Generating flame graph

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "Catch2"]
 	path = Catch2
 	url = https://github.com/catchorg/Catch2.git
+[submodule "FlameGraph"]
+	path = FlameGraph
+	url = https://github.com/brendangregg/FlameGraph.git

CMakeLists.txt

@@ -1,7 +1,12 @@
 cmake_minimum_required (VERSION 3.10)
 project (PerformanceMeasuring)
 
-set(HEADER_FILES dummy_lib.hpp Catch2/single_include/catch2/catch.hpp)
+set(CMAKE_CXX_FLAGS "-ggdb")
 
-add_executable(performance_measuring catch2_test1.cpp ${HEADER_FILES})
-target_include_directories(performance_measuring PRIVATE . Catch2/single_include)
+set(CATCH_HEADER_FILES dummy_lib.hpp Catch2/single_include/catch2/catch.hpp)
+add_executable(performance_measuring_test catch2_test1.cpp ${HEADER_FILES})
+target_include_directories(performance_measuring_test PRIVATE . Catch2/single_include)
+
+set(HEADER_FILES dummy_lib.hpp)
+add_executable(performance_measuring main.cpp ${HEADER_FILES})
+target_include_directories(performance_measuring PRIVATE .)

FlameGraph

@@ -0,0 +1 @@
+Subproject commit 1b1c6deede9c33c5134c920bdb7a44cc5528e9a7

Jenkinsfile

@@ -15,11 +15,19 @@ pipeline {
 			}
 		}
 
-		stage('Run') {
+		stage('Running catch2 tests') {
 			steps {
-				sh 'performance_measuring'
+				sh 'performance_measuring_test'
+			}
+		}
+
+		stage('Generatin flamegraph') {
+			steps {
+				sh 'generate_flame_graph.sh'
+				archiveArtifacts artifacts: 'flamegraph.svg', fingerprint: true
 			}
 		}
 
 	}
 }
+

catch2_test1.cpp

@@ -16,6 +16,8 @@ std::vector<int> generate_random_numbers(int n, int min, int max)
 	return v;
 }
 
+// How many times the smallest element occurts in a vector?
+
 TEST_CASE( "Simple test" ) {
 	std::vector<int> v = { 1, 2, 3, 1};
 	REQUIRE( performance_measuring::count_on_the_way(v) == 2 );

dummy_lib.hpp

@@ -4,6 +4,8 @@
 #include <vector>
 #include <algorithm>
 
+// How many times the smallest element occurts in a vector?
+
 namespace performance_measuring {
 
 int count_on_the_way(const std::vector<int>& v)

main.cpp

@@ -0,0 +1,35 @@
+#include <cstdlib>
+#include <ctime>
+#include <cassert>
+
+#include <vector>
+
+#include "dummy_lib.hpp"
+
+
+std::vector<int> generate_random_numbers(int n, int min, int max)
+{
+       std::srand(std::time(nullptr));
+       std::vector<int> v(n);
+       for (int i = 0; i < n; ++i)
+               v[i] = min + std::rand() / ((RAND_MAX + 1u)/max);
+
+       return v;
+}
+
+int main(int /*argc*/, char* /*argv*/[])
+{
+       std::vector<int> v = generate_random_numbers(10000, 0, 1000);
+
+       // How many times does the smallest element occursts in the vector?
+
+       int r1 = performance_measuring::count_on_the_way(v);
+       int r2 = performance_measuring::min_element_and_count(v);
+       int r3 = performance_measuring::sort_and_upper_bound(v);
+
+       assert(r1 == r2);
+       assert(r2 == r3);
+
+       return EXIT_SUCCESS;
+}
+