Patent
1997-11-26
1999-07-13
Maung, Zarni
39580023, G06F 900
Patent
active
059238720
ABSTRACT:
An apparatus is provided for sampling values of operands of instructions in a processor pipeline of a system, the pipeline having a plurality of processing stages. Instructions are fetched into a first stage of the pipeline. Any one of the fetched instructions are identified as a particular selected instruction. Values of results computed during the processing of the particular selected instruction are recorded in a sampling record along with state information identifying the particular selected instruction. Software is informed whenever the particular selected instruction leaves the pipeline to read the recorded values and state information.
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Chrysos George Z.
Dean Jeffrey
Hicks James E.
Waldspurger Carl A.
Weihl William E.
Digital Equipment Corporation
Maung Zarni
Ovedovitz David M.
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