feat(stress): reworked stress-test to show status, including avg latency

Patric Stout
1 parent d5d85340
Showing 4 changed files with 38 additions and 14 deletions
CMakeLists.txt
example/pubsub/main.cpp
example/pubstress/CMakeLists.txt → example/stress/CMakeLists.txt
example/pubstress/main.cpp → example/stress/main.cpp
@@ -52,5 +52,5 @@ target_compile_options(${PROJECT_NAME} PRIVATE -Wall -Wextra -Wpedantic -Werror)
 install(TARGETS ${PROJECT_NAME} LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
 install(FILES ${CMAKE_BINARY_DIR}/truemqtt.pc DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/pkgconfig)
-add_subdirectory(example/pubstress)
 add_subdirectory(example/pubsub)
+add_subdirectory(example/stress)
@@ -22,7 +22,6 @@ int main()
     client.setLastWill("test/lastwill", "example pubsub finished", true);
     client.connect();
-    std::this_thread::sleep_for(std::chrono::milliseconds(100));
     int stop = 0;
@@ -7,7 +7,7 @@
 cmake_minimum_required(VERSION 3.16)
-project(truemqtt_pubstress)
+project(truemqtt_stress)
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
@@ -24,10 +24,21 @@ int main()
     client.connect();
     std::this_thread::sleep_for(std::chrono::milliseconds(100));
-    int stop = 0;
+    size_t received = 0;
+    size_t sent = 0;
+    size_t failed = 0;
+    int64_t totalLatency = 0;
     // Subscribe to the topic we are going to stress test.
-    client.subscribe("test/test/test", [&stop](const std::string topic, const std::string payload) {});
+    client.subscribe("test/test/test", [&received, &totalLatency](const std::string topic, const std::string payload)
+                     {
+        // Calculate the latency.
+        auto now = std::chrono::steady_clock::now();
+        auto then = std::chrono::time_point<std::chrono::steady_clock>(std::chrono::microseconds(std::stoll(payload)));
+        auto latency = std::chrono::duration_cast<std::chrono::microseconds>(now - then).count();
+
+        totalLatency += latency;
+        received++; });
     // Send a lot of packets constantly, while telling us when publishing is failing.
     // The expected behaviour is that this goes okay for a while, till the broker
@@ -35,24 +46,38 @@ int main()
     // to its breaking point, it helps to add additional subscriptions by other
     // means.
     bool is_failing = true;
+    auto start = std::chrono::steady_clock::now();
     while (true)
     {
-        if (!client.publish("test/test/test", "Hello World!", false))
+        auto now = std::chrono::steady_clock::now();
+        auto now_ms = std::chrono::duration_cast<std::chrono::microseconds>(now.time_since_epoch()).count();
+
+        // Publish the current time, so we can check the latency.
+        if (!client.publish("test/test/test", std::to_string(now_ms), false))
         {
-            if (!is_failing)
-            {
-                is_failing = true;
-                std::cout << "Failed to publish message" << std::endl;
-            }
+            failed++;
         }
         else
         {
-            if (is_failing)
+            sent++;
+        }
+
+        // Every second, tell how much messages per second we sent, received and failed.
+        if (now - start > std::chrono::seconds(1))
+        {
+            if (received != 0)
             {
-                is_failing = false;
-                std::cout << "Succeeded to publish message" << std::endl;
+                std::cout << "Sent: " << sent << "/s - Received: " << received << "/s - Failed: " << failed << "/s - Avg Latency: " << (totalLatency / received) << "us" << std::endl;
             }
+            sent = 0;
+            received = 0;
+            failed = 0;
+            totalLatency = 0;
+            start = now;
         }
+
+        // Don't go too fast, to get a better idea of the latency.
+        std::this_thread::sleep_for(std::chrono::microseconds(10));
     }
     // This application never ends, but for good measure, a disconnect.