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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 --- - [nouveau] drmModeSetCursor->nouveau_bo_rd32->ioread32 provides high cpu load when using weston drm-compositor"
href="https://bugs.freedesktop.org/show_bug.cgi?id=63192">63192</a>
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<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[nouveau] drmModeSetCursor->nouveau_bo_rd32->ioread32 provides high cpu load when using weston drm-compositor
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr>
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<th>OS</th>
<td>Linux (All)
</td>
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<th>Reporter</th>
<td>vova7890@mail.ru
</td>
</tr>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Version</th>
<td>DRI CVS
</td>
</tr>
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<th>Component</th>
<td>DRM/other
</td>
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<th>Product</th>
<td>DRI
</td>
</tr></table>
<p>
<div>
<pre>Weston runned in drm-mode provide very high cpu load on mouse moving. I don`t
think that the bug of weston, seems problem in nouveau drm. At launch weston
have a log:
...
[24465.734894] nouveau W[ PFIFO][0000:02:00.0] INTR 0x00000001: 0x00000004
[24465.748153] nouveau W[ PFIFO][0000:02:00.0] INTR 0x00000001: 0x00000004
[24521.950788] nouveau W[ PFIFO][0000:02:00.0] INTR 0x00000001: 0x00000004
[24521.955032] nouveau W[ PFIFO][0000:02:00.0] INTR 0x00000001: 0x00000004
...
ioread32_native(ioread32 on litle-endian) using 100% of cpu core. If in weston
comment out drmModeSetCursor - cpu load is normal, but no see cursor ofcourse.
They copying cursor(64x64) from bo-object. Seems TTM iomem access provide very
high cpu load... On radeon it works smoothly and no have very high cpu load.
Kernel 3.9-rc5 (x86_64)
Wayland/Weston: git
Mesa: git
libdrm: git</pre>
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