android cpu affinity

暂时无法获取当前线程运行在哪个CPU上，待调查...

int omask = 0;

int nmask = 0xF0;

static void affinity() {

    int err;

    int syscallres = syscall(__NR_sched_getaffinity, gettid(), sizeof(omask), &omask);

    if (syscallres) {

        err = errno;

        LOGE("Error in the syscall getaffinity: omask=%d=0x%x err=%d=0x%x", omask, omask, err, err);

    }

    LOGE("before-get affinity success, tid = %d , mask = ", gettid(), omask);

    syscallres = syscall(__NR_sched_setaffinity, gettid(), sizeof(nmask), &nmask);

    if (syscallres) {

        err = errno;

        LOGE("Error in the syscall setaffinity: nmask=%d=0x%x err=%d=0x%x", nmask, nmask, err, err);

    }

    syscallres = syscall(__NR_sched_getaffinity, gettid(), sizeof(omask), &omask);

    if (syscallres) {

        err = errno;

        LOGE("Error in the syscall getaffinity: omask=%d=0x%x err=%d=0x%x", omask, omask, err, err);

    }

    LOGE("after-get affinity success, tid = %d , mask = ", gettid(), omask);

}