Add simple timer of ICD preloading in live tests

Adds a simple executable that times how long vkEnumerateInstanceExtensionProperties
takes over and over to see how well the ICD preloading functions.

diff --git a/tests/live_verification/CMakeLists.txt b/tests/live_verification/CMakeLists.txt
index 3873c2dab53859194ec7e303d001cf0ef497cdfb..78e1f1aadc27d780c3eff13b8c145ee8e7a19d9e 100644 (file)
--- a/tests/live_verification/CMakeLists.txt
+++ b/tests/live_verification/CMakeLists.txt
@@ -28,3 +28,6 @@ if(APPLE_STATIC_LOADER)
         target_link_options(macos_static_loader_build PUBLIC -fsanitize=thread)
     endif()
 endif()
+
+add_executable(time_dynamic_loading time_dynamic_loading.cpp)
+target_link_libraries(time_dynamic_loading Vulkan::Headers vulkan)

diff --git a/tests/live_verification/time_dynamic_loading.cpp b/tests/live_verification/time_dynamic_loading.cpp
new file mode 100644 (file)
index 0000000..fec5a58
--- /dev/null
+++ b/tests/live_verification/time_dynamic_loading.cpp
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2023 The Khronos Group Inc.
+ * Copyright (c) 2023 Valve Corporation
+ * Copyright (c) 2023 LunarG, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and/or associated documentation files (the "Materials"), to
+ * deal in the Materials without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Materials, and to permit persons to whom the Materials are
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice(s) and this permission notice shall be included in
+ * all copies or substantial portions of the Materials.
+ *
+ * THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ *
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE MATERIALS OR THE
+ * USE OR OTHER DEALINGS IN THE MATERIALS.
+ *
+ * Author: Charles Giessen <charles@lunarg.com>
+ */
+
+#include <vulkan/vulkan.h>
+
+#include <chrono>
+#include <iostream>
+#include <vector>
+
+int main() {
+    uint32_t iterations = 20;
+    std::vector<std::chrono::milliseconds> samples;
+    samples.resize(iterations);
+    for (uint32_t i = 0; i < iterations; i++) {
+        auto t1 = std::chrono::system_clock::now();
+        uint32_t count = 0;
+        vkEnumerateInstanceExtensionProperties(nullptr, &count, nullptr);
+        // vkEnumerateInstanceLayerProperties(&count, nullptr);
+        // vkEnumerateInstanceVersion(&count);
+        auto t2 = std::chrono::system_clock::now();
+        samples[i] = std::chrono::duration_cast<std::chrono::milliseconds>(t2 - t1);
+    }
+    std::chrono::milliseconds total_time{};
+    for (uint32_t i = 0; i < iterations; i++) {
+        total_time += samples[i];
+    }
+    std::cout << "average time " << total_time.count() / iterations << "ms\n";
+    std::cout << "first call time " << samples[0].count() << "ms\n";
+    std::cout << "second call time " << samples[1].count() << "ms\n";
+    std::cout << "last call time " << samples[iterations - 1].count() << "ms\n";
+}