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NetBSD 6.1.5 - man page for schedctl (netbsd section 8)

SCHEDCTL(8)			   BSD System Manager's Manual			      SCHEDCTL(8)

NAME
     schedctl -- control scheduling of processes and threads

SYNOPSIS
     schedctl [-A cpus] [-C class] [-P pri] [-t lid] -p pid | command

DESCRIPTION
     The schedctl command can be used to control the scheduling of processes and threads.  It
     also returns information about the current scheduling parameters of the process or thread.
     Only the super-user may change the scheduling parameters.	schedctl can also be used to
     start a new command using the specified parameters.

     Available options:

     -A cpus	Set of the processors on which process or thread should run, that is, affinity.
		Processors are defined as numbers (starting from zero) and separated by commas.
		A value of -1 is used to unset the affinity.

     -C class	Scheduling class (policy), one of:

		SCHED_OTHER   Time-sharing (TS) scheduling policy.  The default policy in NetBSD.

		SCHED_FIFO    First in, first out (FIFO) scheduling policy.

		SCHED_RR      Round-robin scheduling policy.

     -P pri	Priority for the process or thread.  Value should be in the range from
		SCHED_PRI_MIN (0) to SCHED_PRI_MAX (63).  Setting of priority for the process or
		thread running at SCHED_OTHER policy is not allowed.

     -p pid	The target process which will be affected.  If the process has more than one
		thread, all of them will be affected.

		If -p is not given, a command to execute must be given on the command line.

     -t lid	Thread in the specified process.  If specified, only this thread in the process
		will be affected.  May only be specified if -p is also given.

EXAMPLES
     Show scheduling information about the process whose ID is ``123'':

	   # schedctl -p 123

     Set the affinity to CPU 0 and CPU 1, policy to SCHED_RR, and priority to 63 for thread whose
     ID is ``1'' in process whose ID is ``123'':

	   # schedctl -p 123 -t 1 -A 0,1 -C SCHED_RR -P 63

     Run the top(1) command with real-time priority:

	   # schedctl -C SCHED_FIFO top

SEE ALSO
     nice(1), getpriority(2), setpriority(2), psrset(8), renice(8)

HISTORY
     The schedctl command first appeared in NetBSD 5.0.

BSD					  March 21, 2011				      BSD


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