ALEXANDRIA, Va., June 16 -- United States Patent no. 12,306,789, issued on May 20, was assigned to Apple Inc. (Cupertino, Calif.).

"Performance islands for CPU clusters" was invented by Bryan R. Hinch (Campbell, Calif.), John G. Dorsey (San Francisco), Ronit Banerjee (Cupertino, Calif.), Kushal Dalmia (Santa Clara, Calif.), Daniel A. Chimene (San Francisco) and Jaidev P. Patwardhan (Mountain View, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Embodiments include an asymmetric multiprocessing (AMP) system having two or more central processing unit (CPU) clusters of a first core type and a CPU cluster of a second core type. Some embodiments include determining a control effort for an active thread grou...