7794  gettid() = 7794
7794  +++ exited with 0 +++
7799  gettid() = 2 /* 7799 in strace's PID NS */
7799  +++ exited with 0 +++
7809  gettid() = 3 /* 7809 in strace's PID NS */
7809  +++ exited with 0 +++
7818  gettid() = 4 /* 7818 in strace's PID NS */
7818  +++ exited with 0 +++
7829  gettid() = 5 /* 7829 in strace's PID NS */
7829  +++ exited with 0 +++
