Go to process explorer and start Microsoft Powerpoint.Powerpoint does this by creating a NamedObject to declare it’s presence. * The second process exits and the first instance is used to open the file.
Let’s find out how processes that appear to only support one instance at a time often are declaring their presence to themselves. You can search for handle leaks in process explorer by looking at the Green Highlighting color, because these can be identified by a process opening handles and never closing them. * Over time this may exhaust kernel memory * If a handle is not closed, resources cannot be freed Handle leaks occur if a process opens handles to resources and then never closes them. One of the other uses of consulting the handle table is to track handle leaks. doc, partial names are accepted and you can see that WINWORD has open Handles and DLL’s on test.doc Open the Search Handle or DLL Substring dialog and type. The process cannot access the file because it is being used by another process. For instance *.doc for word documents of you happen to have one open.Įxample! Open the command prompt and try to delete a file in the temp folder called the text.doc with the file opened by WinWord: Enter the name of the Object that the handle refer’s to. Note! To search through the Handle tables you can select the Process Explorer’s Search > Handle or DLL substring. = Viewing Open Handles with Process Explorer =. To open the handle table for a process in process explorer select the lower pane and click the handle view.As I understand this is wrong because clearly there is a connection (as I showed above), and this connection actually explains the difference. Other answers mentioned that there is no connection between CPU usage and CPU speed.this is fine but it does not explain the different values of Processes and Details tabs of the same Task Manager. Some other answers explained that Process Explorer and Task Manager have different polling algorithms.It is not relevant here as I see processes from all users. Some of them explained that there might be processes from other users.I've found similar questions in this site, but their answers seem incorrect or irrelevant to my question: In fact some people gave contradicting explanations to this difference.
It all adds up to be pretty simple: Process Explorer shows the usage of the cpu without any scale, Task Manager and Resource Monitor show it with a scale of the current CPU speed (except for the Details tab for some reason). Same as in Task Manager Performance tab.180% of 10.28 is 18.5 which is pretty close.It seems like the 'real' CPU usage without any scale.180% of 8.34 is 15, which is not exactly 16.6 but pretty close.Task Manager's Process tab: python.exe 16.6%.180% of the base speed is approximately 3.98GHz, which was my CPU speed during the test.Same as previous calculation, but task manager rounds the result to 8%.My system has 12 logical cores so 100/12 is approximately 8.34. My python program should exhaust a single core.I am using 12 logical processors with base speed of 2.21GHz, so the results are: Now let's do some math and explain these values. Task Manager's Performance tab: CPU utilization 19%.Task Manager's Process tab: python.exe 16.8%.Resource Monitor: Maximum frequency 180%.Task Manager's Details tab: python.exe 8%.This should exhaust the core it is running in, as it does not use IO at all so there is no spare time for the core to idle. To test that theory I created a simple infinite loop in python which does not use IO: while True: pass. I have a guess that the difference is because some performance monitors include the CPU speed in their calculations while others don't. I want to understand why, so I tried doing some research. Moreover, 'Processes' and 'Details' tabs in the same Task Manager indicate different CPU utilization values. When I open Task Manager and Process Explorer I can see they present different CPU utilization values.
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