1 files changed, 88 insertions, 0 deletions
diff --git a/src/boost/libs/compute/perf/perf_find.cpp b/src/boost/libs/compute/perf/perf_find.cpp
new file mode 100644
index 00000000..3cfb75ad
--- /dev/null
+++ b/src/boost/libs/compute/perf/perf_find.cpp
@@ -0,0 +1,88 @@
+//---------------------------------------------------------------------------//
+// Copyright (c) 2015 Jakub Szuppe <j.szuppe@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 <iostream>
+#include <vector>
+
+#include <boost/compute/system.hpp>
+#include <boost/compute/algorithm/find.hpp>
+#include <boost/compute/container/vector.hpp>
+
+#include "perf.hpp"
+
+// Max integer that can be generated by rand_int() function.
+int rand_int_max = 25;
+
+int rand_int()
+{
+    return static_cast<int>((rand() / double(RAND_MAX)) * rand_int_max);
+}
+
+int main(int argc, char *argv[])
+{
+    perf_parse_args(argc, argv);
+    std::cout << "size: " << PERF_N << std::endl;
+
+    // setup context and queue for the default device
+    boost::compute::device device = boost::compute::system::default_device();
+    boost::compute::context context(device);
+    boost::compute::command_queue queue(context, device);
+    std::cout << "device: " << device.name() << std::endl;
+
+    // create vector of random numbers on the host
+    std::vector<int> host_vector(PERF_N);
+    std::generate(host_vector.begin(), host_vector.end(), rand_int);
+
+    // create vector on the device and copy the data
+    boost::compute::vector<int> device_vector(PERF_N, context);
+    boost::compute::copy(
+        host_vector.begin(),
+        host_vector.end(),
+        device_vector.begin(),
+        queue
+    );
+
+    // trying to find element that isn't in vector (worst-case scenario)
+    int wanted = rand_int_max + 1;
+
+    // device iterator
+    boost::compute::vector<int>::iterator device_result_it;
+
+    perf_timer t;
+    for(size_t trial = 0; trial < PERF_TRIALS; trial++){
+        t.start();
+        device_result_it = boost::compute::find(device_vector.begin(),
+                                                device_vector.end(),
+                                                wanted,
+                                                queue);
+        queue.finish();
+        t.stop();
+    }
+    std::cout << "time: " << t.min_time() / 1e6 << " ms" << std::endl;
+
+    // verify if found index is correct by comparing it with std::find() result
+    size_t host_result_index = std::distance(host_vector.begin(),
+                                             std::find(host_vector.begin(),
+                                                       host_vector.end(),
+                                                       wanted));
+    size_t device_result_index = device_result_it.get_index();
+
+    if(device_result_index != host_result_index){
+        std::cout << "ERROR: "
+                  << "device_result_index (" << device_result_index << ") "
+                  << "!= "
+                  << "host_result_index (" << host_result_index << ")"
+                  << std::endl;
+        return -1;
+    }
+
+    return 0;
+}