Initial checkin of gRPC to third_party/

third_party/grpc/test/cpp/interop/stress_test.cc

Index: third_party/grpc/test/cpp/interop/stress_test.cc
diff --git a/third_party/grpc/test/cpp/interop/stress_test.cc b/third_party/grpc/test/cpp/interop/stress_test.cc
new file mode 100644
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+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *is % allowed in string
+ */
+
+#include <memory>
+#include <string>
+#include <thread>
+#include <utility>
+#include <vector>
+
+#include <gflags/gflags.h>
+#include <grpc++/create_channel.h>
+#include <grpc++/grpc++.h>
+#include <grpc++/impl/thd.h>
+#include <grpc/support/time.h>
+
+#include "test/cpp/interop/interop_client.h"
+#include "test/cpp/interop/stress_interop_client.h"
+#include "test/cpp/util/metrics_server.h"
+#include "test/cpp/util/test_config.h"
+#include "src/proto/grpc/testing/metrics.grpc.pb.h"
+#include "src/proto/grpc/testing/metrics.pb.h"
+
+extern "C" {
+extern void gpr_default_log(gpr_log_func_args* args);
+}
+
+DEFINE_int32(metrics_port, 8081, "The metrics server port.");
+
+DEFINE_int32(metrics_collection_interval_secs, 5,
+             "How often (in seconds) should metrics be recorded.");
+
+DEFINE_int32(sleep_duration_ms, 0,
+             "The duration (in millisec) between two"
+             " consecutive test calls (per server) issued by the server.");
+
+DEFINE_int32(test_duration_secs, -1,
+             "The length of time (in seconds) to run"
+             " the test. Enter -1 if the test should run continuously until"
+             " forcefully terminated.");
+
+DEFINE_string(server_addresses, "localhost:8080",
+              "The list of server"
+              " addresses in the format:\n"
+              " \"<name_1>:<port_1>,<name_2>:<port_1>...<name_N>:<port_N>\"\n"
+              " Note: <name> can be servername or IP address.");
+
+DEFINE_int32(num_channels_per_server, 1, "Number of channels for each server");
+
+DEFINE_int32(num_stubs_per_channel, 1,
+             "Number of stubs per each channels to server. This number also "
+             "indicates the max number of parallel RPC calls on each channel "
+             "at any given time.");
+
+// TODO(sreek): Add more test cases here in future
+DEFINE_string(test_cases, "",
+              "List of test cases to call along with the"
+              " relative weights in the following format:\n"
+              " \"<testcase_1:w_1>,<testcase_2:w_2>...<testcase_n:w_n>\"\n"
+              " The following testcases are currently supported:\n"
+              "   empty_unary\n"
+              "   large_unary\n"
+              "   large_compressed_unary\n"
+              "   client_streaming\n"
+              "   server_streaming\n"
+              "   empty_stream\n"
+              " Example: \"empty_unary:20,large_unary:10,empty_stream:70\"\n"
+              " The above will execute 'empty_unary', 20% of the time,"
+              " 'large_unary', 10% of the time and 'empty_stream' the remaining"
+              " 70% of the time");
+
+DEFINE_int32(log_level, GPR_LOG_SEVERITY_DEBUG,
+             "Severity level of messages that should be logged. Any messages "
+             "greater than or equal to the level set here will be logged. "
+             "The choices are: 0 (GPR_LOG_SEVERITY_DEBUG), 1 "
+             "(GPR_LOG_SEVERITY_INFO) and 2 (GPR_LOG_SEVERITY_ERROR.");
+
+using grpc::testing::kTestCaseList;
+using grpc::testing::MetricsService;
+using grpc::testing::MetricsServiceImpl;
+using grpc::testing::StressTestInteropClient;
+using grpc::testing::TestCaseType;
+using grpc::testing::UNKNOWN_TEST;
+using grpc::testing::WeightedRandomTestSelector;
+
+static int log_level = GPR_LOG_SEVERITY_DEBUG;
+
+// A simple wrapper to grp_default_log() function. This only logs messages at or
+// above the current log level (set in 'log_level' variable)
+void TestLogFunction(gpr_log_func_args* args) {
+  if (args->severity >= log_level) {
+    gpr_default_log(args);
+  }
+}
+
+TestCaseType GetTestTypeFromName(const grpc::string& test_name) {
+  TestCaseType test_case = UNKNOWN_TEST;
+
+  for (auto it = kTestCaseList.begin(); it != kTestCaseList.end(); it++) {
+    if (test_name == it->second) {
+      test_case = it->first;
+      break;
+    }
+  }
+
+  return test_case;
+}
+
+// Converts a string of comma delimited tokens to a vector of tokens
+bool ParseCommaDelimitedString(const grpc::string& comma_delimited_str,
+                               std::vector<grpc::string>& tokens) {
+  size_t bpos = 0;
+  size_t epos = grpc::string::npos;
+
+  while ((epos = comma_delimited_str.find(',', bpos)) != grpc::string::npos) {
+    tokens.emplace_back(comma_delimited_str.substr(bpos, epos - bpos));
+    bpos = epos + 1;
+  }
+
+  tokens.emplace_back(comma_delimited_str.substr(bpos));  // Last token
+  return true;
+}
+
+// Input: Test case string "<testcase_name:weight>,<testcase_name:weight>...."
+// Output:
+//   - Whether parsing was successful (return value)
+//   - Vector of (test_type_enum, weight) pairs returned via 'tests' parameter
+bool ParseTestCasesString(const grpc::string& test_cases,
+                          std::vector<std::pair<TestCaseType, int>>& tests) {
+  bool is_success = true;
+
+  std::vector<grpc::string> tokens;
+  ParseCommaDelimitedString(test_cases, tokens);
+
+  for (auto it = tokens.begin(); it != tokens.end(); it++) {
+    // Token is in the form <test_name>:<test_weight>
+    size_t colon_pos = it->find(':');
+    if (colon_pos == grpc::string::npos) {
+      gpr_log(GPR_ERROR, "Error in parsing test case string: %s", it->c_str());
+      is_success = false;
+      break;
+    }
+
+    grpc::string test_name = it->substr(0, colon_pos);
+    int weight = std::stoi(it->substr(colon_pos + 1));
+    TestCaseType test_case = GetTestTypeFromName(test_name);
+    if (test_case == UNKNOWN_TEST) {
+      gpr_log(GPR_ERROR, "Unknown test case: %s", test_name.c_str());
+      is_success = false;
+      break;
+    }
+
+    tests.emplace_back(std::make_pair(test_case, weight));
+  }
+
+  return is_success;
+}
+
+// For debugging purposes
+void LogParameterInfo(const std::vector<grpc::string>& addresses,
+                      const std::vector<std::pair<TestCaseType, int>>& tests) {
+  gpr_log(GPR_INFO, "server_addresses: %s", FLAGS_server_addresses.c_str());
+  gpr_log(GPR_INFO, "test_cases : %s", FLAGS_test_cases.c_str());
+  gpr_log(GPR_INFO, "sleep_duration_ms: %d", FLAGS_sleep_duration_ms);
+  gpr_log(GPR_INFO, "test_duration_secs: %d", FLAGS_test_duration_secs);
+
+  int num = 0;
+  for (auto it = addresses.begin(); it != addresses.end(); it++) {
+    gpr_log(GPR_INFO, "%d:%s", ++num, it->c_str());
+  }
+
+  num = 0;
+  for (auto it = tests.begin(); it != tests.end(); it++) {
+    TestCaseType test_case = it->first;
+    int weight = it->second;
+    gpr_log(GPR_INFO, "%d. TestCaseType: %d, Weight: %d", ++num, test_case,
+            weight);
+  }
+}
+
+int main(int argc, char** argv) {
+  grpc::testing::InitTest(&argc, &argv, true);
+
+  if (FLAGS_log_level > GPR_LOG_SEVERITY_ERROR ||
+      FLAGS_log_level < GPR_LOG_SEVERITY_DEBUG) {
+    gpr_log(GPR_ERROR, "log_level should be an integer between %d and %d",
+            GPR_LOG_SEVERITY_DEBUG, GPR_LOG_SEVERITY_ERROR);
+    return 1;
+  }
+
+  // Change the default log function to TestLogFunction which respects the
+  // log_level setting.
+  log_level = FLAGS_log_level;
+  gpr_set_log_function(TestLogFunction);
+
+  srand(time(NULL));
+
+  // Parse the server addresses
+  std::vector<grpc::string> server_addresses;
+  ParseCommaDelimitedString(FLAGS_server_addresses, server_addresses);
+
+  // Parse test cases and weights
+  if (FLAGS_test_cases.length() == 0) {
+    gpr_log(GPR_ERROR, "Not running tests. The 'test_cases' string is empty");
+    return 1;
+  }
+
+  std::vector<std::pair<TestCaseType, int>> tests;
+  if (!ParseTestCasesString(FLAGS_test_cases, tests)) {
+    gpr_log(GPR_ERROR, "Error in parsing test cases string %s ",
+            FLAGS_test_cases.c_str());
+    return 1;
+  }
+
+  LogParameterInfo(server_addresses, tests);
+
+  WeightedRandomTestSelector test_selector(tests);
+  MetricsServiceImpl metrics_service;
+
+  gpr_log(GPR_INFO, "Starting test(s)..");
+
+  std::vector<grpc::thread> test_threads;
+
+  // Create and start the test threads.
+  // Note that:
+  // - Each server can have multiple channels (as configured by
+  // FLAGS_num_channels_per_server).
+  //
+  // - Each channel can have multiple stubs (as configured by
+  // FLAGS_num_stubs_per_channel). This is to test calling multiple RPCs in
+  // parallel on the same channel.
+  int thread_idx = 0;
+  int server_idx = -1;
+  char buffer[256];
+  for (auto it = server_addresses.begin(); it != server_addresses.end(); it++) {
+    ++server_idx;
+    // Create channel(s) for each server
+    for (int channel_idx = 0; channel_idx < FLAGS_num_channels_per_server;
+         channel_idx++) {
+      // TODO (sreek). This won't work for tests that require Authentication
+      std::shared_ptr<grpc::Channel> channel(
+          grpc::CreateChannel(*it, grpc::InsecureChannelCredentials()));
+
+      // Create stub(s) for each channel
+      for (int stub_idx = 0; stub_idx < FLAGS_num_stubs_per_channel;
+           stub_idx++) {
+        StressTestInteropClient* client = new StressTestInteropClient(
+            ++thread_idx, *it, channel, test_selector, FLAGS_test_duration_secs,
+            FLAGS_sleep_duration_ms, FLAGS_metrics_collection_interval_secs);
+
+        bool is_already_created;
+        // Gauge name
+        std::snprintf(buffer, sizeof(buffer),
+                      "/stress_test/server_%d/channel_%d/stub_%d/qps",
+                      server_idx, channel_idx, stub_idx);
+
+        test_threads.emplace_back(grpc::thread(
+            &StressTestInteropClient::MainLoop, client,
+            metrics_service.CreateGauge(buffer, &is_already_created)));
+
+        // The Gauge should not have been already created
+        GPR_ASSERT(!is_already_created);
+      }
+    }
+  }
+
+  // Start metrics server before waiting for the stress test threads
+  std::unique_ptr<grpc::Server> metrics_server =
+      metrics_service.StartServer(FLAGS_metrics_port);
+
+  // Wait for the stress test threads to complete
+  for (auto it = test_threads.begin(); it != test_threads.end(); it++) {
+    it->join();
+  }
+
+  return 0;
+}