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公开(公告)号：US20210373975A1
公开(公告)日：2021-12-02
申请号：US17029935
申请日：2020-09-23
Applicant: ADVANCED MICRO DEVICES, INC.
Inventor： Alexandru DUTU , Matthew David SINCLAIR , Bradford BECKMANN , David A. WOOD
Abstract: A processing system monitors and synchronizes parallel execution of workgroups (WGs). One or more of the WGs perform (e.g., periodically or in response to a trigger such as an indication of oversubscription) a waiting atomic instruction. In response to a comparison between an atomic value produced as a result of the waiting atomic instruction and an expected value, WGs that fail to produce a correct atomic value are identified as being in a waiting state (e.g., waiting for a synchronization variable). Execution of WGs in the waiting state is prevented (e.g., by a context switch) until corresponding synchronization variables are released.
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公开(公告)号：US20200004586A1
公开(公告)日：2020-01-02
申请号：US16024244
申请日：2018-06-29
Applicant: ADVANCED MICRO DEVICES, INC.
Inventor： Alexandru DUTU , Matthew David SINCLAIR , Bradford BECKMANN , David A. WOOD
Abstract: A first workgroup is preempted in response to threads in the first workgroup executing a first wait instruction including a first value of a signal and a first hint indicating a type of modification for the signal. The first workgroup is scheduled for execution on a processor core based on a first context after preemption in response to the signal having the first value. A second workgroup is scheduled for execution on the processor core based on a second context in response to preempting the first workgroup and in response to the signal having a second value. A third context it is prefetched into registers of the processor core based on the first hint and the second value. The first context is stored in a first portion of the registers and the second context is prefetched into a second portion of the registers prior to preempting the first workgroup.
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