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 "cpu_utils.h"
17
18 #include <cerrno>
19 #include <sched.h>
20 #include <unistd.h>
21
22 #include "media_log.h"
23
24 namespace OHOS {
25 namespace Media {
SlowDown()26 void SlowDown()
27 {
28 cpu_set_t cpuSet;
29 CPU_ZERO(&cpuSet);
30 for (int cpu = CPU_IDX_0; cpu <= CPU_IDX_6; cpu++) {
31 CPU_SET(cpu, &cpuSet);
32 }
33 if (sched_setaffinity(0, sizeof(cpuSet), &cpuSet) < 0) {
34 MEDIA_ERR_LOG("set thread affinity failed, errno %{public}d", errno);
35 }
36 }
37
ResetCpu()38 void ResetCpu()
39 {
40 cpu_set_t cpuSet;
41 CPU_ZERO(&cpuSet);
42
43 if (sched_setaffinity(0, sizeof(cpuSet), &cpuSet) < 0) {
44 MEDIA_ERR_LOG("set thread affinity failed, errno %{public}d", errno);
45 return;
46 }
47 }
48 } // namespace Media
49 } // namespace OHOS
50