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IBM Journal of Research and Development  
Volume 38, Number 5, Page 545 (1994)
POWER2 and PowerPC architecture
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The POWER2 performance monitor

by E. H. Welbon, C. C. Chan-Nui, D. J. Shippy, D. A. Hicks
The POWER2™ performance monitor ("monitor") provides the detailed hardware measurements necessary to study the hardware/software interactions of workloads executed by the POWER2 processor. The monitor is integrated into the processor and is fully software accessible. Of interest is the ability of this monitor to selectively measure specific software processes with minimal perturbation of those processes.
Related Subjects: Computer architecture; Computer organization and design; Performance analysis; Reduced-instruction-set computers (RISC)