I found much slower performances using default acceleration (EXA) than with XAA (using Option "AccelMethod" "XAA").
Using gtkPerf, global speed is 23s with XAA and 33s with EXA. When digging in tests, its mainly text drawing that have worst results (ex. 4.11s vs 9.79s).
I tested with different versions :
2.2.1 - default settings - 4.11s
2.5.1 - default settings - 7.83s
2.6.99 - default settings - 9.79s
2.6.99 - Option "AccelMethod" "XAA" - 5.91s
Needs basic information attached like Xorg.0.log and dmesg.
Created attachment 21155 [details]
GTKPerf with EXA
Created attachment 21156 [details]
GTKPerf with XAA
Created attachment 21157 [details]
Worg logs with EXA
Created attachment 21158 [details]
xorg logs with XAA
Created attachment 21159 [details]
Created attachment 21160 [details]
dmesg log from boot
Well, I added as much as I can. Tell me if you need more.
Xorg conf is the same in both test case, with only the option for switching to XAA to EXA changing. I enabled debug option also.
For dmesg I take it from boot to xorg with EXA. When restarting XORG with XAA it only adds this :
[drm:i915_getparam] *ERROR* Unknown parameter 5
Ulhume, we're moving to GEM based 2D rendering acceleration UXA to make the most perf out of our hw. So please test with kernel 2.6.28, libdrm 2.4.3, recent xf86-video-intel.
Here's gtkperf result on my 945GM with UXA.
GtkPerf 0.40 - Starting testing: Tue Dec 30 07:50:10 2008
GtkEntry - time: 0.04
GtkComboBox - time: 3.89
GtkComboBoxEntry - time: 3.43
GtkSpinButton - time: 0.74
GtkProgressBar - time: 1.01
GtkToggleButton - time: 2.09
GtkCheckButton - time: 1.47
GtkRadioButton - time: 1.81
GtkTextView - Add text - time: 0.83
GtkTextView - Scroll - time: 0.80
GtkDrawingArea - Lines - time: 1.53
GtkDrawingArea - Circles - time: 2.47
GtkDrawingArea - Text - time: 2.47
GtkDrawingArea - Pixbufs - time: 0.40
Total time: 23.00
I tried the upgrade but I'm running into problems when the driver try to switch to UXA. In logs I have this :
undefined symbol: exaDriverAlloc
When I switch back to EXA, I can run the server again. Perhaps this is a Mandriva specific problem abour 2.6.28 kernel as with it, display is 3 times slower than with 2.6.27 kernel (gtkperf give me 102s when the same driver give 30s with 2.6.27).
If you have any hint for me, I'll appreciate. If I have some time I'll try to build a vanilla kernel in order to see if slow down problem is Mandriva specific ou not.
You might not have a clean build?
The versions for current stable is kernel 2.6.28, libdrm 2.4.3, xf86-video-intel-2.6-branch, xserver-1.6-branch. http://www.x.org/wiki/Development/git has some building info.
Ulhume, no update? Please try to build with recent releases, kernel, mesa, drm, xf86-video-intel. I close it now, feel free to open if you still see this issue.