NAME

       pidpersec.bt - Count new processes (via fork()). Uses bpftrace/eBPF.

SYNOPSIS

       pidpersec.bt

DESCRIPTION

       pidpersec  shows how many new processes were created each second. There can be performance
       issues caused by many short-lived processes, which may not be visible  in  sampling  tools
       like top(1). pidpersec provides one way to investigate this behavior.

       This works by tracing the tracepoint:sched:sched_process_fork tracepoint.

       Since this uses BPF, only the root user can use this tool.

REQUIREMENTS

       CONFIG_BPF and bpftrace.

EXAMPLES

       Count new processes, printing per-second summaries until Ctrl-C is hit:
              # pidpersec.bt

FIELDS

       1st    Count of processes (after "@")

OVERHEAD

       This  traces  kernel  forks, and maintains an in-kernel count which is read asynchronously
       from user-space. As the rate of this is generally expected to  be  low  (<<  1000/s),  the
       overhead is also expected to be negligible.

SOURCE

       This is from bpftrace.

              https://github.com/iovisor/bpftrace

       Also  look  in  the  bpftrace  distribution  for a companion _examples.txt file containing
       example usage, output, and commentary for this tool.

       This is a bpftrace version of the bcc tool of the same name. The bcc tool may provide more
       options and customizations.

              https://github.com/iovisor/bcc

OS

       Linux

STABILITY

       Unstable - in development.

AUTHOR

       Brendan Gregg

SEE ALSO

       top(1)