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test-coroutine: avoid overflow on 32-bit systems

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unsigned long is not large enough to represent 1000000000 * duration there.
Just use floating point.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Message-id: 1417518350-6167-4-git-send-email-pbonzini@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Paolo Bonzini 2014-12-02 12:05:46 +01:00 committed by Stefan Hajnoczi
parent ef57137f1b
commit 6d86ae0824
1 changed files with 1 additions and 1 deletions
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2
tests/test-coroutine.c
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@ -337,7 +337,7 @@ static void perf_cost(void)
"%luns per coroutine", "%luns per coroutine",
maxcycles, maxcycles,
duration, ops, duration, ops,
(unsigned long)(1000000000 * duration) / maxcycles); (unsigned long)(1000000000.0 * duration / maxcycles));
} }
int main(int argc, char **argv) int main(int argc, char **argv)