Method and apparatus for implementing atomicity of memory operations in dynamic multi-streaming processors
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United States of America Patent
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Jan 19, 2010
Grant Date -
Dec 20, 2007
app pub date -
Feb 20, 2007
filing date -
Dec 16, 1998
priority date (Note) -
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Abstract
A multi-streaming processor has a plurality of streams for streaming one or more instruction threads, a set of functional resources for processing instructions from streams, and a lock mechanism for locking selected memory locations shared by streams of the processor, the hardware-lock mechanism operating to set a lock when an atomic memory sequence is started and to clear a lock when an atomic memory sequence is completed. In preferred embodiments the lock mechanism comprises one or more storage locations associated with each stream of the processor, each storage location enabled to store a memory address a lock bit, and a stall bit. Methods for practicing the invention using the apparatus are also taught.
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