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ST7 AND ST9 PERFORMANCE BENCHMARKING

6 COMPLETE NUMERICAL RESULTS

Here are the tables with the complete numerical results.

6.1 CORE COMPUTING PERFORMANCE

The first two tables (Table 5 and Table 6) concern execution time with the values measured

in milliseconds and the ratios calculated with ST9+ MCU as reference. The next two tables

(Table 7 and Table 8) concern code size with the values measured in bytes and the ratios

calculated with ST9+ MCU as reference. The last two tables (Table 9 and Table 10) present

global execution time ratios and global code size ratios with reduced and full set of tests.

Refer to section 9 for measurement proceeding and calculation description.

Notes: The reduced set of tests includes string, char, bubble(10 words), blkmov(64 bytes),

convert, 16mul, shright, bitrst tests. They are in boldface characters.

Numbers with parenthesis have been judged out of range and have not been taken

into account. In fact, it means that this specific test was absolutely unadapted to this

specific MCU. Only some tests, which are not include in the reduced set, are

concerned.

6.2 CORE INTERRUPT PROCESSING PERFORMANCE

Table 11 concerns execution time with the values measured in microseconds, showing

interrupt latency & return time, the total time, and the ratios calculated with ST9+ MCU as

reference. Table 12 concerns code size with the values measured in bytes and the ratios

calculated with ST9+ MCU as reference.

The execution time has only been calculated theoretically with the assembly code, like

computing performance theoretical execution time (see <Italic>9.1.1 Execution time

measure<Italic end>). The result is the sum of the interrupt latency (execution time of the

longest instruction and interrupt entry time) and the execution time of the interrupt service

routine. The code size has been calculated with the assembly code.

Legend:

▲

x.xx

best results

▼

x.xx

worst results

Legend:

▲

x.xx

best results

▼

x.xx

worst results

AN910 Datasheet(PDF) 21 Page - STMicroelectronics