From 3df33a0f34a3883b6696bff8cc8fcda3c7444a62 Mon Sep 17 00:00:00 2001 From: Stefan Raspl Date: Mon, 5 Feb 2018 13:59:57 +0100 Subject: 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 Signed-off-by: Paolo Bonzini --- tools/kvm/kvm_stat/kvm_stat | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tools/kvm/kvm_stat/kvm_stat b/tools/kvm/kvm_stat/kvm_stat index e3f0becb6632..4e0f282c5289 100755 --- a/tools/kvm/kvm_stat/kvm_stat +++ b/tools/kvm/kvm_stat/kvm_stat @@ -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)): -- cgit v1.2.3