feat: add sleep benches

Author: not-matthias

core/instrument-hooks

@@ -0,0 +1 @@
+Subproject commit a9ae7a4d897dbb694cb0355c9994141a7c4a1ab9

examples/google_benchmark_bazel/sleep_bench.hpp

@@ -0,0 +1 @@
+../google_benchmark_cmake/sleep_bench.hpp

examples/google_benchmark_cmake/main.cpp

@@ -3,6 +3,7 @@
 #include <cstring>
 
 #include "fixture_bench.hpp"
+#include "sleep_bench.hpp"
 #include "template_bench.hpp"
 
 template <class... Args>

examples/google_benchmark_cmake/sleep_bench.hpp

@@ -0,0 +1,103 @@
+#pragma once
+
+#include <benchmark/benchmark.h>
+
+#include <chrono>
+#include <thread>
+
+// Note: `std::this_thread::sleep_for` and other methods rely on the kernel's
+// scheduling and may not be precise for very short durations (<1ms). By using
+// a busy-wait loop, we can achieve more precise timing at the cost of CPU
+// usage.
+//
+// See COD-1155 for more information.
+static inline void busy_sleep_for(std::chrono::nanoseconds duration) {
+  auto start = std::chrono::steady_clock::now();
+  while ((std::chrono::steady_clock::now() - start) < duration) {
+    // Busy-wait
+  }
+}
+
+static void BM_sleep_1ns(benchmark::State& state) {
+  for (auto _ : state) {
+    busy_sleep_for(std::chrono::nanoseconds(1));
+  }
+}
+BENCHMARK(BM_sleep_1ns);
+
+static void BM_sleep_10ns(benchmark::State& state) {
+  for (auto _ : state) {
+    busy_sleep_for(std::chrono::nanoseconds(10));
+  }
+}
+BENCHMARK(BM_sleep_10ns);
+
+static void BM_sleep_50ns(benchmark::State& state) {
+  for (auto _ : state) {
+    busy_sleep_for(std::chrono::nanoseconds(50));
+  }
+}
+BENCHMARK(BM_sleep_50ns);
+
+static void BM_sleep_100ns(benchmark::State& state) {
+  for (auto _ : state) {
+    busy_sleep_for(std::chrono::nanoseconds(100));
+  }
+}
+BENCHMARK(BM_sleep_100ns);
+
+static void BM_sleep_1us(benchmark::State& state) {
+  for (auto _ : state) {
+    busy_sleep_for(std::chrono::microseconds(1));
+  }
+}
+BENCHMARK(BM_sleep_1us);
+
+static void BM_sleep_10us(benchmark::State& state) {
+  for (auto _ : state) {
+    busy_sleep_for(std::chrono::microseconds(10));
+  }
+}
+BENCHMARK(BM_sleep_10us);
+
+static void BM_sleep_50us(benchmark::State& state) {
+  for (auto _ : state) {
+    busy_sleep_for(std::chrono::microseconds(50));
+  }
+}
+BENCHMARK(BM_sleep_50us);
+
+static void BM_sleep_100us(benchmark::State& state) {
+  for (auto _ : state) {
+    busy_sleep_for(std::chrono::microseconds(100));
+  }
+}
+BENCHMARK(BM_sleep_100us);
+
+static void BM_sleep_1ms(benchmark::State& state) {
+  for (auto _ : state) {
+    busy_sleep_for(std::chrono::milliseconds(1));
+  }
+}
+BENCHMARK(BM_sleep_1ms);
+
+static void BM_sleep_10ms(benchmark::State& state) {
+  for (auto _ : state) {
+    busy_sleep_for(std::chrono::milliseconds(10));
+  }
+}
+BENCHMARK(BM_sleep_10ms);
+
+static void BM_sleep_50ms(benchmark::State& state) {
+  for (auto _ : state) {
+    busy_sleep_for(std::chrono::milliseconds(50));
+  }
+}
+BENCHMARK(BM_sleep_50ms);
+
+static void BM_sleep_100ms(benchmark::State& state) {
+  for (auto _ : state) {
+    busy_sleep_for(std::chrono::milliseconds(100));
+  }
+}
+BENCHMARK(BM_sleep_100ms);