Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1 | // Copyright 2014 the V8 project 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 <cmath> |
| 6 | #include <limits> |
| 7 | |
| 8 | #include "src/heap/gc-tracer.h" |
| 9 | #include "testing/gtest/include/gtest/gtest.h" |
| 10 | |
| 11 | namespace v8 { |
| 12 | namespace internal { |
| 13 | |
| 14 | TEST(GCTracer, AverageSpeed) { |
| 15 | RingBuffer<BytesAndDuration> buffer; |
| 16 | EXPECT_EQ(100 / 2, |
| 17 | GCTracer::AverageSpeed(buffer, MakeBytesAndDuration(100, 2), 0)); |
| 18 | buffer.Push(MakeBytesAndDuration(100, 8)); |
| 19 | EXPECT_EQ(100 / 2, |
| 20 | GCTracer::AverageSpeed(buffer, MakeBytesAndDuration(100, 2), 2)); |
| 21 | EXPECT_EQ(200 / 10, |
| 22 | GCTracer::AverageSpeed(buffer, MakeBytesAndDuration(100, 2), 3)); |
| 23 | const int max_speed = 1024 * MB; |
| 24 | buffer.Reset(); |
| 25 | buffer.Push(MakeBytesAndDuration(max_speed, 0.5)); |
| 26 | EXPECT_EQ(max_speed, |
| 27 | GCTracer::AverageSpeed(buffer, MakeBytesAndDuration(0, 0), 1)); |
| 28 | const int min_speed = 1; |
| 29 | buffer.Reset(); |
| 30 | buffer.Push(MakeBytesAndDuration(1, 10000)); |
| 31 | EXPECT_EQ(min_speed, |
| 32 | GCTracer::AverageSpeed(buffer, MakeBytesAndDuration(0, 0), 1)); |
| 33 | buffer.Reset(); |
| 34 | int sum = 0; |
| 35 | for (int i = 0; i < buffer.kSize; i++) { |
| 36 | sum += i + 1; |
| 37 | buffer.Push(MakeBytesAndDuration(i + 1, 1)); |
| 38 | } |
| 39 | EXPECT_EQ( |
| 40 | sum * 1.0 / buffer.kSize, |
| 41 | GCTracer::AverageSpeed(buffer, MakeBytesAndDuration(0, 0), buffer.kSize)); |
| 42 | buffer.Push(MakeBytesAndDuration(100, 1)); |
| 43 | EXPECT_EQ( |
| 44 | (sum * 1.0 - 1 + 100) / buffer.kSize, |
| 45 | GCTracer::AverageSpeed(buffer, MakeBytesAndDuration(0, 0), buffer.kSize)); |
| 46 | } |
| 47 | |
| 48 | } // namespace internal |
| 49 | } // namespace v8 |