Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 105 insertions, 0 deletions

diff --git a/tools/kvm/kvm_stat/kvm_stat.txt b/tools/kvm/kvm_stat/kvm_stat.txt
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+kvm_stat(1)
+===========
+
+NAME
+----
+kvm_stat - Report KVM kernel module event counters
+
+SYNOPSIS
+--------
+[verse]
+'kvm_stat' [OPTION]...
+
+DESCRIPTION
+-----------
+kvm_stat prints counts of KVM kernel module trace events.  These events signify
+state transitions such as guest mode entry and exit.
+
+This tool is useful for observing guest behavior from the host perspective.
+Often conclusions about performance or buggy behavior can be drawn from the
+output.
+While running in regular mode, use any of the keys listed in section
+'Interactive Commands' below.
+Use batch and logging modes for scripting purposes.
+
+The set of KVM kernel module trace events may be specific to the kernel version
+or architecture.  It is best to check the KVM kernel module source code for the
+meaning of events.
+
+INTERACTIVE COMMANDS
+--------------------
+[horizontal]
+*b*::	toggle events by guests (debugfs only, honors filters)
+
+*c*::	clear filter
+
+*f*::	filter by regular expression
+ ::     *Note*: Child events pull in their parents, and parents' stats summarize
+                all child events, not just the filtered ones
+
+*g*::	filter by guest name/PID
+
+*h*::	display interactive commands reference
+
+*o*::   toggle sorting order (Total vs CurAvg/s)
+
+*p*::	filter by guest name/PID
+
+*q*::	quit
+
+*r*::	reset stats
+
+*s*::   set update interval
+
+*x*::	toggle reporting of stats for child trace events
+ ::     *Note*: The stats for the parents summarize the respective child trace
+                events
+
+Press any other key to refresh statistics immediately.
+
+OPTIONS
+-------
+-1::
+--once::
+--batch::
+	run in batch mode for one second
+
+-l::
+--log::
+	run in logging mode (like vmstat)
+
+-t::
+--tracepoints::
+	retrieve statistics from tracepoints
+
+-d::
+--debugfs::
+	retrieve statistics from debugfs
+
+-i::
+--debugfs-include-past::
+	include all available data on past events for debugfs
+
+-p<pid>::
+--pid=<pid>::
+	limit statistics to one virtual machine (pid)
+
+-g<guest>::
+--guest=<guest_name>::
+	limit statistics to one virtual machine (guest name)
+
+-f<fields>::
+--fields=<fields>::
+	fields to display (regex), "-f help" for a list of available events
+
+-h::
+--help::
+	show help message
+
+SEE ALSO
+--------
+'perf'(1), 'trace-cmd'(1)
+
+AUTHOR
+------
+Stefan Hajnoczi <stefanha@redhat.com>