I found a new word "per" in some of the records of my audit.log.

Any idea of why this happened and what it means ?

type=SYSCALL msg=audit(1571245536.351:43593): arch=c000003e syscall=3 per=40000 success=yes exit=0 a0=5 a1=5 a2=556213b6d6bc a3=7f483b98bcc0 items=0 ppid=2653 pid=2655 auid=1000 uid=1000 gid=1000 euid=1000 suid=1000 fsuid=1000 egid=1000 sgid=1000 fsgid=1000 tty=pts1 ses=3 comm="gdb" exe="/usr/bin/gdb" key=(null)

Thank you :)