[Bug 81735] New: [BSW]igt/gem_exec_lut_handle cost long time to execute sporadically

Fri Jul 25 01:42:24 PDT 2014

https://bugs.freedesktop.org/show_bug.cgi?id=81735

          Priority: medium
            Bug ID: 81735
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [BSW]igt/gem_exec_lut_handle cost long time to execute
                    sporadically
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: jinxianx.guo at intel.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 103430
  --> https://bugs.freedesktop.org/attachment.cgi?id=103430&action=edit
dmesg

==System Environment==
--------------------------
Regression: No
The fail rate about 1 out of 5

Non-working platforms: BSW

==kernel==
--------------------------
origin/drm-intel-nightly: 089bea2664988de48fccc81407ebe12115156731(fails)
    drm-intel-nightly: 2014y-07m-24d-09h-55m-38s integration manifest
origin/drm-intel-next-queued: 2b8ee5710915a244b807fbe3427299d007d19e89(fails)
    drm/i915: Allow overlapping userptr objects  
origin/drm-intel-fixes: eedd10f45bdcb2a5b2afa35f845e080c3bc984f2(fails)
    drm/i915: Simplify i915_gem_release_all_mmaps()

==Bug detailed description==
-----------------------------
igt/gem_exec_lut_handle cost long time to execute sporadically

Output:
[root at x-bsw01 tests]# time ./gem_exec_lut_handle
IGT-Version: 1.7-g4d4f4b2 (x86_64) (Linux:
3.16.0-rc6_drm-intel-nightly_089bea_20140725_debug+ x86_64)
relocation: buffers=   1: old= 105904 + 180.9*reloc, lut= 102425 + 173.7*reloc
(ns)
relocation: buffers=   2: old= 104746 + 183.0*reloc, lut= 104779 + 173.9*reloc
(ns)
relocation: buffers=   4: old= 107092 + 182.0*reloc, lut= 107067 + 173.6*reloc
(ns)
relocation: buffers=   8: old= 113138 + 181.9*reloc, lut= 111362 + 173.7*reloc
(ns)
relocation: buffers=  16: old= 122958 + 182.4*reloc, lut= 122497 + 173.9*reloc
(ns)
relocation: buffers=  32: old= 144296 + 182.9*reloc, lut= 143878 + 174.1*reloc
(ns)
relocation: buffers=  64: old= 188723 + 185.5*reloc, lut= 187134 + 176.3*reloc
(ns)
relocation: buffers= 128: old= 277146 + 190.2*reloc, lut= 275321 + 179.9*reloc
(ns)
relocation: buffers= 256: old= 458424 + 199.5*reloc, lut= 454968 + 186.3*reloc
(ns)
relocation: buffers= 512: old= 803739 + 226.0*reloc, lut= 798157 + 195.7*reloc
(ns)
relocation: buffers=1024: old=1865623 + 323.2*reloc, lut=1904592 + 260.9*reloc
(ns)
relocation: buffers=2048: old=7074389 + 436.8*reloc, lut=7076460 + 315.6*reloc
(ns)
skip-relocs: buffers=   1: old= 100994 + 91.6*reloc, lut= 100750 + 85.5*reloc
(ns)
skip-relocs: buffers=   2: old= 102906 + 91.5*reloc, lut= 101958 + 85.5*reloc
(ns)
skip-relocs: buffers=   4: old= 105166 + 91.3*reloc, lut= 104126 + 85.5*reloc
(ns)
skip-relocs: buffers=   8: old= 111004 + 91.3*reloc, lut= 109197 + 85.3*reloc
(ns)
skip-relocs: buffers=  16: old= 121325 + 93.1*reloc, lut= 121063 + 85.2*reloc
(ns)
skip-relocs: buffers=  32: old= 142916 + 91.7*reloc, lut= 142387 + 85.2*reloc
(ns)
skip-relocs: buffers=  64: old= 186514 + 93.1*reloc, lut= 185571 + 85.6*reloc
(ns)
skip-relocs: buffers= 128: old= 274873 + 97.1*reloc, lut= 273076 + 88.7*reloc
(ns)
skip-relocs: buffers= 256: old= 456788 + 106.4*reloc, lut= 453750 + 94.1*reloc
(ns)
skip-relocs: buffers= 512: old= 806428 + 130.0*reloc, lut= 802482 + 103.1*reloc
(ns)
skip-relocs: buffers=1024: old=1895140 + 212.7*reloc, lut=1929344 + 159.2*reloc
(ns)
skip-relocs: buffers=2048: old=7058420 + 321.6*reloc, lut=7064467 + 214.6*reloc
(ns)
no-relocs: buffers=   1: old= 100038 + 30.8*reloc, lut= 100159 + 23.7*reloc
(ns)
no-relocs: buffers=   2: old= 102166 + 30.7*reloc, lut= 101549 + 23.9*reloc
(ns)
no-relocs: buffers=   4: old= 104208 + 30.7*reloc, lut= 104186 + 23.9*reloc
(ns)
no-relocs: buffers=   8: old= 109841 + 30.8*reloc, lut= 108595 + 23.9*reloc
(ns)
no-relocs: buffers=  16: old= 121203 + 30.4*reloc, lut= 119996 + 23.8*reloc
(ns)
no-relocs: buffers=  32: old= 141550 + 30.6*reloc, lut= 140940 + 23.7*reloc
(ns)
no-relocs: buffers=  64: old= 184514 + 30.6*reloc, lut= 183211 + 23.6*reloc
(ns)
no-relocs: buffers= 128: old= 270394 + 30.4*reloc, lut= 268552 + 23.4*reloc
(ns)
no-relocs: buffers= 256: old= 448667 + 30.4*reloc, lut= 445651 + 22.6*reloc
(ns)
no-relocs: buffers= 512: old= 785921 + 33.1*reloc, lut= 779181 + 24.3*reloc
(ns)
no-relocs: buffers=1024: old=1826164 + 59.9*reloc, lut=1847018 + 49.0*reloc
(ns)
no-relocs: buffers=2048: old=6972076 + 41.9*reloc, lut=6975994 + 30.0*reloc
(ns)

real    15m53.222s
user    0m20.729s
sys     15m29.287s


Reproduce steps:
-------------------------
1. ./gem_exec_lut_handle

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