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增加 syscall(__NR_sched_setaffinity). 

Signed-off-by: rick.chan <chenyang@autoai.com>
This commit is contained in:
rick.chan 2021-06-07 16:31:39 +08:00
parent 73848bd3d1
commit 2cecefab7e
1 changed files with 17 additions and 0 deletions
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17
Software/Development/System/Linux/User/API/Linux_进程_线程与_CPU_的亲和性(Affinity).md
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@ -261,3 +261,20 @@ this thread 2812323584 is running in processor 1
this thread 2812323584 is running in processor 2 this thread 2812323584 is running in processor 2
this thread 2812323584 is running in processor 3 this thread 2812323584 is running in processor 3
``` ```
## 4.Android 系统的特殊说明
Android 系统屏蔽了 pthread_setaffinity_np() 函数，需要通过 syscall(__NR_sched_setaffinity) 替代：
```cpp
void set_cur_thread_affinity(int mask) {
int err, syscallres;
pid_t pid = gettid();
syscallres = syscall(__NR_sched_setaffinity, pid, sizeof(mask), &mask);
if (syscallres) {
err = errno;
LOGE("Error in the syscall setaffinity: mask = %d, err=%d",mask,errno);
}
LOGD("tid = %d has setted affinity success",pid);
}
```