]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
tools/kvm_stat: fix fields filter for child events
authorStefan Raspl <stefan.raspl@de.ibm.com>
Sun, 21 Apr 2019 13:26:24 +0000 (15:26 +0200)
committerPaolo Bonzini <pbonzini@redhat.com>
Fri, 24 May 2019 19:27:17 +0000 (21:27 +0200)
commit883d25e70b2f699fed9017e509d1ef8e36229b89
tree85b0ef25b39e9ea8214f6635b9e05cbf3bcf7842
parentc795720629ae1bfcbaef7a934a4cc1ce8c2e2834
tools/kvm_stat: fix fields filter for child events

The fields filter would not work with child fields, as the respective
parents would not be included. No parents displayed == no childs displayed.
To reproduce, run on s390 (would work on other platforms, too, but would
require a different filter name):
- Run 'kvm_stat -d'
- Press 'f'
- Enter 'instruct'
Notice that events like instruction_diag_44 or instruction_diag_500 are not
displayed - the output remains empty.
With this patch, we will filter by matching events and their parents.
However, consider the following example where we filter by
instruction_diag_44:

  kvm statistics - summary
                   regex filter: instruction_diag_44
   Event                                         Total %Total CurAvg/s
   exit_instruction                                276  100.0       12
     instruction_diag_44                           256   92.8       11
   Total                                           276              12

Note that the parent ('exit_instruction') displays the total events, but
the childs listed do not match its total (256 instead of 276). This is
intended (since we're filtering all but one child), but might be confusing
on first sight.

Signed-off-by: Stefan Raspl <raspl@linux.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
tools/kvm/kvm_stat/kvm_stat
tools/kvm/kvm_stat/kvm_stat.txt