6961  gettid() = 6961
6961  +++ exited with 0 +++
6963  gettid() = 2 /* 6963 in strace's PID NS */
6963  +++ exited with 0 +++
6964  gettid() = 3 /* 6964 in strace's PID NS */
6964  +++ exited with 0 +++
6965  gettid() = 4 /* 6965 in strace's PID NS */
6965  +++ exited with 0 +++
6966  gettid() = 5 /* 6966 in strace's PID NS */
6966  +++ exited with 0 +++
