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What happens if a process can not be killed?
Sometime process exists and cannot be killed due to: 1 being zombie. I.e. process which parent did not read the exit status. Such process does not consume any resources except… 2 erroneous uninterruptible sleep. It should not happen but with a combination of buggy kernel code and/or buggy hardware… More
Can a process with 8% CPU be stopped?
Using your original calculation, a process using 8% CPU would be reported as 16% and thus be incorrectly stopped. The Win32_ComputerSystem version will return all logical processors across all physical CPU’s, so multi socketed servers would also be calculated correctly.
What happens if a system call kills a process?
So if (due to a bug or misdesign) a system call blocks indefinitely, there may effectively be no way to kill the process. (But the process will be killed if it ever completes the system call.) A process blocked in a system call is in uninterruptible sleep.
Why does PowerShell stop when CPU usage reaches 8%?
For example, on my machine with 6 Physical Cores, I have 12 logical processors due to HyperThreading. Using your original calculation, a process using 8% CPU would be reported as 16% and thus be incorrectly stopped.
Is there a way to ignore the SIGKILL signal?
If you send SIGKILL it will not be able to ignore it (and neither catch it to do cleanups). Try: If kill is invoked without any parameter, it sends the signal number 15 ( SIGTERM ). This signal can be ignored by the process.
What happens if kill is invoked without a parameter?
If kill is invoked without any parameter, it sends the signal number 15 ( SIGTERM ). This signal can be ignored by the process. This signal notifies the process to clean his things up and then end correctly by himself. That’s the nice way.
Can a process be killed while waiting for I / O?
A process comes into this state everytime it waits for I/O (normally not very long). So, if a process waits for I/O (on a defect harddisk for example) and it is not programmed properly (with a timeout), then you simply cannot kill the process.