priority¶

^Priority Level ID ^Priority Level Name ^ |256 |Realtime | |128 |High | |32768 |Above normal | |32 |Normal | |16384 |Below normal | |64 |Low |

Change Priority of Running Process in Command Prompt¶

wmic process where name="mspaint.exe" CALL setpriority "Above normal"

Start Application with a Set Priority in Command Prompt¶

start "" /AboveNormal /B "C:\Windows\System32\mspaint.exe" > out.txt

set the IO priority of a process¶

It looks like the "real" way to set the IO priority of a process is using NtSetInformationProcess with the ProcessIoPriority information class. Unfortunately this API is undocumented, but you can see it in action by attaching a debugger to taskeng.exe and breaking in ExeTask::GetYourPrioritiesStraight.

I believe the PROCESS_INFORMATION_CLASS value for ProcessIoPriority is 33 (0x21), and the priority values are as follows:

• Very Low: 0

• Low: 1

• Normal: 2

• High: 3 or above?