[Bug 109732] DiRT Rally has extreme graphical corruption and performance loss

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109732

--- Comment #12 from leozinho29_eu at hotmail.com ---
Just rebuilt Mesa to test. The stages have much more crowd than before. The
minimum FPS on benchmarks was 61 and the average FPS was 84, both significantly
higher than before. About the maximum FPS, probably the CPU is being the
limiting factor as it is always around 111 FPS.

This is as good as i965 without workaround for the blinking bug and has no
blinking bug.

I got a new crash when letting the benchmark running on loop (around 20
minutes):

Thread 56 "OGL_Dispatch_33" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fb627fff700 (LWP 2155)]
0x00007fb6b460a479 in alloc_surface_states (mgr=0x4898e20, ref=0x4bde2e0,
aux_usages=<optimized out>) at ../src/gallium/drivers/iris/iris_resource.h:239
239     ../src/gallium/drivers/iris/iris_resource.h: Arquivo ou diretório
inexistente.
(gdb) bt
#0  0x00007fb6b460a479 in alloc_surface_states (mgr=0x4898e20, ref=0x4bde2e0,
aux_usages=<optimized out>) at ../src/gallium/drivers/iris/iris_resource.h:239
#1  0x00007fb6b460d011 in iris_set_shader_images (ctx=0x4bd7ee0,
p_stage=<optimized out>, start_slot=0, count=3, p_images=0x7fb627ffe370) at
../src/gallium/drivers/iris/iris_state.c:1954
#2  0x00007fb6b4266a92 in st_bind_images (st=0x4e21580, prog=0x7fb6918865d0,
shader_type=PIPE_SHADER_COMPUTE) at
../src/mesa/state_tracker/st_atom_image.c:177
#3  0x00007fb6b431d784 in st_validate_state (st=st at entry=0x4e21580,
pipeline=pipeline at entry=ST_PIPELINE_COMPUTE) at ../src/util/bitscan.h:104
#4  0x00007fb6b432301d in st_dispatch_compute_common (ctx=0x63a9940,
num_groups=0x7fb627ffe7cc, group_size=0x0, indirect=0x0, indirect_offset=0) at
../src/mesa/state_tracker/st_cb_compute.c:58
#5  0x00007fb6b4308c5f in dispatch_compute (no_error=false, num_groups_z=1,
num_groups_y=45, num_groups_x=80) at ../src/mesa/main/compute.c:265
#6  0x00007fb6b4308c5f in _mesa_DispatchCompute (num_groups_x=80,
num_groups_y=45, num_groups_z=1) at ../src/mesa/main/compute.c:280
#7  0x0000000001d0de30 in  ()
#8  0x00000000020f8e8e in  ()
#9  0x0000000002173bfe in  ()
#10 0x00007fb6ccb1e6db in start_thread (arg=0x7fb627fff700) at
pthread_create.c:463
#11 0x00007fb6c5f7288f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

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