Bug 49534

Summary:	[nvidia-302] Slow chromium tab switching with cairo-1.12.0
Product:	cairo	Reporter:	Jindrich Makovicka <makovick>
Component:	xlib backend	Assignee:	Carl Worth <cworth>
Status:	CLOSED FIXED	QA Contact:	cairo-bugs mailing list <cairo-bugs>
Severity:	normal
Priority:	medium	CC:	mmikucionis, pgriffais, sectoid, wrar
Version:	1.12.2
Hardware:	x86-64 (AMD64)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:
Attachments:	Cairo trace for chromium Xorg log Slightly longer trace

Description Jindrich Makovicka 2012-05-05 06:42:55 UTC

Created attachment 61077 [details]
Cairo trace for chromium

With more tabs containing complex content (reproducible eg. with 4 tabs with cnn.com), switching between tabs takes 1-2 seconds. I was hoping it's for the same reason as in Bug 48395, but this problem persists with nVidia 302.07 beta driver too.

Related bug report in Chromium bug tracker:

http://code.google.com/p/chromium/issues/detail?id=121624

Cairo-perf-trace output with nVidia driver 302.07:

$ cairo-perf-trace chromium.18279
[ # ]  backend                         test   min(s) median(s) stddev. count
[  0]      xcb                     chromium    1.973    1.987   0.62%    6/6
[  0]     xlib                     chromium    3.840    3.870   0.35%    6/6
[ # ]    image: pixman 0.24.4
[  0]    image                     chromium    0.073    0.075   1.37%    6/6
[ # ]  image16: pixman 0.24.4
[  0]  image16                     chromium    0.089    0.090   0.51%    6/6

Comment 1 Jindrich Makovicka 2012-05-05 06:44:41 UTC

Created attachment 61078 [details]
Xorg log

Comment 2 Chris Wilson 2012-05-05 07:54:33 UTC

Hmm, whilst the only usage of cairo within chromium is for the actual rendering of the gtk elements (the tabs), that the xlib/xcb performance is 20-40x times slower is indicative of a problem at least.

Can you please make a slightly longer trace? If you can grab 0.5s worth of image replay, such a trace will be a nice addition to the perf suite.

Comment 3 Jindrich Makovicka 2012-05-05 09:18:24 UTC

Created attachment 61080 [details]
Slightly longer trace

This one takes about 44s for xcb, and 0.2s for image.

Comment 4 Andrey Rahmatullin 2012-05-25 00:09:32 UTC

I have the same problem with 302.11. Here are trace results for resizing of a gvim window with some text:


[ # ]  backend                         test   min(s) median(s) stddev. count
[  0]      xcb                         gvim    4.082    4.199   1.15%    6/6
[  0]     xlib                         gvim    4.202    4.214   0.26%    5/6
[ # ]    image: pixman 0.24.4
[  0]    image                         gvim    0.605    0.610   0.50%    5/6
[ # ]  image16: pixman 0.24.4
[  0]  image16                         gvim    0.611    0.617   0.42%    6/6

I can attach the trace itself if it will help.

Comment 5 Chris Wilson 2012-05-25 01:11:01 UTC

For reference I've added the slightly longer chromium trace to cairo-traces.git (cairo-traces/benchmark/chromium-tab), thanks.

Comment 6 Pierre-Loup A. Griffais 2012-07-30 21:45:14 UTC

Hi all,

Can you please test this against the newly-released 304.30 NVIDIA driver? The issue should be resolved with this driver; I'll mark the bug resolved as soon as it's confirmed.

Sorry for the inconvenience and thanks a lot for the bug report!
 - Pierre-Loup

Comment 7 Jindrich Makovicka 2012-07-30 22:04:05 UTC

Thanks, the tabs in Chromium now switch instantly.

Comment 8 Aaron Plattner 2012-08-07 16:17:15 UTC

Marking CLOSED, since the fix was verified and shipped.

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