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authorMarc Hartmayer <mhartmay@linux.vnet.ibm.com>2018-01-09 13:27:02 +0100
committerPaolo Bonzini <pbonzini@redhat.com>2018-02-24 01:43:39 +0100
commit006f1548ac13d67d21865416a0f4e8062df1a85f (patch)
tree1cd9141b5d751773064f6457556cf0997340792f /tools/kvm
parentfaa312a543283c717342cd332b5b9247bd305dce (diff)
tools/kvm_stat: use a namedtuple for storing the values
Use a namedtuple for storing the values as it allows to access the fields of a tuple via names. This makes the overall code much easier to read and to understand. Access by index is still possible as before. Signed-off-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com> Tested-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools/kvm')
-rwxr-xr-xtools/kvm/kvm_stat/kvm_stat27
1 files changed, 15 insertions, 12 deletions
diff --git a/tools/kvm/kvm_stat/kvm_stat b/tools/kvm/kvm_stat/kvm_stat
index d630f5f3e091..2b7e83a5f7b8 100755
--- a/tools/kvm/kvm_stat/kvm_stat
+++ b/tools/kvm/kvm_stat/kvm_stat
@@ -33,7 +33,7 @@ import resource
import struct
import re
import subprocess
-from collections import defaultdict
+from collections import defaultdict, namedtuple
VMX_EXIT_REASONS = {
'EXCEPTION_NMI': 0,
@@ -800,6 +800,9 @@ class DebugfsProvider(Provider):
self.read(2)
+EventStat = namedtuple('EventStat', ['value', 'delta'])
+
+
class Stats(object):
"""Manages the data providers and the data they provide.
@@ -867,10 +870,10 @@ class Stats(object):
for provider in self.providers:
new = provider.read(by_guest=by_guest)
for key in new if by_guest else provider.fields:
- oldval = self.values.get(key, (0, 0))[0]
+ oldval = self.values.get(key, EventStat(0, 0)).value
newval = new.get(key, 0)
newdelta = newval - oldval
- self.values[key] = (newval, newdelta)
+ self.values[key] = EventStat(newval, newdelta)
return self.values
def toggle_display_guests(self, to_pid):
@@ -1083,28 +1086,28 @@ class Tui(object):
total = 0.
for key in stats.keys():
if key.find('(') is -1:
- total += stats[key][0]
+ total += stats[key].value
if self._sorting == SORT_DEFAULT:
def sortkey((_k, v)):
# sort by (delta value, overall value)
- return (v[1], v[0])
+ return (v.delta, v.value)
else:
def sortkey((_k, v)):
# sort by overall value
- return v[0]
+ return v.value
tavg = 0
for key, values in sorted(stats.items(), key=sortkey, reverse=True):
if row >= self.screen.getmaxyx()[0] - 1:
break
- if not values[0] and not values[1]:
+ if not values.value and not values.delta:
break
- if values[0] is not None:
- cur = int(round(values[1] / sleeptime)) if values[1] else ''
+ if values.value is not None:
+ cur = int(round(values.delta / sleeptime)) if values.delta else ''
if self._display_guests:
key = self.get_gname_from_pid(key)
self.screen.addstr(row, 1, '%-40s %10d%7.1f %8s' %
- (key, values[0], values[0] * 100 / total,
+ (key, values.value, values.value * 100 / total,
cur))
if cur is not '' and key.find('(') is -1:
tavg += cur
@@ -1375,7 +1378,7 @@ def batch(stats):
s = stats.get()
for key in sorted(s.keys()):
values = s[key]
- print('%-42s%10d%10d' % (key, values[0], values[1]))
+ print('%-42s%10d%10d' % (key, values.value, values.delta))
except KeyboardInterrupt:
pass
@@ -1392,7 +1395,7 @@ def log(stats):
def statline():
s = stats.get()
for k in keys:
- print(' %9d' % s[k][1], end=' ')
+ print(' %9d' % s[k].delta, end=' ')
print()
line = 0
banner_repeat = 20