3 files changed, 18 insertions, 17 deletions
diff --git a/src/tuning/tuning.hpp b/src/tuning/tuning.hpp
index 19df5f9a..13bae5a6 100644
--- a/src/tuning/tuning.hpp
+++ b/src/tuning/tuning.hpp
@@ -30,6 +30,7 @@ namespace clblast {
 // that it is automatically compiled for the various kernels (given as the 'C' template argument).
 template <typename C, typename T>
 void Tuner(int argc, char* argv[]) {
+  constexpr auto kSeed = 42; // fixed seed for reproducibility
 
   // Sets the parameters and platform/device for which to tune (command-line options)
   auto help = std::string{"* Options given/available:\n"};
@@ -73,12 +74,12 @@ void Tuner(int argc, char* argv[]) {
   auto b_mat = std::vector<T>(C::GetSizeB(args));
   auto c_mat = std::vector<T>(C::GetSizeC(args));
   auto temp = std::vector<T>(C::GetSizeTemp(args));
-  PopulateVector(x_vec);
-  PopulateVector(y_vec);
-  PopulateVector(a_mat);
-  PopulateVector(b_mat);
-  PopulateVector(c_mat);
-  PopulateVector(temp);
+  PopulateVector(x_vec, kSeed);
+  PopulateVector(y_vec, kSeed);
+  PopulateVector(a_mat, kSeed);
+  PopulateVector(b_mat, kSeed);
+  PopulateVector(c_mat, kSeed);
+  PopulateVector(temp, kSeed);
 
   // Initializes the tuner for the chosen device
   cltune::Tuner tuner(args.platform_id, args.device_id);
diff --git a/src/utilities.cpp b/src/utilities.cpp
index 77bc72d7..86cc2d13 100644
--- a/src/utilities.cpp
+++ b/src/utilities.cpp
@@ -270,40 +270,40 @@ unsigned int GetRandomSeed() {
 
 // Create a random number generator and populates a vector with samples from a random distribution
 template <typename T>
-void PopulateVector(std::vector<T> &vector) {
+void PopulateVector(std::vector<T> &vector, const unsigned int seed) {
   auto lower_limit = static_cast<T>(kTestDataLowerLimit);
   auto upper_limit = static_cast<T>(kTestDataUpperLimit);
-  std::mt19937 mt(GetRandomSeed());
+  std::mt19937 mt(seed);
   std::uniform_real_distribution<T> dist(lower_limit, upper_limit);
   for (auto &element: vector) { element = dist(mt); }
 }
-template void PopulateVector<float>(std::vector<float>&);
-template void PopulateVector<double>(std::vector<double>&);
+template void PopulateVector<float>(std::vector<float>&, const unsigned int);
+template void PopulateVector<double>(std::vector<double>&, const unsigned int);
 
 // Specialized versions of the above for complex data-types
 template <>
-void PopulateVector(std::vector<float2> &vector) {
+void PopulateVector(std::vector<float2> &vector, const unsigned int seed) {
   auto lower_limit = static_cast<float>(kTestDataLowerLimit);
   auto upper_limit = static_cast<float>(kTestDataUpperLimit);
-  std::mt19937 mt(GetRandomSeed());
+  std::mt19937 mt(seed);
   std::uniform_real_distribution<float> dist(lower_limit, upper_limit);
   for (auto &element: vector) { element.real(dist(mt)); element.imag(dist(mt)); }
 }
 template <>
-void PopulateVector(std::vector<double2> &vector) {
+void PopulateVector(std::vector<double2> &vector, const unsigned int seed) {
   auto lower_limit = static_cast<double>(kTestDataLowerLimit);
   auto upper_limit = static_cast<double>(kTestDataUpperLimit);
-  std::mt19937 mt(GetRandomSeed());
+  std::mt19937 mt(seed);
   std::uniform_real_distribution<double> dist(lower_limit, upper_limit);
   for (auto &element: vector) { element.real(dist(mt)); element.imag(dist(mt)); }
 }
 
 // Specialized versions of the above for half-precision
 template <>
-void PopulateVector(std::vector<half> &vector) {
+void PopulateVector(std::vector<half> &vector, const unsigned int seed) {
   const auto lower_limit = static_cast<float>(kTestDataLowerLimit);
   const auto upper_limit = static_cast<float>(kTestDataUpperLimit);
-  std::mt19937 mt(GetRandomSeed());
+  std::mt19937 mt(seed);
   std::uniform_real_distribution<float> dist(lower_limit, upper_limit);
   for (auto &element: vector) { element = FloatToHalf(dist(mt)); }
 }
diff --git a/src/utilities.hpp b/src/utilities.hpp
index 75bd5a69..71bfc1af 100644
--- a/src/utilities.hpp
+++ b/src/utilities.hpp
@@ -219,7 +219,7 @@ constexpr auto kTestDataUpperLimit = 2.0;
 
 // Populates a vector with random data
 template <typename T>
-void PopulateVector(std::vector<T> &vector);
+void PopulateVector(std::vector<T> &vector, const unsigned int seed);
 
 // =================================================================================================