公开(公告)号：US11630789B2

公开(公告)日：2023-04-18

申请号：US17246311

申请日：2021-04-30

Applicant: Apple Inc.

Inventor： Jeffrey E. Gonion ,  Charles E. Tucker ,  Tal Kuzi ,  Richard F. Russo ,  Mridul Agarwal ,  Christopher M. Tsay ,  Gideon N. Levinsky ,  Shih-Chieh Wen ,  Lior Zimet

IPC: G06F13/24 ,  G06F1/26

Abstract: An interrupt delivery mechanism for a system includes and interrupt controller and a plurality of cluster interrupt controllers coupled to respective pluralities of processors in an embodiment. The interrupt controller may serially transmit an interrupt request to respective cluster interrupt controllers, which may acknowledge (Ack) or non-acknowledge (Nack) the interrupt based on attempting to deliver the interrupt to processors to which the cluster interrupt controller is coupled. In a soft iteration, the cluster interrupt controller may attempt to deliver the interrupt to processors that are powered on, without attempting to power on processors that are powered off. If the soft iteration does not result in an Ack response from one of the plurality of cluster interrupt controllers, a hard iteration may be performed in which the powered-off processors may be powered on.

公开(公告)号：US11422821B1

公开(公告)日：2022-08-23

申请号：US16120675

申请日：2018-09-04

Applicant: Apple Inc.

Inventor： James N. Hardage, Jr. ,  Christopher M. Tsay ,  Mahesh K. Reddy

IPC: G06F9/38 ,  G06F9/30

Abstract: A system and method for efficiently handling instruction execution ordering. In various embodiments, a processor includes multiple execution lanes, each executing instructions of a particular type, which are not executed by one or more of the other execution lanes. The instruction queue includes one queue for each particular execution lane. Control logic identifies a current youngest age used in allocated entries of the multiple queues, and determines a starting age based on the identified current youngest age and the number of instructions to be issued. Beginning with the determined starting age, ages (in program order) are assigned to a group of instructions being allocated in the multiple queues. Ages of entries in the multiple queues are updated for instructions not being issued based on the number of instructions being issued. Instructions being issued have age differences between them below a threshold.