media/base/vector_math_perftest.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/memory/aligned_memory.h"
   6 #include "base/memory/scoped_ptr.h"
   7 #include "base/time/time.h"
   8 #include "media/base/vector_math.h"
   9 #include "media/base/vector_math_testing.h"
  10 #include "testing/gtest/include/gtest/gtest.h"
  11 #include "testing/perf/perf_test.h"
  12
  13 using base::TimeTicks;
  14 using std::fill;
  15
  16 namespace media {
  17
  18 static const int kBenchmarkIterations = 200000;
  19 static const int kEWMABenchmarkIterations = 50000;
  20 static const float kScale = 0.5;
  21 static const int kVectorSize = 8192;
  22
  23 class VectorMathPerfTest : public testing::Test {
  24  public:
  25   VectorMathPerfTest() {
  26     // Initialize input and output vectors.
  27     input_vector_.reset(static_cast<float*>(base::AlignedAlloc(
  28         sizeof(float) * kVectorSize, vector_math::kRequiredAlignment)));
  29     output_vector_.reset(static_cast<float*>(base::AlignedAlloc(
  30         sizeof(float) * kVectorSize, vector_math::kRequiredAlignment)));
  31     fill(input_vector_.get(), input_vector_.get() + kVectorSize, 1.0f);
  32     fill(output_vector_.get(), output_vector_.get() + kVectorSize, 0.0f);
  33   }
  34
  35   void RunBenchmark(void (*fn)(const float[], float, int, float[]),
  36                     bool aligned,
  37                     const std::string& test_name,
  38                     const std::string& trace_name) {
  39     TimeTicks start = TimeTicks::HighResNow();
  40     for (int i = 0; i < kBenchmarkIterations; ++i) {
  41       fn(input_vector_.get(),
  42          kScale,
  43          kVectorSize - (aligned ? 0 : 1),
  44          output_vector_.get());
  45     }
  46     double total_time_milliseconds =
  47         (TimeTicks::HighResNow() - start).InMillisecondsF();
  48     perf_test::PrintResult(test_name,
  49                            "",
  50                            trace_name,
  51                            kBenchmarkIterations / total_time_milliseconds,
  52                            "runs/ms",
  53                            true);
  54   }
  55
  56   void RunBenchmark(
  57       std::pair<float, float> (*fn)(float, const float[], int, float),
  58       int len,
  59       const std::string& test_name,
  60       const std::string& trace_name) {
  61     TimeTicks start = TimeTicks::HighResNow();
  62     for (int i = 0; i < kEWMABenchmarkIterations; ++i) {
  63       fn(0.5f, input_vector_.get(), len, 0.1f);
  64     }
  65     double total_time_milliseconds =
  66         (TimeTicks::HighResNow() - start).InMillisecondsF();
  67     perf_test::PrintResult(test_name,
  68                            "",
  69                            trace_name,
  70                            kEWMABenchmarkIterations / total_time_milliseconds,
  71                            "runs/ms",
  72                            true);
  73   }
  74
  75  protected:
  76   scoped_ptr<float, base::AlignedFreeDeleter> input_vector_;
  77   scoped_ptr<float, base::AlignedFreeDeleter> output_vector_;
  78
  79   DISALLOW_COPY_AND_ASSIGN(VectorMathPerfTest);
  80 };
  81
  82 // Define platform dependent function names for SIMD optimized methods.
  83 #if defined(ARCH_CPU_X86_FAMILY)
  84 #define FMAC_FUNC FMAC_SSE
  85 #define FMUL_FUNC FMUL_SSE
  86 #define EWMAAndMaxPower_FUNC EWMAAndMaxPower_SSE
  87 #elif defined(ARCH_CPU_ARM_FAMILY) && defined(USE_NEON)
  88 #define FMAC_FUNC FMAC_NEON
  89 #define FMUL_FUNC FMUL_NEON
  90 #define EWMAAndMaxPower_FUNC EWMAAndMaxPower_NEON
  91 #endif
  92
  93 // Benchmark for each optimized vector_math::FMAC() method.
  94 TEST_F(VectorMathPerfTest, FMAC) {
  95   // Benchmark FMAC_C().
  96   RunBenchmark(
  97       vector_math::FMAC_C, true, "vector_math_fmac", "unoptimized");
  98 #if defined(FMAC_FUNC)
  99   // Benchmark FMAC_FUNC() with unaligned size.
 100   ASSERT_NE((kVectorSize - 1) % (vector_math::kRequiredAlignment /
 101                                  sizeof(float)), 0U);
 102   RunBenchmark(
 103       vector_math::FMAC_FUNC, false, "vector_math_fmac", "optimized_unaligned");
 104   // Benchmark FMAC_FUNC() with aligned size.
 105   ASSERT_EQ(kVectorSize % (vector_math::kRequiredAlignment / sizeof(float)),
 106             0U);
 107   RunBenchmark(
 108       vector_math::FMAC_FUNC, true, "vector_math_fmac", "optimized_aligned");
 109 #endif
 110 }
 111
 112 // Benchmark for each optimized vector_math::FMUL() method.
 113 TEST_F(VectorMathPerfTest, FMUL) {
 114   // Benchmark FMUL_C().
 115   RunBenchmark(
 116       vector_math::FMUL_C, true, "vector_math_fmul", "unoptimized");
 117 #if defined(FMUL_FUNC)
 118   // Benchmark FMUL_FUNC() with unaligned size.
 119   ASSERT_NE((kVectorSize - 1) % (vector_math::kRequiredAlignment /
 120                                  sizeof(float)), 0U);
 121   RunBenchmark(
 122       vector_math::FMUL_FUNC, false, "vector_math_fmul", "optimized_unaligned");
 123   // Benchmark FMUL_FUNC() with aligned size.
 124   ASSERT_EQ(kVectorSize % (vector_math::kRequiredAlignment / sizeof(float)),
 125             0U);
 126   RunBenchmark(
 127       vector_math::FMUL_FUNC, true, "vector_math_fmul", "optimized_aligned");
 128 #endif
 129 }
 130
 131 // Benchmark for each optimized vector_math::EWMAAndMaxPower() method.
 132 TEST_F(VectorMathPerfTest, EWMAAndMaxPower) {
 133   // Benchmark EWMAAndMaxPower_C().
 134   RunBenchmark(vector_math::EWMAAndMaxPower_C,
 135                kVectorSize,
 136                "vector_math_ewma_and_max_power",
 137                "unoptimized");
 138 #if defined(EWMAAndMaxPower_FUNC)
 139   // Benchmark EWMAAndMaxPower_FUNC() with unaligned size.
 140   ASSERT_NE((kVectorSize - 1) % (vector_math::kRequiredAlignment /
 141                                  sizeof(float)), 0U);
 142   RunBenchmark(vector_math::EWMAAndMaxPower_FUNC,
 143                kVectorSize - 1,
 144                "vector_math_ewma_and_max_power",
 145                "optimized_unaligned");
 146   // Benchmark EWMAAndMaxPower_FUNC() with aligned size.
 147   ASSERT_EQ(kVectorSize % (vector_math::kRequiredAlignment / sizeof(float)),
 148             0U);
 149   RunBenchmark(vector_math::EWMAAndMaxPower_FUNC,
 150                kVectorSize,
 151                "vector_math_ewma_and_max_power",
 152                "optimized_aligned");
 153 #endif
 154 }
 155
 156 } // namespace media