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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [IGT] [BYT] /gem_mmap_gtt subtest basic-wc fails due to Test assertion failure"
href="https://bugs.freedesktop.org/show_bug.cgi?id=97942">97942</a>
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</tr>
<tr>
<th>Summary</th>
<td>[IGT] [BYT] /gem_mmap_gtt subtest basic-wc fails due to Test assertion failure
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
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<th>Version</th>
<td>XOrg git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
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<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>medium
</td>
</tr>
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<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>luis.botello.ortega@intel.com
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
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<pre>Created <span class=""><a href="attachment.cgi?id=126799" name="attach_126799" title="dmesg">attachment 126799</a> <a href="attachment.cgi?id=126799&action=edit" title="dmesg">[details]</a></span>
dmesg
Description
==========================================
gem_mmap_gtt subtest basic-wc fails due to Test assertion failure
Software Configuration
===========================================
drm: commit: 0659558f6418693ad203b5de2f1bc4fa9f28708e
mesa: commit: 8b06176f310f65628ce136b90a99005278ba5e0d
cairo: commit: db8a7f1697c49ae4942d2aa49eed52dd73dd9c7a
xorg-server-macros: commit: d7acec2d3a3abe79814ceb72e2c0d4d95ed31d37
xserver: commit: 3ef51c5c74297937002668b0c507fa88550db67e
xf86-video-intel: commit: 15c5ff12459a034b552c787047d1af6d61047cd6
libva: commit: 7aa2dd979a3758e1f6378344b235595c5028a9e7
vaapi-intel-driver: commit: 36fbd817428d3a257f59bb1ca28ed491c3981616
piglit: commit: 1b071c6304dc69a3f754fd1196afde8f9688bb8e
intel-gpu-tool: commit: 200237acac00f24730b0c5b4362936b6c510b0ed
kernel
commit aab15c274da587bcab19376d2caa9d6626440335
Author: Jani Nikula <<a href="mailto:jani.nikula@intel.com">jani.nikula@intel.com</a>>
Date: Mon Sep 26 15:11:53 2016 +0300
drm-intel-nightly: 2016y-09m-26d-12h-11m-33s UTC integration manifest
Hardware Configuration
=============================================
Platform: Acer Aspire XC-603
CPU: Intel(R) Pentium(R) CPU J2900 @ 2.41GHz (family 6, model 55, stepping 8)
Motherboard: Aspire XC-603
GPU: Intel® HD Graphics - Intel Corporation Atom Processor Z36xxx/Z37xxx Series
Graphics & Display (rev 0e)
Steps to reproduce
=========================================
./gem_mmap_gtt --run-subtest basic-wc
IGT output
==========================================
IGT-Version: 1.16-g32b2021 (x86_64) (Linux: 4.8.0-rc8-nightly+ x86_64)
(gem_mmap_gtt:14618) CRITICAL: Test assertion failure function test_wc, file
gem_mmap_gtt.c:283:
(gem_mmap_gtt:14618) CRITICAL: Failed assertion: gtt_writes > cpu_writes/2
(gem_mmap_gtt:14618) CRITICAL: Write-Combined writes are expected to be roughly
equivalent to WB writes: WC (gtt)=2441.84MiB/s, WB (cpu)=5304.02MiB/s
Stack trace:
#0 [__igt_fail_assert+0xf1]
#1 [__real_main626+0x10ce]
#2 [main+0x29]
#3 [__libc_start_main+0xf0]
#4 [_start+0x29]
#5 [<unknown>+0x29]
Subtest basic-wc failed.
**** DEBUG ****
(gem_mmap_gtt:14618) DEBUG: 3398 GTT reads in 200us
(gem_mmap_gtt:14618) DEBUG: 125022 GTT writes in 200us
(gem_mmap_gtt:14618) DEBUG: 271566 CPU writes in 200us
(gem_mmap_gtt:14618) CRITICAL: Test assertion failure function test_wc, file
gem_mmap_gtt.c:283:
(gem_mmap_gtt:14618) CRITICAL: Failed assertion: gtt_writes > cpu_writes/2
(gem_mmap_gtt:14618) CRITICAL: Write-Combined writes are expected to be roughly
equivalent to WB writes: WC (gtt)=2441.84MiB/s, WB (cpu)=5304.02MiB/s
**** END ****
Subtest basic-wc: FAIL (0.631s)
Attachments
==============================================
dmesg</pre>
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