Changing process CPU affinity via Image File Execution Options ?
I'm in need to restrict a process in windows to one CPU core. I need to do that
I've found out that there's some fun possible by manipulating the registry at HKLM\SOFTWARE\Microsoft\Wi
Now for the questions:
- right at startup,
- as a persistent measure, and
- independent of the way it is started.
I've found out that there's some fun possible by manipulating the registry at HKLM\SOFTWARE\Microsoft\Wi
- malware related uses of (IFEO\whatever.exe\ -> Debugger)
- brute force replacing Notepad.exe with Notepad++ (IFEO\Notepad.exe\ -> Debugger (again ...)), and
- permanently forcing a given priority level (IFEO\whatever.exe\PerfOpt
ions -> CpuPriorityClass)
Now for the questions:
- Is there any way to set CpuAffinity thru this way ?
- Is there any documentation of the (presumed numerous) options available for the IFEO registry path inhabitants ?
ASKER
Additonal note: The demand is for third party processes I can't modify.
Solution:
That works like a charm with the only drawback of an additional (low ressource demand) process lingering around until the taget process ends.
Solution:
- I've built a tiny .NET CLI process that takes a CPU mask and the real command line as arguments.
- Without arguments it just informs about the allowed values of the CPU mask.
- Right after start with arguments it restricts itself to the given CPU mask
(key point is the manipulation of Process.GetCurrentProcess().ProcessorAffinity) - After that it spawns the target process as child process - which inherits the CPU restrictions - and wents to sleep until that child process ends.
That works like a charm with the only drawback of an additional (low ressource demand) process lingering around until the taget process ends.
ASKER CERTIFIED SOLUTION
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ASKER
I've used the tool "Process Monitor" from the sysinternals suite to log access to the IFEO tree members, and found some more values in HKLM\SOFTWARE\Microsoft\Wi
I suppose that list not to be comprehensive .... but I'd like to have as much information as possible about these options ... and their hidden brothers and sisters. I presume the strings of them are all in ntoskrnl.exe, but yet have to check that over ...