[PATCH 0/7] tools/kvm_stat: add logfile support

[Stefan Raspl <raspl@linux.ibm.com>]

This patch series provides a couple of new options to make logging to
files feasible.
Specifically, we add command line switches to specify an arbitrary time
interval for logging, and to toggle between a .csv and the previous
file format. Furthermore, we allow logging to files, where we utilize a
rotating set of 6 logfiles, each with its own header for easy post-
processing, especially when using .csv format.
Since specifying logfile size limits might be a non-trivial exercise,
we're throwing in yet another command line option that allows to
specify the minimum timeframe that should be covered by logs.
Finally, there's a minimal systemd unit file to deploy kvm_stat-based
logging in Linux distributions.
Note that the decision to write our own logfiles rather than to log to
e.g. systemd journal is a conscious one: It is effectively impossible to
write csv records into the systemd journal, the header will either
disappear after a while or has to be repeated from time to time, which
defeats the purpose of having a .csv format that can be easily post-
processed, etc.
See individual patch description for further details.


Stefan Raspl (7):
  tools/kvm_stat: rework command line sequence and message texts
  tools/kvm_stat: switch to argparse
  tools/kvm_stat: add command line switch '-s' to set update interval
  tools/kvm_stat: add command line switch '-c' to log in csv format
  tools/kvm_stat: add rotating log support
  tools/kvm_stat: add command line switch '-T'
  tools/kvm_stat: add sample systemd unit file

 tools/kvm/kvm_stat/kvm_stat         | 434 +++++++++++++++++++++-------
 tools/kvm/kvm_stat/kvm_stat.service |  15 +
 tools/kvm/kvm_stat/kvm_stat.txt     |  59 ++--
 3 files changed, 384 insertions(+), 124 deletions(-)
 create mode 100644 tools/kvm/kvm_stat/kvm_stat.service

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2.17.1