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1 //===-------- `Benchmark` function ----------------------------------------===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8
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9 #include "LibcBenchmark.h"
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10 #include "llvm/Support/Host.h"
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11
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12 namespace llvm {
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13 namespace libc_benchmarks {
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14
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15 void checkRequirements() {
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16 const auto &CpuInfo = benchmark::CPUInfo::Get();
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17 if (CpuInfo.scaling_enabled)
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18 report_fatal_error(
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19 "CPU scaling is enabled, the benchmark real time measurements may be "
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20 "noisy and will incur extra overhead.");
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21 }
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22
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23 HostState HostState::get() {
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24 const auto &CpuInfo = benchmark::CPUInfo::Get();
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25 HostState H;
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26 H.CpuFrequency = CpuInfo.cycles_per_second;
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27 H.CpuName = llvm::sys::getHostCPUName().str();
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28 for (const auto &BenchmarkCacheInfo : CpuInfo.caches) {
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29 CacheInfo CI;
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30 CI.Type = BenchmarkCacheInfo.type;
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31 CI.Level = BenchmarkCacheInfo.level;
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32 CI.Size = BenchmarkCacheInfo.size;
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33 CI.NumSharing = BenchmarkCacheInfo.num_sharing;
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34 H.Caches.push_back(std::move(CI));
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35 }
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36 return H;
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37 }
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38
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39 } // namespace libc_benchmarks
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40 } // namespace llvm
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