Opened 11 years ago

Closed 11 years ago

#10571 closed bug (fixed)

Slow app_server drawing with new scheduler

Reported by: jua Owned by: pdziepak
Priority: normal Milestone: R1
Component: System/Kernel Version: R1/Development
Keywords: scheduler graphics app_server Cc:
Blocked By: Blocking:
Platform: All

Description (last modified by jua)

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:

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 (less than 10fps 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.

Attachments (4)

chart_hrev46684.png​ (105.8 KB ) - added by jua 11 years ago.
Running Chart on hrev46684 (old scheduler)
chart_hrev46699.png​ (93.3 KB ) - added by jua 11 years ago.
Running Chart on hrev46699 (new scheduler)
chart_hrev46893.png​ (92.3 KB ) - added by jua 11 years ago.
Running Chart on hrev46893 (new scheduler, latest)
syslog​ (182.8 KB ) - added by jua 11 years ago.

Download all attachments as: .zip

Change History (9)

by jua, 11 years ago

Attachment: chart_hrev46684.png​ added

Running Chart on hrev46684 (old scheduler)

by jua, 11 years ago

Attachment: chart_hrev46699.png​ added

Running Chart on hrev46699 (new scheduler)

by jua, 11 years ago

Attachment: chart_hrev46893.png​ added

Running Chart on hrev46893 (new scheduler, latest)

comment:1 by jua, 11 years ago

Description: modified (diff)

comment:2 by anevilyak, 11 years ago

Owner: changed from axeld to pdziepak
Status: new → assigned

comment:3 by pdziepak, 11 years ago

Is the problem still present when running Haiku with SMP disabled? Also, full syslog may be useful.

in reply to:  3 comment:4 by jua, 11 years ago

Replying to pdziepak:

Is the problem still present when running Haiku with SMP disabled?

Yes, makes no difference.

Also, full syslog may be useful.

See below.

by jua, 11 years ago

Attachment: syslog​ added

comment:5 by jua, 11 years ago

Resolution: → fixed
Status: assigned → closed

Found the bug in the changes to generic_x86 add-on. Fixed in hrev46941

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