| // Copyright 2014 the V8 project 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 <cmath> |
| #include <limits> |
| |
| #include "src/heap/gc-tracer.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| TEST(GCTracer, AverageSpeed) { |
| RingBuffer<BytesAndDuration> buffer; |
| EXPECT_EQ(100 / 2, |
| GCTracer::AverageSpeed(buffer, MakeBytesAndDuration(100, 2), 0)); |
| buffer.Push(MakeBytesAndDuration(100, 8)); |
| EXPECT_EQ(100 / 2, |
| GCTracer::AverageSpeed(buffer, MakeBytesAndDuration(100, 2), 2)); |
| EXPECT_EQ(200 / 10, |
| GCTracer::AverageSpeed(buffer, MakeBytesAndDuration(100, 2), 3)); |
| const int max_speed = 1024 * MB; |
| buffer.Reset(); |
| buffer.Push(MakeBytesAndDuration(max_speed, 0.5)); |
| EXPECT_EQ(max_speed, |
| GCTracer::AverageSpeed(buffer, MakeBytesAndDuration(0, 0), 1)); |
| const int min_speed = 1; |
| buffer.Reset(); |
| buffer.Push(MakeBytesAndDuration(1, 10000)); |
| EXPECT_EQ(min_speed, |
| GCTracer::AverageSpeed(buffer, MakeBytesAndDuration(0, 0), 1)); |
| buffer.Reset(); |
| int sum = 0; |
| for (int i = 0; i < buffer.kSize; i++) { |
| sum += i + 1; |
| buffer.Push(MakeBytesAndDuration(i + 1, 1)); |
| } |
| EXPECT_EQ( |
| sum * 1.0 / buffer.kSize, |
| GCTracer::AverageSpeed(buffer, MakeBytesAndDuration(0, 0), buffer.kSize)); |
| buffer.Push(MakeBytesAndDuration(100, 1)); |
| EXPECT_EQ( |
| (sum * 1.0 - 1 + 100) / buffer.kSize, |
| GCTracer::AverageSpeed(buffer, MakeBytesAndDuration(0, 0), buffer.kSize)); |
| } |
| |
| } // namespace internal |
| } // namespace v8 |