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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[d230358] | 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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[a362c16] | 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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[d230358] | 42 | */
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