linux-toradex.git/tools/kvm, branch v5.12-rc5

tools/kvm_stat: Exempt time-based counters

2020-12-12T00:18:51+00:00

The new counters halt_poll_success_ns and halt_poll_fail_ns do not count
events. Instead they provide a time, and mess up our statistics. Therefore,
we should exclude them.
Removal is currently implemented with an exempt list. If more counters like
these appear, we can think about a more general rule like excluding all
fields name "*_ns", in case that's a standing convention.

Signed-off-by: Stefan Raspl 
Tested-and-reported-by: Christian Borntraeger 
Message-Id: <20201208210829.101324-1-raspl@linux.ibm.com>
Signed-off-by: Paolo Bonzini

tools/kvm_stat: add sample systemd unit file

2020-04-21T13:13:12+00:00

Add a sample unit file as a basis for systemd integration of kvm_stat
logs.

Signed-off-by: Stefan Raspl 
Message-Id: <20200402085705.61155-4-raspl@linux.ibm.com>
Signed-off-by: Paolo Bonzini

tools/kvm_stat: Add command line switch '-L' to log to file

2020-04-21T13:13:12+00:00

To integrate with logrotate, we have a signal handler that will re-open
the logfile.
Assuming we have a systemd unit file with
     ExecStart=kvm_stat -dtc -s 10 -L /var/log/kvm_stat.csv
     ExecReload=/bin/kill -HUP $MAINPID
and a logrotate config featuring
     postrotate
        /bin/systemctl reload kvm_stat.service
     endscript
Then the overall flow will look like this:
(1) systemd starts kvm_stat, logging to A.
(2) At some point, logrotate runs, moving A to B.
    kvm_stat continues to write to B at this point.
(3) After rotating, logrotate restarts the kvm_stat unit via systemctl.
(4) The kvm_stat unit sends a SIGHUP to kvm_stat, finally making it
    switch over to writing to A again.
Note that in order to keep the structure of the cvs output in tact, we
make sure to, in contrast to the standard log format, only write the
header once at the beginning of a file. This implies that the header is
suppressed when appending to an existing file. Unlike with the standard
format, where we append to an existing file by starting out with a
header.

Signed-off-by: Stefan Raspl 
Message-Id: <20200402085705.61155-3-raspl@linux.ibm.com>
Signed-off-by: Paolo Bonzini

tools/kvm_stat: add command line switch '-z' to skip zero records

2020-04-21T13:13:11+00:00

When running in logging mode, skip records with all zeros (=empty records)
to preserve space when logging to files.

Signed-off-by: Stefan Raspl 
Message-Id: <20200402085705.61155-2-raspl@linux.ibm.com>
Signed-off-by: Paolo Bonzini

tools/kvm_stat: add command line switch '-c' to log in csv format

2020-03-23T19:44:21+00:00

Add an alternative format that can be more easily used for further
processing later on.
Note that we add a timestamp in the first column for both, the regular
and the new csv format.

Signed-off-by: Stefan Raspl 
Message-Id: <20200306114250.57585-5-raspl@linux.ibm.com>
Signed-off-by: Paolo Bonzini

tools/kvm_stat: add command line switch '-s' to set update interval

2020-03-23T19:44:20+00:00

This now controls both, the refresh rate of the interactive mode as well
as the logging mode. Which, as a consequence, means that the default of
logging mode is now 3s, too (use command line switch '-s' to adjust to
your liking).

Signed-off-by: Stefan Raspl 
Message-Id: <20200306114250.57585-4-raspl@linux.ibm.com>
Signed-off-by: Paolo Bonzini

tools/kvm_stat: switch to argparse

2020-03-23T19:44:20+00:00

optparse is deprecated for a while, hence switching over to argparse
(which also works with python2).
As a consequence, help output has some subtle changes, the most
significant one being that the options are all listed explicitly
instead of a universal '[options]' indicator. Also, some of the error
messages are phrased slightly different.
While at it, squashed a number of minor PEP8 issues.

Signed-off-by: Stefan Raspl 
Message-Id: <20200306114250.57585-3-raspl@linux.ibm.com>
Signed-off-by: Paolo Bonzini

tools/kvm_stat: rework command line sequence and message texts

2020-03-23T19:44:19+00:00

Make sure command line arguments are sorted alphabetically
everywhere, and adjusted existing texts for interactive command 's' to
become consistent with the long form --set-delay.
Throwing in some PEP8 fixes (all cosmetics) for good measure.

Signed-off-by: Stefan Raspl 
Message-Id: <20200306114250.57585-2-raspl@linux.ibm.com>
Signed-off-by: Paolo Bonzini

tools/kvm_stat: Fix kvm_exit filter name

2020-01-23T08:51:06+00:00

The filter name is fixed to "exit_reason" for some kvm_exit events, no
matter what architect we have. Actually, the filter name ("exit_reason")
is only applicable to x86, meaning it's broken on other architects
including aarch64.

This fixes the issue by providing various kvm_exit filter names, depending
on architect we're on. Afterwards, the variable filter name is picked and
applied through ioctl(fd, SET_FILTER).

Reported-by: Andrew Jones 
Signed-off-by: Gavin Shan 
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 499

2019-06-19T15:09:53+00:00

Based on 1 normalized pattern(s):

  this work is licensed under the terms of the gnu gpl version 2 see
  the copying file in the top level directory

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 35 file(s).

Signed-off-by: Thomas Gleixner 
Reviewed-by: Kate Stewart 
Reviewed-by: Enrico Weigelt 
Reviewed-by: Allison Randal 
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190604081206.797835076@linutronix.de
Signed-off-by: Greg Kroah-Hartman