HP 64783A, Руководство пользователя

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Understanding activity measurements
Activity measurements are measurements of the number of accesses (reads or
writes) within an address range. The SPMT shows you the percentage of analyzer
trace states that are in the specified address range, as well as the percentage of time
taken by those states. Two types of activity are measured: memory activity, and
program activity.
Memory activity is all activity that occurs within the address range.
Program activity is the activity caused by instruction execution in the address
range. Program activity includes opcode fetches and the cycles that result from the
execution of those instructions (such as reads, writes, and stack pushes).
For example, suppose an address range being measured for activity contains an
opcode that causes a stack push, which results in multiple write operations to the
stack area (outside the range). The memory activity measurement will count only
the stack push opcode cycle. However, the program activity measurement will
count the stack push opcode cycle and the write operations to the stack.
By comparing the program activity and the memory activity in an address range,
you can get an idea of how much activity in other areas is caused by the code being
measured. An activity measurement report of the code (prog), data, and stack
sections of a program is shown in the next figure.
Chapter 7: Making Software Performance Measurements
Understanding activity measurements
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