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5 clearing performance measurement conditions, 6 clearing the performance measurement result, Clearing performance measurement conditions – Renesas R0E530640MCU00 User Manual

Page 146: Clearing the performance measurement result, About the maximum measurement time of performance

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R0E530640MCU00 User’s Manual

5. Debugging Functions

REJ10J1733-0100 Rev.1.00 Apr. 01, 2008
Page 146 of 229



5.10.5 Clearing Performance Measurement Conditions
Select the measurement condition you want to clear in the Performance Analysis window and then choose Set from the context
menu to display the Performance Analysis Conditions dialog box. In the Performance Analysis Conditions dialog box, disable
the condition you want to clear.

Figure 5.71 Performance Analysis Conditions dialog box


5.10.6 Clearing the Performance Measurement Result
Select the section you want to clear in the Performance Analysis window and then choose Clear Data from the context menu.
The measurement result of the selected section will be cleared. To clear all measurement results, choose Clear All Data from
the context menu.


5.10.7 About the Maximum Measurement Time of Performance
(1) Maximum measurement time

The timer used for performance measurement is comprised of a 40-bit counter.
The maximum measurement time varies with the unit of measurement selected.
To select the unit of measurement, use the Measurement Unit list box of the Performance Analysis Conditions dialog box.
The measurable maximum times are listed in the table below.

Table 5.26 Measurable maximum time

No.

Resolution

Measurable maximum time

1

10ns

Approx. 3 hours, 03 minutes, 15 seconds

2

20ns

Approx. 6 hours, 06 minutes, 30 seconds

3

40ns

Approx. 12 hours, 13 minutes, 00 seconds

4

80ns

Approx. 24 hours, 26 minutes, 00 seconds

5

160ns

Approx. 48 hours, 52 minutes, 01 seconds

6 1.6μs

Approx. 488 hours, 40 minutes, 18 seconds


CAUTION
Note that performance measurement produces an error equal to

±1 resolution (when resolution = 20 ns, ±20 ns).


(2) Maximum measurement count

Execution counts are measured using a 32-bit counter. Measurement can be taken of up to a count of 4,294,967,295.

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