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32 lines
623 B
C++
32 lines
623 B
C++
#include "timer.h"
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// Make sure to compile this translation unit with the host compiler and not
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// nvcc, lest you hit an internal compiler error (ICE) with GCC 10.3.0
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#include <chrono>
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namespace {
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std::uint64_t now()
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{
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using clock = std::chrono::steady_clock;
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return std::chrono::duration_cast<std::chrono::nanoseconds>(clock::now().time_since_epoch()).count();
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}
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} // namespace
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timer::timer()
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{
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t0 = now();
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}
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double timer::elapsed() const
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{
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std::uint64_t t1 = now();
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return 1.e-9 * (t1 - t0);
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}
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double timer::reset()
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{
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std::uint64_t t1 = now();
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double ans = 1.e-9 * (t1 - t0);
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t0 = t1;
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return ans;
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} |