Bug 630955 - F-14 kernel causes major slowdown of flash fullscreen video
Summary: F-14 kernel causes major slowdown of flash fullscreen video
Keywords:
Status: CLOSED NOTABUG
Alias: None
Product: Fedora
Classification: Fedora
Component: kernel
Version: 14
Hardware: All
OS: Linux
low
medium
Target Milestone: ---
Assignee: Kernel Maintainer List
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2010-09-07 13:31 UTC by Hans de Goede
Modified: 2010-09-09 20:04 UTC (History)
9 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2010-09-09 20:00:46 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)

Description Hans de Goede 2010-09-07 13:31:56 UTC
Hi,

I noticed recently that fullscreening flash video's from youtube on my 1920x1200 monitor leads to a less then optimal experience, looking at the video info right click menu (only available with some movies for some reason) shows many dropped frames.

Switching back to 2.6.34.6-54.fc13.x86_64 (+ using upstart for the cgroup mountpoint thingie) makes the dropped frames go away. I also tried using upstart
with the 2.6.35.4-12.fc14.x86_64 F-14 kernel, but the problem stays then proving
this is not systemd, but a kernel issue.

I suspect it is kms related. My system uses a ATI Technologies Inc RV570 [Radeon X1950 Pro], with a nVidia Corporation MCP55 PCI Express bridge.

The frame drops seem to happen in bunches, for 2-3 seconds everything is fine and then 10-15 frames all get dropped, then 3 seconds good again, etc.

Regards,

Hans

Comment 1 Chuck Ebbert 2010-09-08 18:35:09 UTC
That's perfectly normal, because we have a bunch of debugging options turned on in that kernel. (You're running what will be the -debug kernel for F14.)

Comment 2 Hans de Goede 2010-09-09 20:00:46 UTC
(In reply to comment #1)
> That's perfectly normal, because we have a bunch of debugging options turned on
> in that kernel. (You're running what will be the -debug kernel for F14.)

Ooh,

I just did a local build of the f14 kernel with the debug options disabled and
you're right. Quite amazing, in some tests I saw xorg cpu usage go from 20% to 70%, I never would have guessed the debug options could make such a huge difference in certain circumstances.

Regards,

Hans

Comment 3 Hans de Goede 2010-09-09 20:04:52 UTC
*** Bug 553059 has been marked as a duplicate of this bug. ***


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