Patent ID: 11868823
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 12:
13. A method of operating an interconnected computer system having a Peripheral Component Interconnect Express (PCIe) fabric, a first computer system communicatively coupled to the PCIe fabric, a second computer system communicatively coupled to the PCIe fabric, and a shared single-access hardware resource coupled to the PCIe fabric and remote from both the first computer system and the second computer system, the method comprising:
the first computer system storing in a first local memory:
a first flag indicating a desire of the first computer system to access the shared single-access hardware resource; and
a turn variable indicating which of the first computer system and the second computer system has access to the shared single-access hardware resource;
the second computer system storing in a second local memory a second flag indicating a desire of the second computer system to access the shared single-access hardware resource, wherein the turn variable is separated from the second computer system by the PCIe fabric;
based upon a state of the first flag indicating the desire of the first computer system to access the shared single-access hardware resource and the turn variable, the first computer system accessing the shared single-access hardware resource; and
based upon a state of the second flag indicating the desire of the second computer system to access the shared single-access hardware resource and the turn variable, the second computer system accessing the shared single-access hardware resource.