tools/kvm/kvm_stat/kvm_stat.txt

   1 kvm_stat(1)
   2 ===========
   3
   4 NAME
   5 ----
   6 kvm_stat - Report KVM kernel module event counters
   7
   8 SYNOPSIS
   9 --------
  10 [verse]
  11 'kvm_stat' [OPTION]...
  12
  13 DESCRIPTION
  14 -----------
  15 kvm_stat prints counts of KVM kernel module trace events.  These events signify
  16 state transitions such as guest mode entry and exit.
  17
  18 This tool is useful for observing guest behavior from the host perspective.
  19 Often conclusions about performance or buggy behavior can be drawn from the
  20 output.
  21 While running in regular mode, use any of the keys listed in section
  22 'Interactive Commands' below.
  23 Use batch and logging modes for scripting purposes.
  24
  25 The set of KVM kernel module trace events may be specific to the kernel version
  26 or architecture.  It is best to check the KVM kernel module source code for the
  27 meaning of events.
  28
  29 INTERACTIVE COMMANDS
  30 --------------------
  31 [horizontal]
  32 *c*::   clear filter
  33
  34 *f*::   filter by regular expression
  35
  36 *g*::   filter by guest name
  37
  38 *h*::   display interactive commands reference
  39
  40 *o*::   toggle sorting order (Total vs CurAvg/s)
  41
  42 *p*::   filter by PID
  43
  44 *q*::   quit
  45
  46 *r*::   reset stats
  47
  48 *s*::   set update interval
  49
  50 *x*::   toggle reporting of stats for child trace events
  51
  52 Press any other key to refresh statistics immediately.
  53
  54 OPTIONS
  55 -------
  56 -1::
  57 --once::
  58 --batch::
  59         run in batch mode for one second
  60
  61 -l::
  62 --log::
  63         run in logging mode (like vmstat)
  64
  65 -t::
  66 --tracepoints::
  67         retrieve statistics from tracepoints
  68
  69 -d::
  70 --debugfs::
  71         retrieve statistics from debugfs
  72
  73 -i::
  74 --debugfs-include-past::
  75         include all available data on past events for debugfs
  76
  77 -p<pid>::
  78 --pid=<pid>::
  79         limit statistics to one virtual machine (pid)
  80
  81 -g<guest>::
  82 --guest=<guest_name>::
  83         limit statistics to one virtual machine (guest name)
  84
  85 -f<fields>::
  86 --fields=<fields>::
  87         fields to display (regex)
  88
  89 -h::
  90 --help::
  91         show help message
  92
  93 SEE ALSO
  94 --------
  95 'perf'(1), 'trace-cmd'(1)
  96
  97 AUTHOR
  98 ------
  99 Stefan Hajnoczi <stefanha@redhat.com>