Adding upstream version 14.2.21.upstream/14.2.21upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 93 insertions, 0 deletions

diff --git a/src/boost/libs/compute/perf/perf_max_element.cpp b/src/boost/libs/compute/perf/perf_max_element.cpp
new file mode 100644
index 00000000..0e47c67e
--- /dev/null
+++ b/src/boost/libs/compute/perf/perf_max_element.cpp
@@ -0,0 +1,93 @@
+//---------------------------------------------------------------------------//
+// Copyright (c) 2013-2014 Rastko Anicic <anicic.rastko@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/max_element.hpp>
+#include <boost/compute/container/vector.hpp>
+
+#include "perf.hpp"
+
+int rand_int()
+{
+    return static_cast<int>(rand() % 10000000);
+}
+
+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
+    );
+
+    boost::compute::vector<int>::iterator device_max_iter
+        = device_vector.begin();
+
+    perf_timer t;
+    for(size_t trial = 0; trial < PERF_TRIALS; trial++){
+        t.start();
+        device_max_iter = boost::compute::max_element(
+            device_vector.begin(), device_vector.end(), queue
+        );
+        queue.finish();
+        t.stop();
+    }
+
+    int device_max = device_max_iter.read(queue);
+    std::cout << "time: " << t.min_time() / 1e6 << " ms" << std::endl;
+    std::cout << "max: " << device_max << std::endl;
+
+    // verify max is correct
+    std::vector<int>::iterator host_max_iter
+        = std::max_element(host_vector.begin(), host_vector.end());
+
+    int host_max = *host_max_iter;
+    if(device_max != host_max){
+         std::cout << "ERROR: "
+                   << "device_max (" << device_max << ") "
+                   << "!= "
+                   << "host_max (" << host_max << ")"
+                   << std::endl;
+         return -1;
+    }
+
+    size_t host_max_idx = std::distance(host_vector.begin(), host_max_iter);
+    size_t device_max_idx = std::distance(device_vector.begin(), device_max_iter);
+    if(device_max_idx != host_max_idx){
+        std::cout << "ERROR: "
+                  << "device_max index (" << device_max_idx << ") "
+                  << "!= "
+                  << "host_max index (" << host_max_idx << ")"
+                  << std::endl;
+        return -1;
+    }
+
+    return 0;
+}