Commit 3df33a0f authored Feb 05, 2018 by Stefan Raspl Committed by Paolo Bonzini Feb 24, 2018

tools/kvm_stat: fix crash when filtering out all non-child trace events



When we apply a filter that will only leave child trace events, we
receive a ZeroDivisionError when calculating the percentages.
In that case, provide percentages based on child events only.
To reproduce, run 'kvm_stat -f .*[\(].*'.

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

parent 369d5a85

tools/kvm/kvm_stat/kvm_stat

+6 −0

Original line number	Diff line number	Diff line
		@@ -1084,9 +1084,15 @@ class Tui(object):
		self.screen.clrtobot()
		stats = self.stats.get(self._display_guests)
		total = 0.
		ctotal = 0.
		for key, values in stats.items():
		if key.find('(') == -1:
		total += values.value
		else:
		ctotal += values.value
		if total == 0.:
		# we don't have any fields, or all non-child events are filtered
		total = ctotal

		if self._sorting == SORT_DEFAULT:
		def sortkey((_k, v)):