     //the size of the thread groups (must be available at compile time)
     static constexpr index_t group_size = 16;
     //output verbosity (must be available at compile time)
-    static constexpr index_t verbosity = 1;
+    static constexpr index_t verbosity = 0;
     //filename for test data (dumped with binary_io.h)
     const string  filename = argv[1];
     //length of test data


    using namespace warpdrive;
    using namespace std;

    cout << "================= WARPDRIVE ================" << endl;

    if (argc < 9)
    {

    data_t * data_d; cudaMalloc(&data_d, sizeof(data_t)*len_data); CUERR

    //TESTS/BENCHMARKS
    if (verbosity > 0)
    {
        cout << "============= TESTS/BENCHMARK =============" << endl;
    }

    //init failure handler
    failure_p failure_handler = failure_p();
