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<base href="https://bugs.freedesktop.org/" />
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<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [Regression BYT] S3 response time large than before"
href="https://bugs.freedesktop.org/show_bug.cgi?id=72210">72210</a>
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[Regression BYT] S3 response time large than before
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Reporter</th>
<td>qingshuai.tian@intel.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</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>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=90070" name="attach_90070" title="dmesg after a round of s3">attachment 90070</a> <a href="attachment.cgi?id=90070&action=edit" title="dmesg after a round of s3">[details]</a></span>
dmesg after a round of s3
Environment:
--------------------
Kernel: (drm-intel-nightly)013133c43b2595ad72d1c66c7afa31dca82132d4
Some additional commit info:
Author: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
Date: Fri Nov 29 15:52:10 2013 +0100
drm-intel-nightly: 2013y-11m-29d-15h-52m-00s integration manifest
Description:
--------------------
On Baytrail, 3 response time of i915 init,suspend and resume are quite larger
than before. It's a regression.
I attach the dmesg in the attachment.
The previous response time we get:(we can check it in <a href="show_bug.cgi?id=72210#c7">comment 7</a> of <a class="bz_bug_link
bz_status_VERIFIED bz_closed"
title="VERIFIED FIXED - [Baytrail-M edp] link training failures on resume"
href="show_bug.cgi?id=69250">bug 69250</a>
):
Acquire initcall time: 1386 msecs
Acquire suspend time: 825 msecs
Acquire resume time: 767 msecs
The response time I get this time is as follows:
Acquire initcall time: 3084msecs
Acquire suspend time: 944 msecs
Acquire resume time: 1100 msecs
Reproduce Steps:
--------------------
1. Rebuild kernel with option CONFIG_PM_TRACE.
2. Boot system with kernel command: initcall_debug drm.debug=0xe
3. perform a suspend-resume cycle by executing 'echo mem > /sys/power/state'
4. The dump the dmesg with the following command:
dmesg | grep -i -e "i915_init\|PM:.*complete\|00:02.0+"</pre>
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