I recently upgraded to Maverick and since then the graphics performance of certain 2D programs severely degraded. Especially programs that use wxMathplot with real-time plot updates are affected and show very high CPU on the xorg process and much lower responsiveness of the application.
When I run the same program within Xephyr, the CPU load is much less, also when I run it under ms-windows in VirtualBox. I have tried the stable ppa update for xorg-intel, but this didn't make much difference.
I have done performance analysis with oprofile (on my own applications that uses 10 wxMathplot plots) and found that the the kernel (55%) and libdrm_intel (15%) are eating most of the CPU time.
I created a slightly modified version of sample3 of wxMathplot that shows the CPU impact of 2D operations. Directly under X, CPU usage is as follows: 53% for Xorg and 14% for mpSample3. Under Xephyr, CPU usage is 10% for xorg, 15% for mpSample3 and 11% for Xephyr. I'll attach the source of this modified sample, and if required more of the oprofile log.
Binary package hint: xorg
I recently upgraded to Maverick and since then the graphics performance of certain 2D programs severely degraded. Especially programs that use wxMathplot with real-time plot updates are affected and show very high CPU on the xorg process and much lower responsiveness of the application.
When I run the same program within Xephyr, the CPU load is much less, also when I run it under ms-windows in VirtualBox. I have tried the stable ppa update for xorg-intel, but this didn't make much difference.
I have done performance analysis with oprofile (on my own applications that uses 10 wxMathplot plots) and found that the the kernel (55%) and libdrm_intel (15%) are eating most of the CPU time.
I created a slightly modified version of sample3 of wxMathplot that shows the CPU impact of 2D operations. Directly under X, CPU usage is as follows: 53% for Xorg and 14% for mpSample3. Under Xephyr, CPU usage is 10% for xorg, 15% for mpSample3 and 11% for Xephyr. I'll attach the source of this modified sample, and if required more of the oprofile log.
ProblemType: Bug ature: Ubuntu 2.6.35- 28.49-generic 2.6.35.11 //wAGr+ wgAAAAAAESAQOAI hN4CldVnFpUnSYa UFQAAAABAQEBAQE BAQEBAQEBAQEBEh tWQlAAJjAgGDQAW MEQAAAYAAAADwAA AAAAAAAAAAAAAAA gAAAA/gBBVU8KIC AgICAgICAgAAAA/ gBCMTU2WFcwMiBW MCAKAF8= //wAebXdWUEUDAA MUAQNqMSB46q7Fo ldKnCUSUFSna4CV D5UAgYCBQHFPAQE BAQEBfC6QoGAaHk AwIDYA2igRAAAaI TmQMGIaJ0BosDYA 2igRAAAcAAAA/ QA4Sx5TDwAKICAg ICAgAAAA/ ABXMjI0MgogICAg ICAgAK4= /boot/vmlinuz- 2.6.35- 28-generic root=UUID= 72a7f734- 513b-40d0- 9cbe-cc16ffb423 9a ro quiet splash nl_NL.UTF- 8 asset.tag: CNU0064GLG Packard: bvr68PVUVer. F.0D:bd12/ 17/2009: svnHewlett- Packard: pnCompaq610: pvrF.0D: rvnHewlett- Packard: rn308A: rvrKBCVersion26 .08:cvnHewlett- Packard: ct10:cvr: version: F.0D
DistroRelease: Ubuntu 10.10
Package: xorg 1:7.5+6ubuntu3
ProcVersionSign
Uname: Linux 2.6.35-28-generic i686
Architecture: i386
DRM.card0.LVDS.1:
status: connected
enabled: enabled
dpms: On
modes: 1366x768
edid-base64: AP/////
DRM.card0.VGA.1:
status: connected
enabled: enabled
dpms: On
modes: 1680x1050 1680x1050 1280x1024 1280x1024 1440x900 1440x900 1280x960 1152x864 1024x768 1024x768 832x624 800x600 800x600 800x600 640x480 640x480 720x400
edid-base64: AP/////
Date: Wed Mar 23 21:13:46 2011
InstallationMedia: Ubuntu-Netbook 10.04 "Lucid Lynx" - Release i386 (20100429.4)
MachineType: Hewlett-Packard Compaq 610
ProcCmdLine: BOOT_IMAGE=
ProcEnviron:
LC_TIME=
PATH=(custom, user)
LANG=C
SHELL=/bin/bash
LC_PAPER=A4
SourcePackage: xorg
Symptom: display
dmi.bios.date: 12/17/2009
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 68PVU Ver. F.0D
dmi.board.name: 308A
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 26.08
dmi.chassis.
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-
dmi.product.name: Compaq 610
dmi.product.
dmi.sys.vendor: Hewlett-Packard
system:
distro: Ubuntu
codename: maverick
architecture: i686
kernel: 2.6.35-28-generic