pidpersec(8) System Manager's Manual pidpersec(8)
NAME
pidpersec - Count new processes (via fork()). Uses Linux eBPF/bcc.
SYNOPSIS
pidpersec
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 kernel sched_fork() function using dynamic
tracing, and will need updating to match any changes to this function.
Since this uses BPF, only the root user can use this tool.
REQUIREMENTS
CONFIG_BPF and bcc.
EXAMPLES
Count new processes created each second:
# pidpersec
OVERHEAD
This traces the kernel fork function, 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 bcc.
https://github.com/iovisor/bcc
Also look in the bcc distribution for a companion _examples.txt file
containing example usage, output, and commentary for this tool.
OS
Linux
STABILITY
Unstable - in development.
AUTHOR
Brendan Gregg
SEE ALSO
top(1)
USER COMMANDS 2015-08-18 pidpersec(8)
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