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