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Having stats for single VMs can help to determine the problem of a VM without the need of running other tools like perf. The tracepoints already allowed pid level monitoring, but kvm_stat didn't have support for it till now. Support for the newly implemented debugfs vm monitoring was also implemented. Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
64 lines
1.1 KiB
Plaintext
64 lines
1.1 KiB
Plaintext
kvm_stat(1)
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===========
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NAME
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----
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kvm_stat - Report KVM kernel module event counters
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SYNOPSIS
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--------
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[verse]
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'kvm_stat' [OPTION]...
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DESCRIPTION
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-----------
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kvm_stat prints counts of KVM kernel module trace events. These events signify
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state transitions such as guest mode entry and exit.
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This tool is useful for observing guest behavior from the host perspective.
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Often conclusions about performance or buggy behavior can be drawn from the
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output.
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The set of KVM kernel module trace events may be specific to the kernel version
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or architecture. It is best to check the KVM kernel module source code for the
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meaning of events.
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OPTIONS
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-------
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-1::
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--once::
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--batch::
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run in batch mode for one second
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-l::
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--log::
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run in logging mode (like vmstat)
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-t::
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--tracepoints::
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retrieve statistics from tracepoints
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-d::
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--debugfs::
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retrieve statistics from debugfs
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-p<pid>::
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--pid=<pid>::
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limit statistics to one virtual machine (pid)
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-f<fields>::
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--fields=<fields>::
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fields to display (regex)
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-h::
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--help::
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show help message
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SEE ALSO
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--------
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'perf'(1), 'trace-cmd'(1)
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AUTHOR
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------
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Stefan Hajnoczi <stefanha@redhat.com>
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