Processor performance counter for sampling the execution frequen

Details Processor performance counter for sampling the execution frequen Processor performance counter for sampling the execution frequen

1997-03-10

2000-08-29

Follansbee, John A.

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

G06F 1134

Patent

active

06112317&

ABSTRACT:
A processor includes an execution pipeline and a retire unit coupled to an end of the execution pipeline. The processor executes instructions of a program. An apparatus for collecting performance data while the instructions are executing includes a register coupled to the retire unit of the processor. Means are provided for incrementing the register whenever an instruction is retired from the execution pipeline. In addition, the apparatus includes means for generating an interrupt to an interrupt handler whenever the register is incremented to a predetermined value.

REFERENCES:
Zagha et al., "Performance Analysis Using the MIPS R10000 Performance Counters," IEEE Computer Society, pp 1-16 Nov. 1996.

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