bcc-pidpersec(8)

1pidpersec(8)                System Manager's Manual               pidpersec(8)
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NAME

6       pidpersec - Count new processes (via fork()). Uses Linux eBPF/bcc.
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SYNOPSIS

9       pidpersec
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DESCRIPTION

12       pidpersec  shows how many new processes were created each second. There
13       can be performance issues caused by many short-lived  processes,  which
14       may  not  be  visible in sampling tools like top(1). pidpersec provides
15       one way to investigate this behavior.
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17       This works by tracing the kernel sched_fork()  function  using  dynamic
18       tracing, and will need updating to match any changes to this function.
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20       Since this uses BPF, only the root user can use this tool.
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REQUIREMENTS

23       CONFIG_BPF and bcc.
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EXAMPLES

26       Count new processes created each second:
27              # pidpersec
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OVERHEAD

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

36       This is from bcc.
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38              https://github.com/iovisor/bcc
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40       Also look in the bcc distribution for a  companion  _examples.txt  file
41       containing example usage, output, and commentary for this tool.
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OS

44       Linux
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STABILITY

47       Unstable - in development.
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AUTHOR

50       Brendan Gregg
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