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1 /*
2  *  Copyright (c) 2018 The WebM project authors. All Rights Reserved.
3  *
4  *  Use of this source code is governed by a BSD-style license
5  *  that can be found in the LICENSE file in the root of the source
6  *  tree. An additional intellectual property rights grant can be found
7  *  in the file PATENTS.  All contributing project authors may
8  *  be found in the AUTHORS file in the root of the source tree.
9  */
10 
11 #include <stdio.h>
12 #include <algorithm>
13 
14 #include "test/bench.h"
15 #include "vpx_ports/vpx_timer.h"
16 
RunNTimes(int n)17 void AbstractBench::RunNTimes(int n) {
18   for (int r = 0; r < VPX_BENCH_ROBUST_ITER; r++) {
19     vpx_usec_timer timer;
20     vpx_usec_timer_start(&timer);
21     for (int j = 0; j < n; ++j) {
22       Run();
23     }
24     vpx_usec_timer_mark(&timer);
25     times_[r] = static_cast<int>(vpx_usec_timer_elapsed(&timer));
26   }
27 }
28 
PrintMedian(const char * title)29 void AbstractBench::PrintMedian(const char *title) {
30   std::sort(times_, times_ + VPX_BENCH_ROBUST_ITER);
31   const int med = times_[VPX_BENCH_ROBUST_ITER >> 1];
32   int sad = 0;
33   for (int t = 0; t < VPX_BENCH_ROBUST_ITER; t++) {
34     sad += abs(times_[t] - med);
35   }
36   printf("[%10s] %s %.1f ms ( ±%.1f ms )\n", "BENCH ", title, med / 1000.0,
37          sad / (VPX_BENCH_ROBUST_ITER * 1000.0));
38 }
39