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Merge pull request #11173 from Morph1984/atleast_nanosecond_precision
wall_clock: Increase precision requirements
pull/15/merge
liamwhite
2 years ago
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GitHub
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1 changed files with
2 additions and
2 deletions
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src/common/wall_clock.cpp
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@ -56,12 +56,12 @@ std::unique_ptr<WallClock> CreateOptimalClock() { |
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#ifdef ARCHITECTURE_x86_64
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const auto& caps = GetCPUCaps(); |
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if (caps.invariant_tsc && caps.tsc_frequency >= WallClock::GPUTickFreq) { |
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if (caps.invariant_tsc && caps.tsc_frequency >= std::nano::den) { |
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return std::make_unique<X64::NativeClock>(caps.tsc_frequency); |
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} else { |
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// Fallback to StandardWallClock if the hardware TSC
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// - Is not invariant
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// - Is not more precise than GPUTickFreq
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// - Is not more precise than 1 GHz (1ns resolution)
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return std::make_unique<StandardWallClock>(); |
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} |
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#else
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