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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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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 --- - [KMS] Extremely low performance of XDrawImageString"
href="https://bugs.freedesktop.org/show_bug.cgi?id=55296">55296</a>
</td>
</tr>
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<th>Assignee</th>
<td>xorg-driver-ati@lists.x.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[KMS] Extremely low performance of XDrawImageString
</td>
</tr>
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<th>QA Contact</th>
<td>xorg-team@lists.x.org
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
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<th>Reporter</th>
<td>mihail.zenkov@gmail.com
</td>
</tr>
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<th>Hardware</th>
<td>x86 (IA32)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Component</th>
<td>Driver/Radeon
</td>
</tr>
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<th>Product</th>
<td>xorg
</td>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=67652" name="attach_67652" title="test.c">attachment 67652</a> <a href="attachment.cgi?id=67652&action=edit" title="test.c">[details]</a></span>
test.c
I have performance problem in simple terminal apps like st (st.suckless.org)
that render text without xft. With "NoAccel" "1" or "RenderAccel" "0" problem
gone.
I write simple test and have result:
1. default x.org configuration: 2000 ms
2. with "RenderAccel" "0": 70-170 ms
3. with "NoAccel" "1": 18-30 ms
I also run gtkperf -ac1000 and see many test faster with "RenderAccel" "0".
Default x.org configuration:
GtkEntry - time: 0,22
GtkComboBox - time: 14,89
GtkComboBoxEntry - time: 17,33
GtkSpinButton - time: 0,39
GtkProgressBar - time: 0,42
GtkToggleButton - time: 0,36
GtkCheckButton - time: 0,34
GtkRadioButton - time: 1,90
GtkTextView - Add text - time: 12,98
GtkTextView - Scroll - time: 2,31
GtkDrawingArea - Lines - time: 15,77
GtkDrawingArea - Circles - time: 9,08
GtkDrawingArea - Text - time: 4,74
GtkDrawingArea - Pixbufs - time: 1,84
---
Total time: 82,59
With "RenderAccel" "0":
GtkEntry - time: 0,22
GtkComboBox - time: 10,63
GtkComboBoxEntry - time: 11,35
GtkSpinButton - time: 0,31
GtkProgressBar - time: 0,31
GtkToggleButton - time: 0,34
GtkCheckButton - time: 0,34
GtkRadioButton - time: 0,82
GtkTextView - Add text - time: 13,21
GtkTextView - Scroll - time: 2,51
GtkDrawingArea - Lines - time: 28,74
GtkDrawingArea - Circles - time: 9,25
GtkDrawingArea - Text - time: 8,58
GtkDrawingArea - Pixbufs - time: 2,16
---
Total time: 88,78
HD6770, kernel-3.5, xorg-server-1.12.4, libdrm-2.4.39, xf86-video-ati-6.14.6</pre>
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