
Then I choose CBR mode, gpu hang doesn't occur again.
I find some difference in i965 driver, but I don't confirm which one is the
bug.
START: 0x00312000
HEAD: 0x02006e30
TAIL: 0x00008848
CTL: 0x0001f001
HWS: 0x00311000
ACTHD: 0x00000000 6a934b44
IPEIR: 0x00000000
IPEHR: 0x71000007
INSTDONE: 0xffdcffff
BBADDR: 0x00000000 6a934b45
BB_STATE: 0x00000120
INSTPS: 0x80000208
INSTPM: 0x00006080
FADDR: 0x00000000 6a934d00
according to the gpu hang info, I found "IPEHR: 0x71000007" means the gpu was
hang at this address. And I found the param might be error in function
"gen75_mfc_batchbuffer_emit_object_command" or
"gen75_vme_fill_vme_batchbuffer" because of "*command_ptr++ = (CMD_MEDIA_OBJECT
| (9 - 2))".
So I think the reason may be some param different in CRB and VBR, and it lead
to different in cmd "CMD_MEDIA_OBJECT", finally gpu hang occured.
Is this right?
If it's right ,could you help me find which is the bug ?</pre>
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