Commit Graph

22 Commits

Author SHA1 Message Date
Stefan Raspl e55fe3cccc tools/kvm_stat: add '%Total' column
Add column '%Total' next to 'Total' for easier comparison of numbers between
hosts.

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Marc Hartmayer <mhartmay@linux.vnet.ibm.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29 12:01:33 +02:00
Stefan Raspl 9f114a03c6 tools/kvm_stat: add interactive command 'r'
Provide an interactive command to reset the tracepoint statistics.
Requires some extra work for debugfs, as the counters cannot be reset.

On the up side, this offers us the opportunity to have debugfs values
reset on startup and whenever a filter is modified, becoming consistent
with the tracepoint provider. As a bonus, 'kvmstat -dt' will now provide
useful output, instead of mixing values in totally different orders of
magnitude.
Furthermore, we avoid unnecessary resets when any of the filters is
"changed" interactively to the previous value.

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Acked-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29 12:01:32 +02:00
Stefan Raspl 4443084fa0 tools/kvm_stat: add interactive command 'c'
Provide a real simple way to erase any active filter.

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Reviewed-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29 12:01:32 +02:00
Stefan Raspl f9ff108735 tools/kvm_stat: add option '--guest'
Add a new option '-g'/'--guest' to select a particular process by providing
the QEMU guest name.
Notes:
- The logic to figure out the pid corresponding to the guest name might look
  scary, but works pretty reliably in practice; in the unlikely event that it
  returns add'l flukes, it will bail out and hint at using '-p' instead, no
  harm done.
- Mixing '-g' and '-p' is possible, and the final instance specified on the
  command line is the significant one. This is consistent with current
  behavior for '-p' which, if specified multiple times, also regards the final
  instance as the significant one.

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29 12:01:31 +02:00
Stefan Raspl 645c1728a9 tools/kvm_stat: remove regex filter on empty input
Behavior on empty/0 input for regex and pid filtering was inconsistent, as
the former would keep the current filter, while the latter would (naturally)
remove any pid filtering.
Make things consistent by falling back to the default filter on empty input
for the regex filter dialogue.

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Reviewed-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29 12:01:30 +02:00
Stefan Raspl 72187dfa8e tools/kvm_stat: display regex when set to non-default
If a user defines a regex filter through the interactive command, display
the active regex in the header's second line.

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Reviewed-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29 12:01:30 +02:00
Stefan Raspl 0152c20f04 tools/kvm_stat: print error messages on faulty pid filter input
Print helpful messages in case users enter invalid input or invalid pids in
the interactive pid filter dialogue.

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Reviewed-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29 12:01:29 +02:00
Stefan Raspl be03ea3b77 tools/kvm_stat: remove pid filter on empty input
Improve consistency in the interactive dialogue for pid filtering by
removing any filters on empty input (in addition to entering 0).

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Reviewed-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29 12:01:29 +02:00
Stefan Raspl a24e85f6a6 tools/kvm_stat: display guest name when using pid filter
When running kvm_stat with option '-p' to filter per process, display
the QEMU guest name next to the pid, if available.

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Reviewed-By: Janosch Frank <frankja@linux.vnet.ibm.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29 12:01:28 +02:00
Stefan Raspl 1eaa2f9022 tools/kvm_stat: document list of interactive commands
Apart from the source code, there does not seem to be a place that documents
the interactive capabilities of kvm_stat yet.

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29 12:01:28 +02:00
Stefan Raspl 184b2d23b0 tools/kvm_stat: reduce perceived idle time on filter updates
Whenever a user adds a filter, we
* redraw the header immediately for a snappy response
* print a message indicating to the user that we're busy while the
  noticeable delay induced by updating all of the stats objects takes place
* update the statistics ASAP (i.e. after 0.25s instead of 3s) to be
  consistent with behavior on startup
To do so, we split the Tui's refresh() method to allow for drawing header
and stats separately, and trigger a header refresh whenever we are about
to do something that takes a while - like updating filters.

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29 12:01:27 +02:00
Stefan Raspl 692c7f6deb tools/kvm_stat: full PEP8 compliance
Provides all missing empty lines as required for full PEP compliance.

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Reviewed-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29 12:01:26 +02:00
Stefan Raspl a183606937 tools/kvm_stat: fix trace setup glitch on field updates in TracepointProvider
Updating the fields of the TracepointProvider does not propagate changes to the
tracepoints. This shows when a pid filter is enabled, whereby subsequent
extensions of the fields of the Tracepoint provider (e.g. by toggling
drilldown) will not modify the tracepoints as required.
To reproduce, select a specific process via interactive command 'p', and
enable drilldown via 'x' - none of the fields with the braces will appear
although they should.
The fix will always leave all available fields in the TracepointProvider
enabled.

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Based-on-text-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29 12:01:26 +02:00
Stefan Raspl e0ba38765c tools/kvm_stat: fix misc glitches
Addresses
- eliminate extra import
- missing variable initialization
- type redefinition from int to float
- passing of int type argument instead of string
- a couple of PEP8-reported indentation/formatting glitches
- remove unused variable drilldown in class Tui

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Reviewed-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29 12:01:25 +02:00
Stefan Raspl dadf1e7839 tools/kvm_stat: handle SIGINT in log and batch modes
SIGINT causes ugly unhandled exceptions in log and batch mode, which we
prevent by catching the exceptions accordingly.

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Reviewed-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29 12:01:25 +02:00
Stefan Raspl 9fc0adfc42 tools/kvm_stat: catch curses exceptions only
The previous version was catching all exceptions, including SIGINT.
We only want to catch the curses exceptions here.

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Reviewed-by: Sascha Silbe <silbe@linux.vnet.ibm.com>
Reviewed-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29 12:01:24 +02:00
Stefan Raspl a0b4e6a032 tools/kvm_stat: hide cursor
When running kvm_stat in interactive mode, the cursor appears at the lower
left corner, which looks a bit distracting.
This patch hides the cursor by turning it invisible.

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Reviewed-By: Sascha Silbe <silbe@linux.vnet.ibm.com>
Reviewed-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29 12:01:24 +02:00
Janosch Frank fabc712866 tools: kvm_stat: Add comments
A lot of the code works with the perf events about which only sparse
documentation was available until 2012. Having that information now,
we can clarify what is done in the code.

Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-05-25 16:12:06 +02:00
Janosch Frank f0cf040f84 tools: kvm_stat: Introduce pid monitoring
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>
2016-05-25 16:12:06 +02:00
Hemant Kumar c7d4fb5a6e tools: kvm_stat: Powerpc related fixes
kvm_stat script is failing to execute on powerpc :
 # ./kvm_stat
Traceback (most recent call last):
  File "./kvm_stat", line 825, in <module>
    main()
  File "./kvm_stat", line 813, in main
    providers = get_providers(options)
  File "./kvm_stat", line 778, in get_providers
    providers.append(TracepointProvider())
  File "./kvm_stat", line 416, in __init__
    self.filters = get_filters()
  File "./kvm_stat", line 315, in get_filters
    if ARCH.exit_reasons:
AttributeError: 'ArchPPC' object has no attribute 'exit_reasons'

This is because, its trying to access a non-defined attribute.

Also, the IOCTL number of RESET is incorrect for powerpc. The correct
number has been added.

Signed-off-by: Hemant Kumar <hemant@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-05-25 16:12:04 +02:00
Paolo Bonzini fd41b5a969 tools: Add kvm_stat man page
Converted from the Texinfo source in QEMU to asciidoc.  The a2x
incantation was provided by Janosch Frank.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-05-25 16:12:03 +02:00
Janosch Frank f9bc9e65fb tools: Add kvm_stat vm monitor script
This tool displays kvm vm exit statistics to ease vm monitoring. It
takes its data from the kvm debugfs files or the vm tracepoints and
outputs them as a curses ui or simple text.

It was moved from qemu, as it is dependent on the kernel whereas qemu
works with a large number of kernel versions, some of which may break
the script.

Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-05-25 16:12:03 +02:00