From 2e017da58aeb335e79f7bbf0797aad45a59d293b Mon Sep 17 00:00:00 2001
From: Soheil Hassas Yeganeh <soheil@google.com>
Date: Fri, 21 Dec 2018 18:14:08 -0500
Subject: Add microbenchmarks for grpc_timer

This helps assessing upcoming changes.
---
 test/cpp/microbenchmarks/BUILD       |   7 +++
 test/cpp/microbenchmarks/bm_timer.cc | 118 +++++++++++++++++++++++++++++++++++
 2 files changed, 125 insertions(+)
 create mode 100644 test/cpp/microbenchmarks/bm_timer.cc

(limited to 'test')

diff --git a/test/cpp/microbenchmarks/BUILD b/test/cpp/microbenchmarks/BUILD
index b5890bece7..a29462f78f 100644
--- a/test/cpp/microbenchmarks/BUILD
+++ b/test/cpp/microbenchmarks/BUILD
@@ -189,3 +189,10 @@ grpc_cc_binary(
         "//src/proto/grpc/testing:echo_proto",
     ],
 )
+
+grpc_cc_binary(
+    name = "bm_timer",
+    testonly = 1,
+    srcs = ["bm_timer.cc"],
+    deps = [":helpers"],
+)
diff --git a/test/cpp/microbenchmarks/bm_timer.cc b/test/cpp/microbenchmarks/bm_timer.cc
new file mode 100644
index 0000000000..f5a411251b
--- /dev/null
+++ b/test/cpp/microbenchmarks/bm_timer.cc
@@ -0,0 +1,118 @@
+/*
+ *
+ * Copyright 2017 gRPC 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 <benchmark/benchmark.h>
+#include <string.h>
+#include <atomic>
+#include <vector>
+
+#include <grpc/grpc.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include "test/cpp/microbenchmarks/helpers.h"
+#include "test/cpp/util/test_config.h"
+
+#include "src/core/lib/iomgr/timer.h"
+
+namespace grpc {
+namespace testing {
+
+auto& force_library_initialization = Library::get();
+
+struct TimerClosure {
+  grpc_timer timer;
+  grpc_closure closure;
+};
+
+static void BM_InitCancelTimer(benchmark::State& state) {
+  constexpr int kTimerCount = 1024;
+  TrackCounters track_counters;
+  grpc_core::ExecCtx exec_ctx;
+  std::vector<TimerClosure> timer_closures(kTimerCount);
+  int i = 0;
+  while (state.KeepRunning()) {
+    TimerClosure* timer_closure = &timer_closures[i++ % kTimerCount];
+    GRPC_CLOSURE_INIT(&timer_closure->closure,
+                      [](void* /*args*/, grpc_error* /*err*/) {}, nullptr,
+                      grpc_schedule_on_exec_ctx);
+    grpc_timer_init(&timer_closure->timer, GRPC_MILLIS_INF_FUTURE,
+                    &timer_closure->closure);
+    grpc_timer_cancel(&timer_closure->timer);
+    exec_ctx.Flush();
+  }
+  track_counters.Finish(state);
+}
+BENCHMARK(BM_InitCancelTimer);
+
+static void BM_TimerBatch(benchmark::State& state) {
+  constexpr int kTimerCount = 1024;
+  const bool check = state.range(0);
+  const bool reverse = state.range(1);
+
+  const grpc_millis start =
+      reverse ? GRPC_MILLIS_INF_FUTURE : GRPC_MILLIS_INF_FUTURE - kTimerCount;
+  const grpc_millis end =
+      reverse ? GRPC_MILLIS_INF_FUTURE - kTimerCount : GRPC_MILLIS_INF_FUTURE;
+  const grpc_millis increment = reverse ? -1 : 1;
+
+  TrackCounters track_counters;
+  grpc_core::ExecCtx exec_ctx;
+  std::vector<TimerClosure> timer_closures(kTimerCount);
+  while (state.KeepRunning()) {
+    for (grpc_millis deadline = start; deadline != end; deadline += increment) {
+      TimerClosure* timer_closure = &timer_closures[deadline % kTimerCount];
+      GRPC_CLOSURE_INIT(&timer_closure->closure,
+                        [](void* /*args*/, grpc_error* /*err*/) {}, nullptr,
+                        grpc_schedule_on_exec_ctx);
+
+      grpc_timer_init(&timer_closure->timer, deadline, &timer_closure->closure);
+    }
+    if (check) {
+      grpc_millis next;
+      grpc_timer_check(&next);
+    }
+    for (grpc_millis deadline = start; deadline != end; deadline += increment) {
+      TimerClosure* timer_closure = &timer_closures[deadline % kTimerCount];
+      grpc_timer_cancel(&timer_closure->timer);
+    }
+    exec_ctx.Flush();
+  }
+  track_counters.Finish(state);
+}
+BENCHMARK(BM_TimerBatch)
+    ->Args({/*check=*/false, /*reverse=*/false})
+    ->Args({/*check=*/false, /*reverse=*/true})
+    ->Args({/*check=*/true, /*reverse=*/false})
+    ->Args({/*check=*/true, /*reverse=*/true})
+    ->ThreadRange(1, 128);
+
+}  // namespace testing
+}  // namespace grpc
+
+// Some distros have RunSpecifiedBenchmarks under the benchmark namespace,
+// and others do not. This allows us to support both modes.
+namespace benchmark {
+void RunTheBenchmarksNamespaced() { RunSpecifiedBenchmarks(); }
+}  // namespace benchmark
+
+int main(int argc, char** argv) {
+  ::benchmark::Initialize(&argc, argv);
+  ::grpc::testing::InitTest(&argc, &argv, false);
+  benchmark::RunTheBenchmarksNamespaced();
+  return 0;
+}
-- 
cgit v1.2.3