More warm-up & kernel iterations

include/ck/host_utility/kernel_launch.hpp

@@ -29,12 +29,15 @@ float launch_and_time_kernel(const StreamConfig& stream_config,
                block_dim.y,
                block_dim.z);
 
-        const int nrepeat = 10;
+        const int nrepeat = 100;
 
-        printf("Warm up 1 time\n");
+        printf("Warm up 10 time\n");
 
         // warm up
-        kernel<<<grid_dim, block_dim, lds_byte, stream_config.stream_id_>>>(args...);
+        for(int i = 0; i < 10; ++i)
+        {
+            kernel<<<grid_dim, block_dim, lds_byte, stream_config.stream_id_>>>(args...);
+        }
 
         printf("Start running %d times...\n", nrepeat);