Port SincResampler's ConvolveBenchmark, as well as VectorMath's benchmarks to media_perftests.

media/base/vector_math_perftest.cc

+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/cpu.h"
+#include "base/memory/aligned_memory.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/time/time.h"
+#include "media/base/vector_math.h"
+#include "media/base/vector_math_testing.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/perf/perf_test.h"
+
+// Default test values.

[scherkus (not reviewing), 2013/10/29 02:16:51]

move these down to after kBenchmarkIterations

(even though they're static we should still keep the code in the media
namespace)

+static const float kScale = 0.5;
+static const float kInputFillValue = 1.0;
+static const float kOutputFillValue = 3.0;
+
+using base::TimeTicks;
+using std::fill;
+
+namespace media {
+
+static const int kBenchmarkIterations = 200000;
+
+class VectorMathPerfTest : public testing::Test {
+ public:
+  static const int kVectorSize = 8192;

[scherkus (not reviewing), 2013/10/29 02:16:51]

I'd move this out along w/ kScale -- there's no reason to keep this split out
from other benchmarking parameters

+
+  VectorMathPerfTest() {
+    // Initialize input and output vectors.
+    input_vector.reset(static_cast<float*>(base::AlignedAlloc(
+        sizeof(float) * kVectorSize, vector_math::kRequiredAlignment)));
+    output_vector.reset(static_cast<float*>(base::AlignedAlloc(
+        sizeof(float) * kVectorSize, vector_math::kRequiredAlignment)));
+  }
+
+  void FillTestVectors(float input, float output) {

[scherkus (not reviewing), 2013/10/29 02:16:51]

unless there's a good reason to keep around, being a performance test we're not
actually verifying the inputs and outputs (the unit tests do that)

we can simplify a lot of this by doing the following:
  1) Remove k{Input,Output}FillValue and use a value like 0.0 or 1.0
  2) Move fill() calls into ctor after constructing
  3) Remove cal to FillTestVectors() in RunBenchmark()

+    // Setup input and output vectors.
+    fill(input_vector.get(), input_vector.get() + kVectorSize, input);
+    fill(output_vector.get(), output_vector.get() + kVectorSize, output);
+  }
+
+  void RunBenchmark(void (*fn)(const float[], float, int, float[]),
+                    bool aligned,
+                    const std::string& test_name,
+                    const std::string& trace_name) {
+    FillTestVectors(kInputFillValue, kOutputFillValue);
+    TimeTicks start = TimeTicks::HighResNow();
+    for (int i = 0; i < kBenchmarkIterations; ++i) {
+      fn(input_vector.get(),
+         kScale,
+         kVectorSize - (aligned ? 0 : 1),
+         output_vector.get());
+    }
+    double total_time_seconds = (TimeTicks::HighResNow() - start).InSecondsF();
+    perf_test::PrintResult(test_name,
+                           "",
+                           trace_name,
+                           kBenchmarkIterations / total_time_seconds,
+                           "runs/s",
+                           true);
+  }
+
+ protected:
+  scoped_ptr_malloc<float, base::ScopedPtrAlignedFree> input_vector;

[scherkus (not reviewing), 2013/10/29 02:16:51]

being member variables they should have a _ suffix (e.g., input_vector_)

+  scoped_ptr_malloc<float, base::ScopedPtrAlignedFree> output_vector;
+
+  DISALLOW_COPY_AND_ASSIGN(VectorMathPerfTest);
+};
+
+// Define platform independent function name for FMAC* perf tests.
+#if defined(ARCH_CPU_X86_FAMILY)
+#define FMAC_FUNC FMAC_SSE
+#elif defined(ARCH_CPU_ARM_FAMILY) && defined(USE_NEON)
+#define FMAC_FUNC FMAC_NEON
+#endif
+
+// Benchmark for each optimized vector_math::FMAC() method.
+TEST_F(VectorMathPerfTest, FMAC) {
+  // Benchmark FMAC_C().
+  RunBenchmark(
+      vector_math::FMAC_C, true, "vector_math_fmac", "unoptimized");
+#if defined(FMAC_FUNC)
+#if defined(ARCH_CPU_X86_FAMILY)
+  ASSERT_TRUE(base::CPU().has_sse());
+#endif
+  // Benchmark FMAC_FUNC() with unaligned size.
+  ASSERT_NE((kVectorSize - 1) % (vector_math::kRequiredAlignment /
+                                 sizeof(float)), 0U);
+  RunBenchmark(
+      vector_math::FMAC_FUNC, false, "vector_math_fmac", "optimized_unaligned");
+  // Benchmark FMAC_FUNC() with aligned size.
+  ASSERT_EQ(kVectorSize % (vector_math::kRequiredAlignment / sizeof(float)),
+            0U);
+  RunBenchmark(
+      vector_math::FMAC_FUNC, true, "vector_math_fmac", "optimized_aligned");
+#endif
+}
+
+#undef FMAC_FUNC
+
+// Define platform independent function name for FMULBenchmark* tests.
+#if defined(ARCH_CPU_X86_FAMILY)
+#define FMUL_FUNC FMUL_SSE
+#elif defined(ARCH_CPU_ARM_FAMILY) && defined(USE_NEON)
+#define FMUL_FUNC FMUL_NEON
+#endif
+
+// Benchmark for each optimized vector_math::FMUL() method.
+TEST_F(VectorMathPerfTest, FMUL) {
+  // Benchmark FMUL_C().
+  RunBenchmark(
+      vector_math::FMUL_C, true, "vector_math_fmul", "unoptimized");
+#if defined(FMUL_FUNC)
+#if defined(ARCH_CPU_X86_FAMILY)
+  ASSERT_TRUE(base::CPU().has_sse());
+#endif
+  // Benchmark FMUL_FUNC() with unaligned size.
+  ASSERT_NE((kVectorSize - 1) % (vector_math::kRequiredAlignment /
+                                 sizeof(float)), 0U);
+  RunBenchmark(
+      vector_math::FMUL_FUNC, false, "vector_math_fmac", "optimized_unaligned");
+  // Benchmark FMUL_FUNC() with aligned size.
+  ASSERT_EQ(kVectorSize % (vector_math::kRequiredAlignment / sizeof(float)),
+            0U);
+  RunBenchmark(
+      vector_math::FMUL_FUNC, true, "vector_math_fmac", "optimized_aligned");
+#endif
+}
+
+#undef FMUL_FUNC
+
+} // namespace media