Bug 95194

Summary: [BDWGT3e] piglit.spec.arb_shader_image_load_store.shader-mem-barrier fails
Product: Mesa Reporter: Mark Janes <mark.a.janes>
Component: Drivers/DRI/i965Assignee: Francisco Jerez <currojerez>
Status: RESOLVED FIXED QA Contact: Intel 3D Bugs Mailing List <intel-3d-bugs>
Severity: normal    
Priority: medium    
Version: git   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
i915 platform: i915 features:

Description Mark Janes 2016-04-28 18:56:06 UTC
This test passes on BDWGT2 but fails on BDWGT3e

PIGLIT: {"subtest": {"Fragment shader/'coherent' qualifier memory barrier test/modulus=64" : "pass"}}
Probe value at (88, 2, 0, 0)
  Expected: 33.000000
  Observed: 13697232.000000
PIGLIT: {"subtest": {"Vertex shader/'volatile' qualifier memory barrier test/modulus=64" : "fail"}}
Probe value at (220, 24, 0, 0)
  Expected: 33.000000
  Observed: 5111885.000000

Mesa's CI has not been executing piglit on all BDW sku's.  It is possible that it never worked on this platform.
Comment 1 Mark Janes 2016-04-28 19:23:02 UTC
This test fails on BDWGT3e at least as far back as 11.0.0.
Comment 2 Mark Janes 2016-05-27 23:54:27 UTC
Curro commented to me that he's not sure if this test is valid, because the spec is unclear as to what the behavior ought to be.  According to Curro, NV and other hardware fail this test.

Resolution is pending some khronos bug, perhaps Curro can link to it.
Comment 3 Mark Janes 2017-02-10 16:14:08 UTC
Resolved in piglit:

Author:     Francisco Jerez <currojerez@riseup.net>
arb_shader_image_load_store/shader-mem-barrier: Add explicit memoryBarrier to volatile subtest.

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