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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 --- - [BYT] System fail to enter package c6 using 2014Q1 release package"
href="https://bugs.freedesktop.org/show_bug.cgi?id=76543">76543</a>
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</tr>
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<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>[BYT] System fail to enter package c6 using 2014Q1 release package
</td>
</tr>
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<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>
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<th>OS</th>
<td>Linux (All)
</td>
</tr>
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<th>Reporter</th>
<td>wendy.wang@intel.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
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<th>Product</th>
<td>DRI
</td>
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<p>
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<pre>Load the 2014Q1 release package kernel and other GFX components drivers:
Kernel_version: 3.13.6
Libdrm: (master)libdrm-2.4.52
Mesa: (10.1) mesa-10.1
Xserver: (server-1.15-branch)xorg-server-1.15.0
Xf86_video_intel: (master)2.99.910
Cairo: (master)1.12.6
Libva: 1.3.0.pre1
Libva_intel_driver: 1.3.0.pre1
Intel-gpu-tools: 1.6
1. Set the disk link power management policies to min_power.
For each host${i} directory inside /sys/class/scsi_host/, echo min_power >
host${i}/link_power_management_policy
2. Run ./turbostat tool to wait for the PC6 results, but we did not see any PC6
residency always show 0
cor CPU %c0 GHz TSC SMI %c1 %c3 %c6 CTMP %pc3 %pc6
0.22 0.65 2.00 0 0.48 0.00 99.30 32 0.00 0.00
0 0 0.30 0.65 2.00 0 0.37 0.00 99.33 32 0.00 0.00
1 1 0.14 0.67 2.00 0 0.60 0.00 99.27 32
cor CPU %c0 GHz TSC SMI %c1 %c3 %c6 CTMP %pc3 %pc6
0.21 0.72 2.00 0 4.27 0.00 95.51 32 0.00 0.00
0 0 0.30 0.74 2.00 0 0.26 0.00 99.44 32 0.00 0.00
1 1 0.12 0.68 2.00 0 8.28 0.00 91.59 32
cor CPU %c0 GHz TSC SMI %c1 %c3 %c6 CTMP %pc3 %pc6
0.31 0.85 2.00 0 0.31 0.00 99.38 32 0.00 0.00
0 0 0.49 0.89 2.00 0 0.36 0.00 99.16 32 0.00 0.00
1 1 0.13 0.69 2.00 0 0.27 0.00 99.60 32
cor CPU %c0 GHz TSC SMI %c1 %c3 %c6 CTMP %pc3 %pc6
0.21 0.68 2.00 0 0.35 0.00 99.44 32 0.00 0.00
0 0 0.30 0.68 2.00 0 0.28 0.00 99.42 32 0.00 0.00
1 1 0.13 0.67 2.00 0 0.42 0.00 99.46 32</pre>
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