Table Of Contents
RT Set CPU Pools (Set Pool Sizes) (G Dataflow)
Sets the number of CPUs in the CPU pools for automatic load balancing.
This node 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.
system pool
Number of CPUs to assign to the System pool.
This node returns an error if you specify 0 in this input or if the values you specify for system pool and timed structures pool add up to more than the number of CPUs available in the real-time operating system (RTOS).
If you set both system pool and timed structures pool to -1, this node assigns all CPUs in the RTOS to both pools. If you set either system pool or timed structures pool to -1, this node assigns all remaining CPUs to that pool.
Default: -1
timed structures pool
Number of CPUs to assign to the Timed Structures pool.
This node returns an error if you specify 0 in this input or if the values you specify for system pool and timed structures pool add up to more than the number of CPUs available in the real-time operating system (RTOS).
If you set both system pool and timed structures pool to -1, this node assigns all CPUs in the RTOS to both pools. If you set either system pool or timed structures pool to -1, this node assigns all remaining CPUs to that pool.
Default: -1
error in
Error conditions that occur before this node runs.
The node responds to this input according to standard error behavior.
Standard Error Behavior
Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.
Default: No error
assigned CPU pools
Pool assignment of each CPU.
| Name | Description |
|---|---|
| System and 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-Loop threads. |
| Timed Structures | The CPU is assigned to the Timed Structures pool for automatic load balancing of Timed Loop threads. |
| Reserved | The CPU is not assigned to a pool. The CPU is reserved for Timed Loops configured for manual processor assignment. |
error out
Error information.
The node produces this output according to standard error behavior.
Standard Error Behavior
Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.
Maximizing CPU Utilization
To maximize processor utilization, you can adjust the number of CPUs to assign to each pool based on the estimation of the proportion of total processing time dedicated to Timed Loops versus system threads. You can estimate the processing load distribution using the RT Get CPU Loads node.
Where This Node Can Run:
Desktop OS: Windows
FPGA: Not supported
Web Server: Not supported in VIs that run in a web application