[Bug 87131] New: [PNV]igt/gem_exec_lut_handle takes more than 10 minutes

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=87131

            Bug ID: 87131
           Summary: [PNV]igt/gem_exec_lut_handle takes more than 10
                    minutes
           Product: DRI
           Version: unspecified
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: huax.lu at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 110601
  --> https://bugs.freedesktop.org/attachment.cgi?id=110601&action=edit
dmesg

==System Environment==
--------------------------
Regression: not sure, it has bug 78023

Non-working platforms:PNV

==kernel==
--------------------------
drm-intel-nightly/bfdd01aa1825aa0068f9236b21362b550f6d630f
drm-intel-next-queued/bcfcc8ba29c933ee98c7f498ee7ccfa17be400dd
drm-intel-fixes/b0616c5306b342ceca07044dbc4f917d95c4f825

==Bug detailed description==
-----------------------------
It happens on PNV with drm-intel-nightly, drm-intel-next-queued and
drm-intel-fixes kernel. It has bug 78023, I am unable to find out a good commit
between latest commit and bug 78023 fixed commit.
output:
[root at x-pnv2 tests]# time ./gem_exec_lut_handle
IGT-Version: 1.8-g819e68f (i686) (Linux:
3.18.0_drm-intel-nightly_34d267_20141209+ i686)
relocation: buffers=   1: old=   8299 + 531.5*reloc, lut=   8555 + 514.9*reloc
(ns)
relocation: buffers=   2: old=   9516 + 533.0*reloc, lut=  10054 + 519.0*reloc
(ns)
relocation: buffers=   4: old=  10180 + 533.5*reloc, lut=  10201 + 516.7*reloc
(ns)
relocation: buffers=   8: old=  12547 + 534.7*reloc, lut=  12365 + 517.0*reloc
(ns)
relocation: buffers=  16: old=  17163 + 537.4*reloc, lut=  17001 + 520.6*reloc
(ns)
relocation: buffers=  32: old=  27241 + 540.0*reloc, lut=  26238 + 523.0*reloc
(ns)
relocation: buffers=  64: old=  55244 + 546.7*reloc, lut=  53265 + 526.8*reloc
(ns)
relocation: buffers= 128: old= 112780 + 561.8*reloc, lut= 107378 + 546.3*reloc
(ns)
relocation: buffers= 256: old= 229777 + 574.0*reloc, lut= 221390 + 549.4*reloc
(ns)
relocation: buffers= 512: old= 460770 + 601.9*reloc, lut= 446514 + 571.0*reloc
(ns)
relocation: buffers=1024: old=1440171 + 665.0*reloc, lut=1390482 + 623.0*reloc
(ns)
relocation: buffers=2048: old=4711207 + 751.2*reloc, lut=4627285 + 669.5*reloc
(ns)
skip-relocs: buffers=   1: old=   7186 + 121.8*reloc, lut=   7089 + 112.3*reloc
(ns)
skip-relocs: buffers=   2: old=   7886 + 121.8*reloc, lut=   7798 + 112.3*reloc
(ns)
skip-relocs: buffers=   4: old=   9128 + 121.8*reloc, lut=   9022 + 112.4*reloc
(ns)
skip-relocs: buffers=   8: old=  11445 + 121.9*reloc, lut=  11192 + 112.5*reloc
(ns)
skip-relocs: buffers=  16: old=  15966 + 122.1*reloc, lut=  15602 + 112.6*reloc
(ns)
skip-relocs: buffers=  32: old=  26033 + 123.7*reloc, lut=  25124 + 113.1*reloc
(ns)
skip-relocs: buffers=  64: old=  54052 + 130.7*reloc, lut=  51915 + 117.4*reloc
(ns)
skip-relocs: buffers= 128: old= 112102 + 144.3*reloc, lut= 108181 + 129.6*reloc
(ns)
skip-relocs: buffers= 256: old= 225810 + 165.3*reloc, lut= 221114 + 142.2*reloc
(ns)
skip-relocs: buffers= 512: old= 450470 + 188.8*reloc, lut= 439379 + 169.8*reloc
(ns)
skip-relocs: buffers=1024: old=1420360 + 244.3*reloc, lut=1375216 + 215.9*reloc
(ns)
skip-relocs: buffers=2048: old=4695973 + 329.9*reloc, lut=4606190 + 264.9*reloc
(ns)
no-relocs: buffers=   1: old=   7214 + 51.5*reloc, lut=   7227 + 44.1*reloc
(ns)
no-relocs: buffers=   2: old=   7361 + 53.6*reloc, lut=   7908 + 44.1*reloc
(ns)
no-relocs: buffers=   4: old=   8986 + 51.6*reloc, lut=   8899 + 44.6*reloc
(ns)
no-relocs: buffers=   8: old=  12873 + 51.0*reloc, lut=  13569 + 43.3*reloc
(ns)
no-relocs: buffers=  16: old=  15422 + 51.7*reloc, lut=  15119 + 44.4*reloc
(ns)
no-relocs: buffers=  32: old=  24774 + 51.8*reloc, lut=  23764 + 45.1*reloc
(ns)
no-relocs: buffers=  64: old=  52149 + 51.7*reloc, lut=  50101 + 44.4*reloc
(ns)
no-relocs: buffers= 128: old= 108474 + 52.2*reloc, lut= 104396 + 44.8*reloc
(ns)
no-relocs: buffers= 256: old= 219645 + 56.0*reloc, lut= 211694 + 47.6*reloc
(ns)
no-relocs: buffers= 512: old= 432975 + 70.8*reloc, lut= 420700 + 60.7*reloc
(ns)
no-relocs: buffers=1024: old=1363594 + 93.7*reloc, lut=1310922 + 77.0*reloc
(ns)
no-relocs: buffers=2048: old=4591523 + 64.0*reloc, lut=4497553 + 46.4*reloc
(ns)

real    11m30.839s
user    0m31.562s
sys     10m57.773s


==Reproduce steps==
---------------------------- 
1. ./gem_exec_lut_handle

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