October 2017
Intermediate to advanced
354 pages
9h 28m
English
Content preview from Mastering Linux Kernel Development
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Scheduler related system calls
Linux provides an entire family of system calls that manage various scheduler parameters, policies, and priorities and retrieve a multitude of scheduling-related information for the calling threads. It also enables threads to yield CPU explicitly:
nice(int inc)
nice() takes an int parameter and adds it to the nice value of the calling thread. On success, it returns the new nice value of the thread. Nice values are within the range 19 (lowest priority) to -20 (highest priority). Nice values can be incremented only within this range:
getpriority(int which, id_t who)
This returns the nice value of the thread, group, user, or set of threads of a specified user as indicated by its parameters. It returns the highest ...