lfn
serial
ticket/834-toolchain-update
topic/msim-upgrade
topic/simplify-dev-export
Last change
on this file since a362c16 was a362c16, checked in by Vojtech Horky <vojtech.horky@…>, 6 years ago |
perf: a bit of documentation
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1 | /** @addtogroup perf perf
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2 | * @brief User space performance measuring tool
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3 | * @ingroup apps
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4 | *
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5 | * @details
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6 | *
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7 | * To add a new benchmark, you need to implement the actual benchmarking
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8 | * code and register it.
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9 | *
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10 | * Registration is done by adding
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11 | * <code>extern benchmark_t bench_YOUR_NAME</code> reference to benchlist.h
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12 | * and by adding it to the array in benchlist.c.
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13 | *
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14 | * The actual benchmark should reside in a separate file (see malloc/malloc1.c
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15 | * for example) and has to (at least) declare one function (the actual
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16 | * benchmark) and fill-in the benchmark_t structure.
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17 | *
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18 | * Fill-in the name of the benchmark, its description and a reference to the
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19 | * benchmark function to the benchmark_t.
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20 | *
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21 | * The benchmarking function has to accept for arguments:
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22 | * @li stopwatch_t: store the measured data there
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23 | * @li uint64_t: size of the workload - typically number of inner loops in
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24 | * your benchmark (used to self-calibrate benchmark size)
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25 | * @li char * and size_t giving you access to buffer for storing error message
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26 | * if the benchmark fails (return false from the function itself then)
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27 | *
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28 | * Typically, the structure of the function is following:
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29 | * @code{c}
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30 | * static bool runner(stopwatch_t *stopwatch, uint64_t size,
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31 | * char *error, size_t error_size)
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32 | * {
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33 | * stopwatch_start(stopwatch);
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34 | * for (uint64_t i = 0; i < size; i++) {
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35 | * // measured action
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36 | * }
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37 | * stopwatch_stop(stopwatch);
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38 | *
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39 | * return true;
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40 | * }
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41 | * @endcode
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42 | */
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