table of contents
KVM_STAT(1) | KVM_STAT(1) |
NAME¶
kvm_stat - Report KVM kernel module event counters
SYNOPSIS¶
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¶
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 delay between refreshs |
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
-c, --csv
-d, --debugfs
-f<fields>, --fields=<fields>
-g<guest>, --guest=<guest_name>
-h, --help
-i, --debugfs-include-past
-l, --log
-L<file>, --log-to-file=<file>
-p<pid>, --pid=<pid>
-s, --set-delay
-t, --tracepoints
-z, --skip-zero-records
SIGNALS¶
when kvm_stat is running in logging mode (either with -l or with -L), it handles the following signals:
SIGHUP - closes and reopens the log file (-L only), then continues.
SIGINT - closes the log file and terminates. SIGTERM - closes the log file and terminates.
SEE ALSO¶
AUTHOR¶
Stefan Hajnoczi <stefanha@redhat.com>
10/29/2024 |