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2bf66e66d2
Commitc814bf9589("powerpc/selftests: Use timersub() for gettimeofday()"), got the order of arguments to timersub() wrong, leading to a negative time delta being reported, eg: test: gettimeofday tags: git_version:v6.12-rc5-409-gdddf291c3030 time = -3.297781 success: gettimeofday The correct order is minuend, subtrahend, which in this case is end, start. Which gives: test: gettimeofday tags: git_version:v6.12-rc5-409-gdddf291c3030-dirty time = 3.300650 success: gettimeofday Fixes:c814bf9589("powerpc/selftests: Use timersub() for gettimeofday()") Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com> Link: https://patch.msgid.link/20241218114347.428108-1-mpe@ellerman.id.au
34 lines
551 B
C
34 lines
551 B
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright 2015, Anton Blanchard, IBM Corp.
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*/
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#include <sys/time.h>
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#include <stdio.h>
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#include "utils.h"
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static int test_gettimeofday(void)
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{
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int i;
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struct timeval tv_start, tv_end, tv_diff;
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gettimeofday(&tv_start, NULL);
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for(i = 0; i < 100000000; i++) {
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gettimeofday(&tv_end, NULL);
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}
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timersub(&tv_end, &tv_start, &tv_diff);
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printf("time = %.6f\n", tv_diff.tv_sec + (tv_diff.tv_usec) * 1e-6);
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return 0;
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}
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int main(void)
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{
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return test_harness(test_gettimeofday, "gettimeofday");
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}
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