cpu_idle(9) [netbsd man page]

CPU_IDLE(9)						   BSD Kernel Developer's Manual					       CPU_IDLE(9)

NAME

     cpu_idle -- machine-dependent processor idling interface

SYNOPSIS

     #include <sys/cpu.h>

     void
     cpu_idle(void);

DESCRIPTION

     cpu_idle() is called by machine-independent code when the processor has nothing to do.  It can be used to conserve the processor power, for
     example.

     cpu_idle() returns immediately if cpu_need_resched() has been called for the processor after the last call of cpu_idle() or cpu_did_resched()
     on the processor.	cpu_idle() returns as soon as possible when cpu_need_resched() is called for the processor.  Otherwise, it returns when-
     ever it likes.

     cpu_idle() is called at IPL_NONE, without any locks held.

EXAMPLES

     The simplest (and, in some cases, the best) implementation of cpu_idle() is the following.

	     void
	     cpu_idle(void)
	     {
		     /* nothing */
	     }

SEE ALSO

     cpu_need_resched(9), cpu_switchto(9), intro(9), spl(9)

BSD
								  April 20, 2007							       BSD

pset_info(1)						      General Commands Manual						      pset_info(1)

NAME

       pset_info - Displays processor set information

SYNOPSIS

       /usr/sbin/pset_info

DESCRIPTION

       The pset_info command displays information about processor sets and the processors that are assigned to each set.  Note that a stopped pro-
       cessor is not a member of any processor set, and its processor set identification number is specified as -1. Also, depending on the machine
       architecture, processors may not be numbered consecutively.  That is, a four-processor system may not have a processor with the number 3.

NOTES

       If  a  processor or processor set is queried while it is in transition (for example, processor set destruction or processor assignment), an
       error may be returned from the kernel.  Running the command a second time will result in normal behavior.

EXAMPLES

       The following is an example of the output of the pset_info command:

       number of processor sets on system = 2

       pset_id	# cpus	 # pids   # threads  load_av	created
	 0	   1	    26	     63        0.90	09/21/1994 17:48:42
	 6	   1	    1	     4	       0.21	09/21/1994 23:33:37

       total number of processors on system = 3

       cpu #	running  boot_cpu pset_id  assigned_to_pset
	0	   1	     1	     0	   09/21/1994 17:48:42
	1	   1	     0	     6	   09/21/1994 23:34:06
	2	   0	     0	      -1   09/21/1994 17:48:42

SEE ALSO

       Commands:  pset_assign_cpu(1), pset_assign_pid(1), pset_create(1), psradm(8)

       Files:  processor_sets(4)

																      pset_info(1)