Using Resource Groups

A resource group provides an alternate way to view the resources in a system. Resources are grouped based on the underlying physical relationships between processor cores, memory, and I/O buses. Different platforms, and even different platform configurations within the same server family, such as SPARC T5-2 and SPARC T5-8, can have different resource groups that reflect the differences in the hardware. Use the ldm list-rsrc-group command to view resource group information.

The membership of resource groups is statically defined by the hardware configuration. You can use the ldm remove-core and ldm remove-memory commands to operate on resources from a particular resource group.

• The remove-core subcommand specifies the number of CPU cores to remove from a domain. When you specify a resource group by using the -g option, the cores that are selected for removal all come from that resource group.

• The remove-memory subcommand removes the specified amount of memory from a logical domain. When you specify a resource group by using the -g option, the memory that is selected for removal all comes from that resource group.

For information about these commands, see the ldm(8) man page.

For examples, see Listing Resource Group Information.