RT Set CPU Pool Sizes VI

Owning Palette: RT SMP CPU Utilities VIs

Requires: RT Module

Sets the number of CPUs in the CPU pools available for automatic load balancing. You can use this VI to define the System pool and the Timed Structures pool by specifying the number of CPUs you want each pool to contain.

This VI creates the System and Timed Structures pools as adjacent pools of contiguous CPUs. The System pool begins at CPU 0 and the Timed Structures pool begins where the System pool ends. For example, on an eight-CPU system, if you wire a value of 3 to both the system pool and timed structures pool controls, this VI assigns CPUs 0-2 to the System pool, CPUs 3-5 to the Timed Structures Pool, and leaves CPUs 6-7 reserved for use by Timed Structures configured for manual CPU assignment.

Note  You cannot use this VI to create empty pools or partially overlapping pools. This VI returns an error if you specify a pool size of 0 or if the pool values you specify add up to more than the number of CPUs available in the system.

Details  

	system pool specifies the number of CPUs to assign to the System pool.
	timed structures pool specifies the number of CPUs to assign to the Timed Structures pool.
	error in (no error) describes error conditions that occur before this node runs. This input provides standard error in functionality.
	assigned CPU pools returns the CPU pool assignments. Reserved The CPU is not assigned to a pool. The CPU is reserved for Timed Structures configured for manual processor assignment. System & Timed Structures The CPU is assigned to both the System pool and the Timed Structures pool for automatic load balancing of all threads that are not manually assigned to a particular CPU. System The CPU is assigned to the System pool for automatic load balancing of non-timed-structure threads. Timed Structures The CPU is assigned to the Timed Structures pool for automatic load balancing of timed structure threads.
	error out contains error information. This output provides standard error out functionality.

RT Set CPU Pool Sizes Details

The default pool size of -1 sets the size of the pool automatically. If you specify a value of -1 for both pools, this VI creates the default pool configuration in which both pools contain every CPU in the system. If you specify a size of -1 for only one pool, this VI assigns all remaining CPUs to that pool.

Refer to the Specifying the Set of CPUs Available for Automatic Load Balancing topic for more information about CPU pools.