1 /*
2 * Copyright (c) 2022 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 <string>
17 #include <sstream>
18 #include "memmgr_log.h"
19 #include "kernel_interface.h"
20 #include "oom_score_adj_utils.h"
21
22 namespace OHOS {
23 namespace Memory {
24 namespace {
25 const std::string TAG = "ReclaimPriorityManager";
26 }
27
WriteOomScoreAdjToKernel(std::shared_ptr<BundlePriorityInfo> bundle)28 bool OomScoreAdjUtils::WriteOomScoreAdjToKernel(std::shared_ptr<BundlePriorityInfo> bundle)
29 {
30 HILOGD("called");
31 if (bundle == nullptr) {
32 return false;
33 }
34 for (auto i = bundle->procs_.begin(); i != bundle->procs_.end(); ++i) {
35 int priority = i->second.priority_;
36 pid_t pid = i->second.pid_;
37 std::stringstream ss;
38 ss << "/proc/" << pid << "/oom_score_adj";
39 std::string path = ss.str();
40 std::string content = std::to_string(priority);
41 HILOGD("prepare to echo %{public}s > %{public}s", content.c_str(), path.c_str());
42 KernelInterface::GetInstance().EchoToPath(path.c_str(), content.c_str());
43 }
44 return true;
45 }
46
WriteOomScoreAdjToKernel(pid_t pid,int priority)47 bool OomScoreAdjUtils::WriteOomScoreAdjToKernel(pid_t pid, int priority)
48 {
49 HILOGD("called");
50 std::stringstream ss;
51 ss << "/proc/" << pid << "/oom_score_adj";
52 std::string path = ss.str();
53 std::string content = std::to_string(priority);
54 HILOGD("prepare to echo %{public}s > %{public}s", content.c_str(), path.c_str());
55 KernelInterface::GetInstance().EchoToPath(path.c_str(), content.c_str());
56 return true;
57 }
58 } // namespace Memory
59 } // namespace OHOS
60