<html>
<head>
<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Priority</th>
<td>high
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - igt/gem_pwrite segfault"
href="https://bugs.freedesktop.org/show_bug.cgi?id=68003">68003</a>
</td>
</tr>
<tr>
<th>Assignee</th>
<td>chris@chris-wilson.co.uk
</td>
</tr>
<tr>
<th>Summary</th>
<td>igt/gem_pwrite segfault
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>major
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Reporter</th>
<td>huax.lu@intel.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=83954" name="attach_83954" title="dmesg">attachment 83954</a> <a href="attachment.cgi?id=83954&action=edit" title="dmesg">[details]</a></span>
dmesg
System Environment:
--------------------------
Platform: PNV/ILK/SNB/IVB/HSW
Kernel: drm-intel-nightly(8894ac87e4db055bbdd44647c1ce2df274400264)
Bug detailed description:
-----------------------------
It fails on all platforms: PNV/ILK/SNB/IVB/HSW.It happens on drm-intel-nightly,
drm-intel-next-queued, drm-intel-fixes kernel.
Bisect shows: 467796acc80ced3440740d267c2e2a4f246d4b8a is the first bad commit.
commit 467796acc80ced3440740d267c2e2a4f246d4b8a
Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
AuthorDate: Sat Aug 10 15:49:33 2013 +0100
Commit: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
CommitDate: Sat Aug 10 15:49:33 2013 +0100
Expand gem_set_cacheing testing to handle the proposed DISPLAY domain
output:
Time to pwrite 16384 bytes x 1: 22.000µs, 744.7MiB/s
Time to pwrite 16384 bytes x 2: 5.000µs, 3.3GiB/s
Time to pwrite 16384 bytes x 4: 3.750µs, 4.4GiB/s
Time to pwrite 16384 bytes x 8: 3.625µs, 4.5GiB/s
Time to pwrite 16384 bytes x 16: 3.500µs, 4.7GiB/s
Time to pwrite 16384 bytes x 32: 3.844µs, 4.3GiB/s
Time to pwrite 16384 bytes x 64: 4.516µs, 3.6GiB/s
Time to pwrite 16384 bytes x 128: 3.664µs, 4.5GiB/s
Time to pwrite 16384 bytes x 256: 3.551µs, 4.6GiB/s
Time to pwrite 16384 bytes x 512: 3.482µs, 4.7GiB/s
Time to pwrite 16384 bytes x 1024: 3.450µs, 4.7GiB/s
Time to pwrite 16384 bytes x 2048: 3.433µs, 4.8GiB/s
Time to pwrite 16384 bytes x 4096: 3.433µs, 4.8GiB/s
Time to pwrite 16384 bytes x 8192: 3.433µs, 4.8GiB/s
Time to pwrite 16384 bytes x 16384: 3.431µs, 4.8GiB/s
Time to pwrite 16384 bytes x 32768: 3.424µs, 4.8GiB/s
Time to pwrite 16384 bytes x 65536: 3.427µs, 4.8GiB/s
Time to pwrite 16384 bytes x 131072: 3.430µs, 4.8GiB/s
Time to (null) pwrite 16384 bytes x 1: 4.000µs, 4.1GiB/s
Time to (null) pwrite 16384 bytes x 2: 3.500µs, 4.7GiB/s
Time to (null) pwrite 16384 bytes x 4: 3.750µs, 4.4GiB/s
Time to (null) pwrite 16384 bytes x 8: 3.500µs, 4.7GiB/s
Time to (null) pwrite 16384 bytes x 16: 3.500µs, 4.7GiB/s
Time to (null) pwrite 16384 bytes x 32: 3.469µs, 4.7GiB/s
Time to (null) pwrite 16384 bytes x 64: 4.250µs, 3.9GiB/s
Time to (null) pwrite 16384 bytes x 128: 3.742µs, 4.4GiB/s
Time to (null) pwrite 16384 bytes x 256: 3.559µs, 4.6GiB/s
Time to (null) pwrite 16384 bytes x 512: 3.498µs, 4.7GiB/s
Time to (null) pwrite 16384 bytes x 1024: 3.459µs, 4.7GiB/s
Time to (null) pwrite 16384 bytes x 2048: 3.444µs, 4.8GiB/s
Time to (null) pwrite 16384 bytes x 4096: 3.437µs, 4.8GiB/s
Time to (null) pwrite 16384 bytes x 8192: 3.419µs, 4.8GiB/s
Time to (null) pwrite 16384 bytes x 16384: 3.423µs, 4.8GiB/s
Time to (null) pwrite 16384 bytes x 32768: 3.431µs, 4.8GiB/s
Time to (null) pwrite 16384 bytes x 65536: 3.433µs, 4.8GiB/s
Time to (null) pwrite 16384 bytes x 131072: 3.429µs, 4.8GiB/s
Segmentation fault (core dumped)
Reproduce steps:
----------------------------
1. ./gem_pwrite</pre>
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