49 lines
1.3 KiB
C++
49 lines
1.3 KiB
C++
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#include "doctest/doctest.h"
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#include "quill/backend/RdtscClock.h"
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#include "quill/core/Rdtsc.h"
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#include <chrono>
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#include <thread>
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TEST_SUITE_BEGIN("RdtscClock");
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void check_wall_time_now(quill::detail::RdtscClock const& tsc_clock, size_t& failures)
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{
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std::chrono::milliseconds constexpr offset{10};
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auto const wall_time_chrono = std::chrono::system_clock::now().time_since_epoch();
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auto const wall_time_tsc = std::chrono::nanoseconds{tsc_clock.time_since_epoch(quill::detail::rdtsc())};
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auto const lower_bound = wall_time_chrono - offset;
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auto const upper_bound = wall_time_chrono + offset;
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if (!((wall_time_tsc > lower_bound) && (wall_time_tsc < upper_bound)))
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{
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++failures;
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if (failures > 1)
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{
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// wall_time_tsc is not between wall_time_chrono - 1 and wall_time_chrono + 1
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FAIL("wall_time_tsc: " << wall_time_tsc.count() << " lower_bound: " << lower_bound.count()
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<< " upper_bound: " << upper_bound.count() << "\n");
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}
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}
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}
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TEST_CASE("wall_time")
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{
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quill::detail::RdtscClock const tsc_clock{std::chrono::milliseconds{1200}};
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constexpr size_t num_reps{10};
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size_t failures{0};
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for (size_t i = 1; i <= num_reps; ++i)
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{
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check_wall_time_now(tsc_clock, failures);
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std::this_thread::sleep_for(std::chrono::milliseconds{i * 100});
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}
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REQUIRE_LE(failures, 1);
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}
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TEST_SUITE_END();
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