[haiku-bugs] [Haiku] #10571: Slow app_server drawing with new scheduler
- From: "jua" <trac@xxxxxxxxxxxx>
- Date: Thu, 20 Feb 2014 23:54:04 -0000
#10571: Slow app_server drawing with new scheduler
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Reporter: jua | Owner: axeld
Type: bug | Status: new
Priority: normal | Milestone: R1
Component: System/Kernel | Version: R1/Development
Keywords: scheduler graphics app_server | Blocked By:
Blocking: | Has a Patch: 0
Platform: All |
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With the new scheduler, I get very slow graphics drawing on my machine.
Dragging windows around is slow and lagging, same with e.g. scrolling a
website in WebPositive. Fluid video playback is impossible.
A good way to benchmark this is the "Chart" application from our Demos
folder. I tested with 3 Haiku revisions:
* hrev46684 (nightly right before the scheduler merge)
* hrev46699 (nightly right after the scheduler merge)
* hrev46893 (latest nightly)
Selecting "DirectWindow" as display method in Chart, all three revisions
get fluid 60fps with 3% CPU usage. However, using "DrawBitmap", the
problem becomes apparent: only the pre-scheduler-merge version performs
well and fluid, the others suffer from very bad performance even at 100%
CPU usage.
I'm attaching 3 screenshots of the test which also show ActivityMonitor.
Test system: AMD E-450 APU (dual core), Radeon HD6320, 2GB RAM. Same
behaviour with both, radeon_hd and VESA graphics driver.
Let me know if further information is required.
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Ticket URL: <https://dev.haiku-os.org/ticket/10571>
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