[Bug 73866] New: [SNB/IVB/HSW Bisected]igt/gem_storedw_batches_loop/normal fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=73866

          Priority: high
            Bug ID: 73866
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: ben at bwidawsk.net
           Summary: [SNB/IVB/HSW
                    Bisected]igt/gem_storedw_batches_loop/normal fails
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: huax.lu at intel.com
          Hardware: All
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 92507
  --> https://bugs.freedesktop.org/attachment.cgi?id=92507&action=edit
dmesg

System Environment:
--------------------------
Platform: Sandybridge/Ivybridge/Haswell/
kernel: (drm-intel-nightly)53cda67197a01358c9c1455f70dd89852a1d7c7a

Bug detailed description:
---------------------------
It fails on Sandybridge/Ivybridge/Haswell/ with -queued, -fixes and -nightly
kernel.
igt/gem_storedw_batches_loop/secure-dispatch also fails by same commit.

Bisect shows: 1552aa21124cabe762862bb414490510415a2b2d is the first bad commit
commit 1552aa21124cabe762862bb414490510415a2b2d
Author: Ben Widawsky <benjamin.widawsky at intel.com>
Date:   Mon Jan 13 06:28:45 2014 -0800

    gem_storedw_batches_loop: Fix for BDW

    Existing code was trying to be too clever and wasn't properly emitting
    the high dword, or the correct length.

    Signed-off-by: Ben Widawsky <ben at bwidawsk.net>

output:
IGT-Version: 1.5-g03d144d (i686) (Linux:
3.13.0-rc8_drm-intel-nightly_53cda6_20140121+ i686)
running storedw loop with stall every 1 batch
Test assertion failure function store_dword_loop, file
gem_storedw_batches_loop.c:116:
Last errno: 2, No such file or directory
Failed assertion: buf[0] == (0x42000000 | val)
value mismatch: cur 0x00000000, stored 0x42000000
Subtest normal: FAIL


Reproduce steps:
-------------------------
1. ./gem_storedw_batches_loop --run-subtest normal

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