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Old 03-20-12, 03:17 PM   #1
tmehrkam
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Join Date: Mar 2012
Posts: 3
Default NVS Quadro 450 poor performance.

I am trying to upgrade from an obsolete NVS Quadro 440 video card.

We are running 64 bit RedHat EL 5.4 on a Dell R710 server. The system is part of a data acquisition system running on research vessels world wide.

The NVS 440 card works fine in our application but the NVS 450 falls flat on it's face when we run one of our apps.

The app displays 12,000 little bar graphs displaying RMS data from 12,000 sensors. This data is updated every 512 ms.

We are using QT 4.6.2 to develop our displays. The problem is when the gain is increased so that the signals clip. The display gets very unresponsive.

Any IDEA why the NVS 450 would show significantly worse performance than the NVS 440. We tried and saw the same thing with the NVS 420.

We are driving 4 displays. Running twin-view and Xinerama. To map 4 monitors into one X window.

------------------------------------ Xorg.conf
# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig: version 256.53 (buildmeister@builder97.nvidia.com) Fri Aug 27 20:55:22 PDT 2010

# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings: version 256.53 (buildmeister@builder97.nvidia.com) Fri Aug 27 20:55:01 PDT 2010
# Xorg configuration created by system-config-display

Section "ServerLayout"


Identifier "Default Layout"
Screen 0 "Screen0"
Screen 1 "Screen1" RightOf "Screen0"
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
Option "Xinerama" "1"
EndSection

Section "InputDevice"

# generated from default
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/input/mice"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
Option "XkbModel" "pc105"
Option "XkbLayout" "us"
EndSection

Section "Monitor"
Identifier "Monitor0"
VendorName "Unknown"
ModelName "Unknown"
HorizSync 28.0 - 33.0
VertRefresh 43.0 - 72.0
Option "DPMS"
EndSection

Section "Monitor"
Identifier "Monitor1"
VendorName "Unknown"
ModelName "Unknown"
HorizSync 28.0 - 33.0
VertRefresh 43.0 - 72.0
Option "DPMS"
EndSection

Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "Quadro NVS 450"
BusID "PCI:12:0:0"
EndSection

Section "Device"
Identifier "Device1"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "Quadro NVS 450"
BusID "PCI:13:0:0"
EndSection

Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 16
Option "TwinView" "True"
Option "MetaModes" "nvidia-auto-select, nvidia-auto-select"
SubSection "Display"
Depth 16
EndSubSection
EndSection

Section "Screen"
Identifier "Screen1"
Device "Device1"
Monitor "Monitor1"
DefaultDepth 16
Option "TwinView" "True"
Option "MetaModes" "nvidia-auto-select, nvidia-auto-select"
SubSection "Display"
Depth 16
EndSubSection
EndSection

Section "Extensions"
Option "Composite" "Disable"
EndSection

Last edited by tmehrkam; 03-20-12 at 03:25 PM. Reason: Add more information about configuration
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