Windows 10: Performance monitor counter values VS System.Diagnostics.PerformanceCounter.NextValue C#

Hi,I'm collecting data using System.Diagnostics.PerformanceCounter in a C# program. I made a test where I compared values from performance monitor with the one I got from my program. I can see the values look shifted. For example I put a screenshot hereafter,I can't figure if I should multiply or divide the values. Since I'm not just monitoring memory values, I need to know for any counter if there is some math with the value to do, otherwise I can't interpret values that come from Performance monitor, nor System.Diagnostic.There is any documentation about that ? otherwise how can I figure tha

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Do we need an Administrator Privileges to access Performance Counters?

Hi experts,

Recently, I tried to use PerformanceCounter to query some counters of the system.

PerformanceCounter Constructor (System.Diagnostics) | Microsoft Docs

My confusing is, in the document, it seems we need an administrative Privilege.

Actually, i can run the binary and get correct results(cpu, memory), but if the binary is started by a user without administrative Privilege, we will get PerfLib1008 and PerNet 2004 error in event log. Even I the user is already added into the "Performance
Monitor" group.



Thanks.

 

Unselectable and Disappearing Counters in Performance Monitor / Perfmon.exe

Computer: Dell Latitude 7480

Program: Perfmon.exe (32 bit and 64 bit)

OS: Windows 7, Widows 10

I am trying to add counters for USB in Performance Monitor. I want to do something similar to this:

• How to Troubleshoot USB Problems : How to Identify USB Problems Using Performance Monitor, How to Examine USB Hubs - Windows Vista - allcomputers.us
• https://sourcedaddy.com/windows-7/how-to-identify-usb-problems-using-performance-monitor.html

In the screen-shot, I use % total bandwidth used for Interrupt as an example, but this applies to any counter with a grayed out/ unselectable
<All instances> instance.

When add >> is selected it seems to add the counter, but once you select
OK, the counter disappears. It does not show up in Perfmon and does not show up in
Properties -> Data. It's almost as if I never added it.

I have quite a few internal and external USB hubs, and USB devices on this computer, so I'm not sure why there are no instances to select. Maybe that is a clue? Is there something I have to enable first?

There isn't good documentation describing what the grayed out <All instances> means, can anyone please explain? Even if it is alone in the list,
<All instances> is sometimes gray and sometimes not. For me,
Thread counters only have <All instances> but it is not grayed out, while the
USB counters have <All instances> but are grayed out. Also not sure what is different between a blank
Instances of selected object: list and a grayed out out Instances of selected object:
list is.

Additionally, can anyone help me monitor/ enable the USB counters?

Thank you in advance!

 

WMI counter provide incorrect value

We have found a problem with some WMI raw performance data counters on Windows server 2016 and
Windows 2003 SP2. We found that some counters decrement or Timestamp_Sys100NS not change with previous collection, so
each recollection has a lower value that the previous value instead of getting bigger so this renders the calculations done after the recollection useless.
For example, this happens in Win32_PerfRawData_PerfOS_