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ac8f51cb52
By selecting the start value as a multiple of HWTIMER_SPIN_BARRIER+1, the test now includes the smallest non-spinning value.
47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
/*
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* Copyright (C) 2014 Ludwig Ortmann <ludwig.ortmann@fu-berlin.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 tests
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* @{
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*
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* @file
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* @brief Hwtimer test application
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*
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* @author Ludwig Ortmann <ludwig.ortmann@fu-berlin.de>
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*
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* @}
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*/
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#include <stdio.h>
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#include <math.h>
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#include "hwtimer.h"
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#include "board.h"
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int main(void)
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{
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puts("This is a regression test for a race condition in hwtimer_wait.");
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puts("When the race condition is hit, the timer will wait for a very very long time.");
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long iterations = 10000;
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long start_duration = (HWTIMER_SPIN_BARRIER + 1) << 5;
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long duration = iterations * start_duration * 2L;
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printf("The test should take about %li sec.\n", (HWTIMER_TICKS_TO_US(duration)/1000000));
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for (unsigned long r = iterations; r > 0; r--) {
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for (unsigned long i = start_duration; i > HWTIMER_SPIN_BARRIER; i = i >> 1) {
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hwtimer_wait(i);
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}
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}
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puts("success");
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return 0;
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}
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