Printf("PRIO_DARWIN_THREAD %d PRIO_DARWIN_PROCESS %d PRIO_DARWIN_BG %d\n", PRIO_ DARWIN _PROCESS, are platform-specific constants that are not exposed by Python, so I wrote a brief C program to extract them: #include Any thread or process can set itself into background state. The getpriority() call returns 0 when current thread or process is not in background state or 1 when the current thread is in background state. Any previously opened sockets are not affected. When a thread or process is in a background state the scheduling priority is set to the lowest value, disk IO is throttled (with behavior similar to using setiopolicy_np(3) to set a throttleable policy), and network IO is throttled for any sockets opened after going into background state. prio is either 0 (to remove current thread from background status) or PRIO_DARWIN_BG (to set current thread into background state). Only a value of zero (the current thread or process) is supported for who when setting or getting background state. Note this language from man setpriority on macOS, all emphasis mine:Īdditionally, the current thread or process can be placed in a background state by specifying PRIO_DARWIN_THREAD or PRIO_DARWIN_PROCESS for which. The specifics of the parameters you need to pass are probably specific to your particular application though it looks like you've got a bunch of processes and you want to run at a high priority, so read the relevant documentation and see if adding to your script will enable you to re-elevate your own task priority from the background. taskpolicy is a front-end to the setpriority and getpriority APIs, which, luckily, are exposed to Python directly, so you should be able to import os os.setpriority(.). Cron itself is running on efficiency cores because it's a background task, and your Python script inherits its priorities. I believe this is the inverse of this question.
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