1KVM_STAT(1)                                                        KVM_STAT(1)
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NAME

6       kvm_stat - Report KVM kernel module event counters
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SYNOPSIS

9       kvm_stat [OPTION]...
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DESCRIPTION

12       kvm_stat prints counts of KVM kernel module trace events. These events
13       signify state transitions such as guest mode entry and exit.
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15       This tool is useful for observing guest behavior from the host
16       perspective. Often conclusions about performance or buggy behavior can
17       be drawn from the output. While running in regular mode, use any of the
18       keys listed in section Interactive Commands below. Use batch and
19       logging modes for scripting purposes.
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21       The set of KVM kernel module trace events may be specific to the kernel
22       version or architecture. It is best to check the KVM kernel module
23       source code for the meaning of events.
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INTERACTIVE COMMANDS

26       b   toggle events by guests
27           (debugfs only, honors
28           filters)
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30       c   clear filter
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32       f   filter by regular
33           expression
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35       g   filter by guest name/PID
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37       h   display interactive
38           commands reference
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40       o   toggle sorting order
41           (Total vs CurAvg/s)
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43       p   filter by guest name/PID
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45       q   quit
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47       r   reset stats
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49       s   set update interval
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51       x   toggle reporting of stats
52           for child trace events
53
54           Note: The stats for the
55           parents summarize the
56           respective child trace
57           events
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59
60       Press any other key to refresh statistics immediately.
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OPTIONS

63       -1, --once, --batch
64           run in batch mode for one second
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66       -l, --log
67           run in logging mode (like vmstat)
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69       -t, --tracepoints
70           retrieve statistics from tracepoints
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72       -d, --debugfs
73           retrieve statistics from debugfs
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75       -i, --debugfs-include-past
76           include all available data on past events for debugfs
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78       -p<pid>, --pid=<pid>
79           limit statistics to one virtual machine (pid)
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81       -g<guest>, --guest=<guest_name>
82           limit statistics to one virtual machine (guest name)
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84       -f<fields>, --fields=<fields>
85           fields to display (regex), "-f help" for a list of available events
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87       -h, --help
88           show help message
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SEE ALSO

91       perf(1), trace-cmd(1)
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AUTHOR

94       Stefan Hajnoczi <stefanha@redhat.com>
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98                                  06/03/2019                       KVM_STAT(1)