From 014f02a3eca93ef88163c3b408c86998ecf6572c Mon Sep 17 00:00:00 2001
From: Abseil Team <absl-team@google.com>
Date: Tue, 22 May 2018 16:34:47 -0700
Subject:   - 45b4111d940009bc7b3ebf621c9cb9293c60344a Use copied value i in
 lambda by Abseil Team <absl-team@google.com>   -
 b726b3102f8439b8480b6ff52fc3660162fa0bd9 Fix MSVC compiler warning on 32-bit
 platforms (GitHub iss... by Derek Mauro <dmauro@google.com>   -
 a8a29e636c85bd7d82c0cbc824a1c2e498764337 Explicitly forbid to specify the
 template parameter to Wr... by Abseil Team <absl-team@google.com>   -
 566a1d903266fdbfdcf758401c356a0c6703422d Add missing license header to BUILD
 file. by Alex Strelnikov <strel@google.com>   -
 ef1c0642cde0bbad62bbb30715256b232a4ab817 Fix BUILD file header. by Alex
 Strelnikov <strel@google.com>   - b6e2cf00f808ee32b9eb7b3226af79d628742c20
 Release GraphCycles microbenchmark. by Alex Strelnikov <strel@google.com>   -
 f592d78f549e7a242bf2bb4858a26645a655eac3 Release Mutex microbenchmarks. by
 Alex Strelnikov <strel@google.com>

GitOrigin-RevId: 45b4111d940009bc7b3ebf621c9cb9293c60344a
Change-Id: I82885ae176952a764574c6d4616e312a977407b2
---
 .../internal/graphcycles_benchmark.cc              | 46 ++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 absl/synchronization/internal/graphcycles_benchmark.cc

(limited to 'absl/synchronization/internal/graphcycles_benchmark.cc')

diff --git a/absl/synchronization/internal/graphcycles_benchmark.cc b/absl/synchronization/internal/graphcycles_benchmark.cc
new file mode 100644
index 0000000..b4a1deb
--- /dev/null
+++ b/absl/synchronization/internal/graphcycles_benchmark.cc
@@ -0,0 +1,46 @@
+// Copyright 2018 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/synchronization/internal/graphcycles.h"
+
+#include <algorithm>
+#include <cstdint>
+#include <vector>
+
+#include "benchmark/benchmark.h"
+#include "absl/base/internal/raw_logging.h"
+
+namespace {
+
+void BM_StressTest(benchmark::State& state) {
+  const int num_nodes = state.range(0);
+  while (state.KeepRunningBatch(num_nodes)) {
+    absl::synchronization_internal::GraphCycles g;
+    std::vector<absl::synchronization_internal::GraphId> nodes(num_nodes);
+    for (int i = 0; i < num_nodes; i++) {
+      nodes[i] = g.GetId(reinterpret_cast<void*>(static_cast<uintptr_t>(i)));
+    }
+    for (int i = 0; i < num_nodes; i++) {
+      int end = std::min(num_nodes, i + 5);
+      for (int j = i + 1; j < end; j++) {
+        ABSL_RAW_CHECK(g.InsertEdge(nodes[i], nodes[j]), "");
+      }
+    }
+  }
+}
+BENCHMARK(BM_StressTest)->Range(2048, 1048576);
+
+}  // namespace
+
+BENCHMARK_MAIN();
-- 
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