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The available Instruction Level Parallelism in Java bytecode (Java-ILP) is not readily exploitable using traditional in-order or out-of-order issue mechanisms due to dependencies involving stack operands. The sequentialization due to stack dependency can be overcome by identifying bytecode traces, which are sequences of bytecode instructions that when executed leave the operand stack in the same state as it was at the beginning of the sequence. Instructions from different bytecode traces have no stack-operand dependency and hence can be executed in parallel on multiple operand stacks.
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