PerfMon CPU Usage not same as Task Manager reading
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Hi, I am trying to create a CPU Usage monitoring application. I am using PerformanceMonitor to do it. However as I was observing the data from Task Manager's CPU Usage column (Process Tab) and Performance Monitor (Process - % Processor Time) readings, they don't seem to coincide at all (Not even close). I tried to change the Performance Monitors sampling interval, but I can't seem to make the 2 coincide. Does anyone, know why the readings are different? Thanks. :)
SDE
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Hi, I am trying to create a CPU Usage monitoring application. I am using PerformanceMonitor to do it. However as I was observing the data from Task Manager's CPU Usage column (Process Tab) and Performance Monitor (Process - % Processor Time) readings, they don't seem to coincide at all (Not even close). I tried to change the Performance Monitors sampling interval, but I can't seem to make the 2 coincide. Does anyone, know why the readings are different? Thanks. :)
SDE
Expand the CPU section in the PerformanceMonitor and check the CPU readings for processes that are running against the CPU readings for processes in the Task Manager, where do the differences lie?
alex1205 wrote:
they don't seem to coincide at all (Not even close)
How different are the readings? Regards, --Perspx
"The Blue Screen of Death, also known as The Blue Screen of Doom, the "Blue Screen of Fun", "Phatul Exception: The WRECKening" and "Windows Vista", is a multi award-winning game first developed in 1995 by Microsoft" - Uncyclopedia
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Expand the CPU section in the PerformanceMonitor and check the CPU readings for processes that are running against the CPU readings for processes in the Task Manager, where do the differences lie?
alex1205 wrote:
they don't seem to coincide at all (Not even close)
How different are the readings? Regards, --Perspx
"The Blue Screen of Death, also known as The Blue Screen of Doom, the "Blue Screen of Fun", "Phatul Exception: The WRECKening" and "Windows Vista", is a multi award-winning game first developed in 1995 by Microsoft" - Uncyclopedia
Sorry for the late response. Been very busy.
Perspx wrote:
Expand the CPU section in the PerformanceMonitor and check the CPU readings for processes that are running against the CPU readings for processes in the Task Manager, where do the differences lie?
How do I do this? (Sorry newbie here)
Perspx wrote:
How different are the readings?
Very different. Task Manager Says 10% while PerfMon goes to 20% (1 second sampling). :)
SDE
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Sorry for the late response. Been very busy.
Perspx wrote:
Expand the CPU section in the PerformanceMonitor and check the CPU readings for processes that are running against the CPU readings for processes in the Task Manager, where do the differences lie?
How do I do this? (Sorry newbie here)
Perspx wrote:
How different are the readings?
Very different. Task Manager Says 10% while PerfMon goes to 20% (1 second sampling). :)
SDE
alex1205 wrote:
Sorry for the late response. Been very busy.
No worries. :)
alex1205 wrote:
How do I do this? (Sorry newbie here)
In the left pane click on Reliability and Performance. In the right pane a window is shown with boxes with headings Resource Overview, CPU, Disk, Network, Memory and Learn more. In the box with the CPU heading, click on the down arrow to the right of it, which will expand this box and show a list of currently running processes with their CPU usage as a header of the table. You can then compare this to the list of processes and their CPU usage in the Task Manager and see what is different - maybe one or two processes aren't being registered in either application, or their CPU reading isn't being measured accurately. Regards, --Perspx
"The Blue Screen of Death, also known as The Blue Screen of Doom, the "Blue Screen of Fun", "Phatul Exception: The WRECKening" and "Windows Vista", is a multi award-winning game first developed in 1995 by Microsoft" - Uncyclopedia Introduction to Object-Oriented JavaScript
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alex1205 wrote:
Sorry for the late response. Been very busy.
No worries. :)
alex1205 wrote:
How do I do this? (Sorry newbie here)
In the left pane click on Reliability and Performance. In the right pane a window is shown with boxes with headings Resource Overview, CPU, Disk, Network, Memory and Learn more. In the box with the CPU heading, click on the down arrow to the right of it, which will expand this box and show a list of currently running processes with their CPU usage as a header of the table. You can then compare this to the list of processes and their CPU usage in the Task Manager and see what is different - maybe one or two processes aren't being registered in either application, or their CPU reading isn't being measured accurately. Regards, --Perspx
"The Blue Screen of Death, also known as The Blue Screen of Doom, the "Blue Screen of Fun", "Phatul Exception: The WRECKening" and "Windows Vista", is a multi award-winning game first developed in 1995 by Microsoft" - Uncyclopedia Introduction to Object-Oriented JavaScript