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60 lines
1.2 KiB
C
60 lines
1.2 KiB
C
/*
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* Copyright (C) 2019 Kaspar Schleiser <kaspar@schleiser.de>
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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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* @ingroup test
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* @{
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*
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* @file
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* @brief ztimer overhead test application
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*
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* @author Kaspar Schleiser <kaspar@schleiser.de>
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*
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* @}
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*/
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <inttypes.h>
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#include "ztimer.h"
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#include "ztimer/overhead.h"
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#define BASE 1000
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#define SAMPLES 1024
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int main(void)
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{
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uint32_t total = 0;
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int32_t min = INT32_MAX;
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int32_t max = INT32_MIN;
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/* unset configured adjustment */
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/* ZTIMER_USEC->adjust_set = 0; */
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printf("ZTIMER_USEC->adjust_set = %" PRIu16 "\n", ZTIMER_USEC->adjust_set);
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unsigned n = SAMPLES;
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while (n--) {
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int32_t overhead = ztimer_overhead(ZTIMER_USEC, BASE);
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total += labs(overhead);
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if (overhead < min) {
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min = overhead;
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}
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else if (overhead > max) {
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max = overhead;
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}
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}
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printf("min=%" PRIi32 " max=%" PRIi32 " avg_diff=%" PRIi32 "\n", min, max,
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(total / SAMPLES));
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return 0;
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}
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