27464 gettid() = 27464 27464 +++ exited with 0 +++ 27462 --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=27464, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- 27466 gettid() = 2 /* 27466 in strace's PID NS */ 27466 +++ exited with 0 +++ 27462 --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=27466, si_uid=65534, si_status=0, si_utime=0, si_stime=0} --- 27476 gettid() = 3 /* 27476 in strace's PID NS */ 27476 +++ exited with 0 +++ 27462 --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=27476, si_uid=65534, si_status=0, si_utime=0, si_stime=0} --- 27484 gettid() = 4 /* 27484 in strace's PID NS */ 27484 +++ exited with 0 +++ 27462 --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=27484, si_uid=65534, si_status=0, si_utime=0, si_stime=0} --- 27490 gettid() = 5 /* 27490 in strace's PID NS */ 27490 +++ exited with 0 +++ 27462 --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=27490, si_uid=65534, si_status=0, si_utime=0, si_stime=0} --- 27462 +++ exited with 0 +++ 27465 +++ exited with 0 +++