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71 lines
2.0 KiB
C
71 lines
2.0 KiB
C
/*
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* Copyright (C) 2017,2018 Freie Universität Berlin
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @defgroup sys_benchmark Benchmark
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* @ingroup sys
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* @brief Framework for running simple runtime benchmarks
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* @{
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*
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* @file
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* @brief Interface for running simple benchmarks
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*
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* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
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*/
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#ifndef BENCHMARK_H
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#define BENCHMARK_H
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#include <stdint.h>
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#include "irq.h"
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#include "xtimer.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief Measure the runtime of a given function call
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*
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* As we are doing a time sensitive measurement here, there is no way around
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* using a preprocessor function, as going with a function pointer or similar
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* would influence the measured runtime...
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*
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* @param[in] name name for labeling the output
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* @param[in] runs number of times to run @p func
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* @param[in] func function call to benchmark
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*/
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#define BENCHMARK_FUNC(name, runs, func) \
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{ \
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unsigned _benchmark_irqstate = irq_disable(); \
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uint32_t _benchmark_time = xtimer_now_usec(); \
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for (unsigned long i = 0; i < runs; i++) { \
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func; \
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} \
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_benchmark_time = (xtimer_now_usec() - _benchmark_time);\
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irq_restore(_benchmark_irqstate); \
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benchmark_print_time(_benchmark_time, runs, name); \
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}
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/**
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* @brief Output the given time as well as the time per run on STDIO
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*
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* @param[in] time overall runtime in us
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* @param[in] runs number of runs
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* @param[in] name name to label the output
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*/
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void benchmark_print_time(uint32_t time, unsigned long runs, const char *name);
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#ifdef __cplusplus
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}
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#endif
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#endif /* BENCHMARK_H */
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/** @} */
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