06223208 is referenced by 90 patents and cites 10 patents.

In a computer system and a processor which has the capability to do multithreaded processor, the computer system and processor use idle register/storage functional units within the processor core to transfer the state of a thread out of the processor to memory or from memory to the processor core. The register/storage functional units are interrogated dynamically so that this transfer occurs only when the register/storage functional units are idle and not being used for normal instructions. Thus, a state may be transferred in whole if there are many cycles when the register/storage functional unit is idle or it may be transferred in part if there an insufficient number of no-op instructions for the entire state. A context switch unit in the processor then has appropriate registers and logic control to keep track of the state of the thread that is being “idly” transferred and then transfer the remaining registers when a register/storage functional is available or “idle.”

Title
Moving data in and out of processor units using idle register/storage functional units
Application Number
8/943260
Publication Number
6223208 (B1)
Application Date
October 3, 1997
Publication Date
April 24, 2001
Inventor
John Christopher Willis
Rochester
MN, US
David A Luick
Rochester
MN, US
Kenneth J Kiefer
Rochester
MN, US
Agent
Karuna Ojanen
US
Assignee
International Business Machines Corporation
NY, US
IPC
G06F 9/00
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