The sun ultra spark processor has multiple register sets what else must happen if the new context is in memory rather than in a register set and all the register sets are in use?

The CPU current-register-set pointer is changed to point to the

set containing the new context,which takes very little time. If the context

is in memory, one of the contexts in a register set must be chosen and be

moved to memory, and the new context must be loaded from memory

into the set. This process takes a little more time than on systems with

one set of registers, depending on how a replacement victim is selected