1 files changed, 63 insertions, 0 deletions
diff --git a/src/boost/libs/compute/perf/perf_thrust_merge.cu b/src/boost/libs/compute/perf/perf_thrust_merge.cu
new file mode 100644
index 00000000..f269c939
--- /dev/null
+++ b/src/boost/libs/compute/perf/perf_thrust_merge.cu
@@ -0,0 +1,63 @@
+//---------------------------------------------------------------------------//
+// 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 <iostream>
+#include <iterator>
+#include <algorithm>
+
+#include <thrust/device_vector.h>
+#include <thrust/host_vector.h>
+#include <thrust/merge.h>
+#include <thrust/sort.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> v1(std::floor(PERF_N / 2.0));
+    thrust::host_vector<int> v2(std::ceil(PERF_N / 2.0));
+    std::generate(v1.begin(), v1.end(), rand);
+    std::generate(v2.begin(), v2.end(), rand);
+    std::sort(v1.begin(), v1.end());
+    std::sort(v2.begin(), v2.end());
+
+    // transfer data to the device
+    thrust::device_vector<int> gpu_v1 = v1;
+    thrust::device_vector<int> gpu_v2 = v2;
+    thrust::device_vector<int> gpu_v3(PERF_N);
+
+    perf_timer t;
+    for(size_t trial = 0; trial < PERF_TRIALS; trial++){
+        t.start();
+        thrust::merge(
+            gpu_v1.begin(), gpu_v1.end(),
+            gpu_v2.begin(), gpu_v2.end(),
+            gpu_v3.begin()
+        );
+        cudaDeviceSynchronize();
+        t.stop();
+    }
+    std::cout << "time: " << t.min_time() / 1e6 << " ms" << std::endl;
+
+    thrust::host_vector<int> check_v3 = gpu_v3;
+
+    thrust::host_vector<int> v3(PERF_N);
+    std::merge(v1.begin(), v1.end(), v2.begin(), v2.end(), v3.begin());
+    bool ok = std::equal(check_v3.begin(), check_v3.end(), v3.begin());
+    if(!ok){
+        std::cerr << "ERROR: merged ranges different" << std::endl;
+        return -1;
+    }
+
+    return 0;
+}