What is the sampling interval on a Win32_PerfFormattedData class? Can I change it?
We've got a few questions here covering how to determine per-process CPU usage. The most "turnkey" way is to run a WMI query using Win32_PerfFormattedData_PerfProc_Process to get PercentProcessorTime.
These "formatted" classes are wrappers around the corresponding raw version of the class, e.g., Win32_PerfRawData_PerfProc_Process. The documentation for Win32_PerfFormattedData_PerfProc_Process tells us its values are formed from the raw class using a CookingType of PERF_100NSEC_TIMER with a PerfTimeFreq of Frequency_Sys100NS. This means that the interval used to calculate the values from the raw class is whatever the value of Frequency_Sys100NS is.
Now, if I look at properties like Frequency_Sys100NS on instances of the data returned from the formatted class, they are NULL. But on the raw class, I do see a value of 10000000, which I am guessing means the formatted class gets raw values separated by 1 second (10000000 * 100NS = 1 second).
Am I interpreting this right? Is there any way to change the sampling frequency of the classes to get per process CPU usage sampled over a larger or smaller interval? I could use the raw classes and do it myself, keeping track of per-process raw values, but it would be nice to leverage the existing infrastructure to do the work for me.
wmi cpu-usage wmi-query
asked Nov 12 at 15:04
aggieNick02
97711019
add a comment |
We've got a few questions here covering how to determine per-process CPU usage. The most "turnkey" way is to run a WMI query using Win32_PerfFormattedData_PerfProc_Process to get PercentProcessorTime.
These "formatted" classes are wrappers around the corresponding raw version of the class, e.g., Win32_PerfRawData_PerfProc_Process. The documentation for Win32_PerfFormattedData_PerfProc_Process tells us its values are formed from the raw class using a CookingType of PERF_100NSEC_TIMER with a PerfTimeFreq of Frequency_Sys100NS. This means that the interval used to calculate the values from the raw class is whatever the value of Frequency_Sys100NS is.
Now, if I look at properties like Frequency_Sys100NS on instances of the data returned from the formatted class, they are NULL. But on the raw class, I do see a value of 10000000, which I am guessing means the formatted class gets raw values separated by 1 second (10000000 * 100NS = 1 second).
Am I interpreting this right? Is there any way to change the sampling frequency of the classes to get per process CPU usage sampled over a larger or smaller interval? I could use the raw classes and do it myself, keeping track of per-process raw values, but it would be nice to leverage the existing infrastructure to do the work for me.
wmi cpu-usage wmi-query
asked Nov 12 at 15:04
aggieNick02
97711019
add a comment |
We've got a few questions here covering how to determine per-process CPU usage. The most "turnkey" way is to run a WMI query using Win32_PerfFormattedData_PerfProc_Process to get PercentProcessorTime.
These "formatted" classes are wrappers around the corresponding raw version of the class, e.g., Win32_PerfRawData_PerfProc_Process. The documentation for Win32_PerfFormattedData_PerfProc_Process tells us its values are formed from the raw class using a CookingType of PERF_100NSEC_TIMER with a PerfTimeFreq of Frequency_Sys100NS. This means that the interval used to calculate the values from the raw class is whatever the value of Frequency_Sys100NS is.
Now, if I look at properties like Frequency_Sys100NS on instances of the data returned from the formatted class, they are NULL. But on the raw class, I do see a value of 10000000, which I am guessing means the formatted class gets raw values separated by 1 second (10000000 * 100NS = 1 second).
Am I interpreting this right? Is there any way to change the sampling frequency of the classes to get per process CPU usage sampled over a larger or smaller interval? I could use the raw classes and do it myself, keeping track of per-process raw values, but it would be nice to leverage the existing infrastructure to do the work for me.
wmi cpu-usage wmi-query
asked Nov 12 at 15:04
aggieNick02
97711019
We've got a few questions here covering how to determine per-process CPU usage. The most "turnkey" way is to run a WMI query using Win32_PerfFormattedData_PerfProc_Process to get PercentProcessorTime.
These "formatted" classes are wrappers around the corresponding raw version of the class, e.g., Win32_PerfRawData_PerfProc_Process. The documentation for Win32_PerfFormattedData_PerfProc_Process tells us its values are formed from the raw class using a CookingType of PERF_100NSEC_TIMER with a PerfTimeFreq of Frequency_Sys100NS. This means that the interval used to calculate the values from the raw class is whatever the value of Frequency_Sys100NS is.
Now, if I look at properties like Frequency_Sys100NS on instances of the data returned from the formatted class, they are NULL. But on the raw class, I do see a value of 10000000, which I am guessing means the formatted class gets raw values separated by 1 second (10000000 * 100NS = 1 second).
Am I interpreting this right? Is there any way to change the sampling frequency of the classes to get per process CPU usage sampled over a larger or smaller interval? I could use the raw classes and do it myself, keeping track of per-process raw values, but it would be nice to leverage the existing infrastructure to do the work for me.
wmi cpu-usage wmi-query
wmi cpu-usage wmi-query
asked Nov 12 at 15:04
aggieNick02
97711019
asked Nov 12 at 15:04
aggieNick02
97711019
asked Nov 12 at 15:04
aggieNick02
97711019
asked Nov 12 at 15:04
aggieNick02
97711019
asked Nov 12 at 15:04
aggieNick02
97711019
97711019
add a comment |
add a comment |
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