[Bug 96743] [BYT, HSW, SKL, BXT, KBL] GPU hangs with GfxBench 4.0 CarChase

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96743

--- Comment #49 from Topi Pohjolainen <topi.pohjolainen at intel.com> ---
(In reply to Topi Pohjolainen from comment #48)
> While I attempted to catch the invalid instruction earlier under debugger I
> co-incidentally managed to get:
> 
> #17 0x00007ffff650a415 in do_flush_locked (out_fence_fd=<optimized out>, 
>     in_fence_fd=<optimized out>, brw=<optimized out>)
>     at intel_batchbuffer.c:702
> #18 _intel_batchbuffer_flush_fence (brw=<optimized out>, 
>     in_fence_fd=<optimized out>, out_fence_fd=<optimized out>, 
>     file=<optimized out>, line=<optimized out>) at intel_batchbuffer.c:789
> #19 0x00007ffff650a519 in intel_batchbuffer_require_space (
>     brw=brw at entry=0x7ffff60cb040, sz=32, ring=ring at entry=BLT_RING)
>     at intel_batchbuffer.c:237
> #20 0x00007ffff650b8d1 in intelEmitCopyBlit (brw=brw at entry=0x7ffff60cb040, 
>     cpp=cpp at entry=1, src_pitch=src_pitch at entry=384, 
>     src_buffer=src_buffer at entry=0x7ffff000f6a0,
> src_offset=src_offset at entry=0, 
>     src_tiling=src_tiling at entry=ISL_TILING_LINEAR, dst_pitch=384, 
>     dst_buffer=0x7fffdc5cdcd0, dst_offset=0, dst_tiling=ISL_TILING_LINEAR, 
>     src_x=0, src_y=0, dst_x=0, dst_y=0, w=384, h=1, logic_op=5379)
>     at intel_blit.c:527
> #21 0x00007ffff650d580 in intel_emit_linear_blit (
>     brw=brw at entry=0x7ffff60cb040, dst_bo=0x7fffdc5cdcd0, 
>     dst_offset=dst_offset at entry=0, src_bo=src_bo at entry=0x7ffff000f6a0, 
>     src_offset=src_offset at entry=0, size=size at entry=384) at intel_blit.c:729
> #22 0x00007ffff650e00f in brw_buffer_subdata (ctx=0x7ffff60cb040, offset=0, 
>     size=384, data=0x7fffdc5dc810, obj=0x7ffff21988d0)
>     at intel_buffer_objects.c:297
> #23 0x00007ffff6c9a9c7 in ?? ()
>    from
> /home/tpohjola/work/benchmarks/gfxbench_gl-4.0.0/plugins/libgfxbench40_gl.so
> 
> 
> In do_flush_locked() one called execbuffer() which via drmIoctl() resulted
> into errno 5 (I/O error).

There was also a gpu hang which might be something else than what I was
expecting see (invalid instruction). Unfortunately I didn't get a error dump
for this as I forgot to empty the error dump file.

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