Pipelined processor with fork, join, and start instructions using tokens to indicate the next instruction for each of multiple threads of execution
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United States of America Patent
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-
Mar 12, 1996
Issued Date -
N/A
app pub date -
Oct 3, 1994
filing date -
May 26, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A multithreaded parallel data processing system has at least one processing element for processing multiple threads of computation. Threads are described by thread descriptors or tokens which are stored while waiting to be processed in a thread descriptor storage. Thread descriptors are comprised of an instruction pointer and a frame pointer. The instruction pointer points to the next instruction to be executed, and the frame pointer points to a frame of memory locations that the next instruction will operate on. Included within the instruction set of the at least one processing element is a fork instruction generates two thread descriptors which are added to the current thread descriptors, a start instruction on a first processor sends a message containing a thread descriptor to a second processor, and a join instruction joins two threads by producing a single thread descriptor when both of the joining threads have reached a join instruction.
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