1 /*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specic language governing permissions and
14 * limitations under the License.
15 */
16
17 #define ATRACE_TAG (ATRACE_TAG_POWER | ATRACE_TAG_HAL)
18 #define LOG_TAG "libperfmgr"
19
20 #include "perfmgr/PropertyNode.h"
21
22 #include <android-base/file.h>
23 #include <android-base/logging.h>
24 #include <android-base/properties.h>
25 #include <android-base/stringprintf.h>
26 #include <android-base/strings.h>
27 #include <utils/Trace.h>
28
29 namespace android {
30 namespace perfmgr {
31
PropertyNode(std::string name,std::string node_path,std::vector<RequestGroup> req_sorted,std::size_t default_val_index,bool reset_on_init)32 PropertyNode::PropertyNode(std::string name, std::string node_path,
33 std::vector<RequestGroup> req_sorted,
34 std::size_t default_val_index, bool reset_on_init)
35 : Node(std::move(name), std::move(node_path), std::move(req_sorted),
36 default_val_index, reset_on_init) {}
37
Update(bool)38 std::chrono::milliseconds PropertyNode::Update(bool) {
39 std::size_t value_index = default_val_index_;
40 std::chrono::milliseconds expire_time = std::chrono::milliseconds::max();
41
42 // Find the highest outstanding request's expire time
43 for (std::size_t i = 0; i < req_sorted_.size(); i++) {
44 if (req_sorted_[i].GetExpireTime(&expire_time)) {
45 value_index = i;
46 break;
47 }
48 }
49
50 // Update node only if request index changes
51 if (value_index != current_val_index_ || reset_on_init_) {
52 const std::string& req_value =
53 req_sorted_[value_index].GetRequestValue();
54 if (ATRACE_ENABLED()) {
55 const std::string tag = GetName() + ":" + req_value;
56 ATRACE_BEGIN(tag.c_str());
57 }
58 if (!android::base::SetProperty(node_path_, req_value)) {
59 LOG(WARNING) << "Failed to set property to : " << node_path_
60 << " with value: " << req_value;
61 } else {
62 // Update current index only when succeed
63 current_val_index_ = value_index;
64 reset_on_init_ = false;
65 }
66 if (ATRACE_ENABLED()) {
67 ATRACE_END();
68 }
69 }
70 return expire_time;
71 }
72
DumpToFd(int fd) const73 void PropertyNode::DumpToFd(int fd) const {
74 std::string node_value = android::base::GetProperty(node_path_, "");
75 std::string buf(android::base::StringPrintf(
76 "%s\t%s\t%zu\t%s\n", name_.c_str(), node_path_.c_str(),
77 current_val_index_, node_value.c_str()));
78 if (!android::base::WriteStringToFd(buf, fd)) {
79 LOG(ERROR) << "Failed to dump fd: " << fd;
80 }
81 for (std::size_t i = 0; i < req_sorted_.size(); i++) {
82 req_sorted_[i].DumpToFd(
83 fd, android::base::StringPrintf("\t\tReq%zu:\t", i));
84 }
85 }
86
87 } // namespace perfmgr
88 } // namespace android
89