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InstanceBrick
7dc4f55642
Integrate Frame OpenXR input, SteamVR video controls, gaze foveation, native audio, frame pacing and source-based packaging.
30 lines
1.0 KiB
C++
30 lines
1.0 KiB
C++
#pragma once
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#include <algorithm>
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#include <cstdint>
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#include <vector>
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namespace mocktail::vr::internal {
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struct CpuCapacity { unsigned id; unsigned capacity; };
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// Input contains only CPUs already allowed for this thread. Keep near-peer
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// performance cores together, and retain the original mask if information is
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// incomplete or a preference would leave fewer than two available cores.
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inline std::vector<unsigned> PerformanceCpuSubset(
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const std::vector<CpuCapacity>& allowed) {
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std::vector<unsigned> original;
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unsigned maximum = 0;
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bool complete = true;
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for (const auto& cpu : allowed) {
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original.push_back(cpu.id);
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maximum = std::max(maximum, cpu.capacity);
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complete = complete && cpu.capacity > 0;
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}
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if (!complete || !maximum || allowed.size() < 2) return original;
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std::vector<unsigned> selected;
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for (const auto& cpu : allowed)
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if (std::uint64_t(cpu.capacity) * 5 >= std::uint64_t(maximum) * 4)
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selected.push_back(cpu.id);
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return selected.size() >= 2 ? selected : original;
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}
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} // namespace mocktail::vr::internal
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