Apparatus for measuring program execution

Details Apparatus for measuring program execution Apparatus for measuring program execution

1982-04-16

1985-04-16

Springborn, Harvey E.

Boots, shoes, and leggings

G06F 1128, G06F 906

Patent

active

045119619

ABSTRACT:
A measuring apparatus for measuring the time of execution of instructions or the number of cycles that addresses are within a selected address range of a memory. The measurement includes a measurement of any common subroutines that have been called by the instructions within the selected range. The measuring apparatus includes range circuitry connected to the address bus of the memory that detects instruction addresses within the selected range and instruction addresses within a common range having the common subroutines. The measuring apparatus further includes link logic for controlling a counter to both measure the instructions within the selected range and measure instructions within the common range when they immediately follow the selected range on the address bus. In the preferred embodiment, the memory is organized in ranges so that the first range begins at the first memory location in the memory and the last range ends at the last memory location in the memory. Any one of the ranges can be designated as a common range. The counter circuitry includes a plurality of counters, one associated with each of the ranges. Each counter can measure instruction addresses within its associated range and instruction addresses within a common range that immediately follow its associated range.

REFERENCES:
patent: 4053947 (1977-10-01), Calsson et al.
patent: 4084154 (1978-04-01), Panigrahi
patent: 4192130 (1980-05-01), Takeuchi
patent: 4302820 (1981-11-01), Struger et al.
patent: 4382179 (1983-05-01), Penton

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