MISSING: Multithreading Facility

[Fish-Git]

Multithreading Facility   (March, 2015)

The multithreading (MT) facility may be available on models implementing z/Architecture. The facility provides the means by which more efficient utilization of a configuration's resources may be realized. The facility introduces the architectural concept of a core, which, when multithreading is enabled, comprises a group of CPUs (sometimes called threads). The CPU comprises all of the architected resources available to the program such as the program-status word, registers, timing facilities, and so forth. When the multithreading facility is not enabled, a core consists of a single CPU.

When the multithreading facility is enabled, the CPUs within a core may share certain hardware resources such as execution units or caches. When one CPU in a core is waiting for other hardware resources (typically, while waiting for a storage access), other CPUs in the core can utilize the shared resources in the core rather than have them remain idle.

[Fish-Git]

Moved to combined issue #77 "MISSING Facilities support".