1 files changed, 51 insertions, 0 deletions
diff --git a/src/boost/libs/compute/perf/perf_thrust_rotate.cu b/src/boost/libs/compute/perf/perf_thrust_rotate.cu
new file mode 100644
index 00000000..108bb99b
--- /dev/null
+++ b/src/boost/libs/compute/perf/perf_thrust_rotate.cu
@@ -0,0 +1,51 @@
+//---------------------------------------------------------------------------//
+// Copyright (c) 2013-2014 Kyle Lutz <kyle.r.lutz@gmail.com>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+// See http://boostorg.github.com/compute for more information.
+//---------------------------------------------------------------------------//
+
+#include <algorithm>
+#include <cstdlib>
+#include <iostream>
+
+#include <thrust/copy.h>
+#include <thrust/device_vector.h>
+#include <thrust/host_vector.h>
+
+#include "perf.hpp"
+
+int main(int argc, char *argv[])
+{
+    perf_parse_args(argc, argv);
+
+    std::cout << "size: " << PERF_N << std::endl;
+    thrust::host_vector<int> h_vec = generate_random_vector<int>(PERF_N);
+
+    // transfer data to the device
+    thrust::device_vector<int> d_vec;
+
+    size_t rotate_distance = PERF_N / 2;
+
+    perf_timer t;
+    for(size_t trial = 0; trial < PERF_TRIALS; trial++){
+        d_vec = h_vec;
+
+        t.start();
+        // there is no thrust::rotate() so we implement it manually with copy()
+        thrust::device_vector<int> tmp(d_vec.begin(), d_vec.begin() + rotate_distance);
+        thrust::copy(d_vec.begin() + rotate_distance, d_vec.end(), d_vec.begin());
+        thrust::copy(tmp.begin(), tmp.end(), d_vec.begin() + rotate_distance);
+        cudaDeviceSynchronize();
+        t.stop();
+    }
+    std::cout << "time: " << t.min_time() / 1e6 << " ms" << std::endl;
+
+    // transfer data back to host
+    thrust::copy(d_vec.begin(), d_vec.end(), h_vec.begin());
+
+    return 0;
+}