Electrical computers and digital processing systems: memory – Storage accessing and control – Shared memory area
Patent
1997-10-22
1999-04-06
Harrell, Robert B.
Electrical computers and digital processing systems: memory
Storage accessing and control
Shared memory area
711143, 711147, G06F 1200
Patent
active
058931597
ABSTRACT:
A method is disclosed for operating a software-managed cache memory (30), and includes steps of: (a) registering with an operating system (12A), for at least one thread of a plurality of threads, a memory allocation function; in response to the execution of a first thread being halted, (b) determining if a next thread to be executed has registered a request to be allocated all or a portion of the memory; and (c) swapping-out the memory allocated to the first thread if the first thread has previously registered a memory callback function and if the next thread has made a request to be allocated an amount of memory that exceeds an amount that is not already allocated. If the first thread has not previously registered a memory callback function, or if the next thread has made a request to be allocated an amount of memory that exceeds an amount that is available to be allocated, the method instead allocates a portion of the memory to the second thread that does not overlap a portion already allocated to the first thread, and does not swap-out the portion of the memory that is allocated to the first thread.
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Harrell Robert B.
International Business Machines - Corporation
Ovedovitz David M.
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