1 /*
2 * Copyright (c) 2024 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "ecmascript/mem/mem_controller_utils.h"
17
18 #include "ecmascript/mem/mem_common.h"
19
20 namespace panda::ecmascript {
21
CalculateAverageSpeed(const base::GCRingBuffer<BytesAndDuration, LENGTH> &buffer)22 double MemControllerUtils::CalculateAverageSpeed(const base::GCRingBuffer<BytesAndDuration, LENGTH> &buffer)
23 {
24 return CalculateAverageSpeed(buffer, MakeBytesAndDuration(0, 0), 0);
25 }
26
CalculateAverageSpeed(const base::GCRingBuffer<BytesAndDuration, LENGTH> &buffer, const BytesAndDuration &initial, const double timeMs)27 double MemControllerUtils::CalculateAverageSpeed(const base::GCRingBuffer<BytesAndDuration, LENGTH> &buffer,
28 const BytesAndDuration &initial, const double timeMs)
29 {
30 BytesAndDuration sum = buffer.Sum(
31 [timeMs](BytesAndDuration a, BytesAndDuration b) {
32 if (timeMs != 0 && a.second >= timeMs) {
33 return a;
34 }
35 return std::make_pair(a.first + b.first, a.second + b.second);
36 },
37 initial);
38 uint64_t bytes = sum.first;
39 double durations = sum.second;
40 if (fabs(durations) <= 1e-6) {
41 return 0;
42 }
43 double speed = bytes / durations;
44 const int maxSpeed = static_cast<int>(1_GB);
45 const int minSpeed = 1;
46 if (speed >= maxSpeed) {
47 return maxSpeed;
48 }
49 if (speed <= minSpeed) {
50 return minSpeed;
51 }
52 return speed;
53 }
54
55 }