1 files changed, 70 insertions, 0 deletions
diff --git a/tests/framework/instruments/InstrumentsStats.cpp b/tests/framework/instruments/InstrumentsStats.cpp
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+++ b/tests/framework/instruments/InstrumentsStats.cpp
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+/*
+ * Copyright (c) 2018 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include "InstrumentsStats.h"
+
+namespace arm_compute
+{
+namespace test
+{
+namespace framework
+{
+InstrumentsStats::InstrumentsStats(const std::vector<Measurement> &measurements)
+    : _min(nullptr), _max(nullptr), _median(nullptr), _mean(measurements.begin()->value().is_floating_point), _stddev(0.0)
+{
+    auto cmp_measurements = [](const Measurement & a, const Measurement & b)
+    {
+        return a.value() < b.value();
+    };
+
+    auto add_measurements = [](Measurement::Value a, const Measurement & b)
+    {
+        return a + b.value();
+    };
+
+    //Calculate min & max
+    const auto values = std::minmax_element(measurements.begin(), measurements.end(), cmp_measurements);
+    _min              = &(*values.first);
+    _max              = &(*values.second);
+
+    // Calculate the median value
+    auto copy = measurements;
+    std::nth_element(copy.begin(), copy.begin() + (copy.size() / 2), copy.end(), cmp_measurements);
+    _median = &copy[copy.size() / 2];
+
+    Measurement::Value sum_values = std::accumulate(measurements.begin(), measurements.end(), Measurement::Value(_min->value().is_floating_point), add_measurements);
+
+    // Calculate the relative standard deviation
+    _mean = sum_values / measurements.size();
+    std::vector<Measurement::Value> diff(measurements.size(), _min->value().is_floating_point);
+    std::transform(measurements.begin(), measurements.end(), diff.begin(), [&](const Measurement & x)
+    {
+        return x.value() - _mean;
+    });
+    auto sq_sum   = std::inner_product(diff.begin(), diff.end(), diff.begin(), Measurement::Value(_min->value().is_floating_point));
+    auto variance = sq_sum / measurements.size();
+    _stddev       = Measurement::Value::relative_standard_deviation(variance, _mean);
+}
+} // namespace framework
+} // namespace test
+} // namespace arm_compute