From: Avi Kivity <[email protected]>
Signed-off-by: Avi Kivity <[email protected]>
diff --git a/kvm/kvm_stat b/kvm/kvm_stat
index 21aff5b..75424fc 100755
--- a/kvm/kvm_stat
+++ b/kvm/kvm_stat
@@ -3,21 +3,36 @@
import curses
import sys, os, time, optparse
+class DebugfsProvider(object):
+ def __init__(self):
+ self.base = '/sys/kernel/debug/kvm'
+ self._fields = os.listdir(self.base)
+ def fields(self):
+ return self._fields
+ def select(self, fields):
+ self._fields = fields
+ def read(self):
+ def val(key):
+ return int(file(self.base + '/' + key).read())
+ return dict([(key, val(key)) for key in self._fields])
+
class Stats:
- def __init__(self, fields = None):
+ def __init__(self, provider, fields = None):
def wanted(key):
import re
if not fields:
return True
return re.match(fields, key) != None
- self.base = '/sys/kernel/debug/kvm'
- self.values = {}
- for key in os.listdir(self.base):
- if wanted(key):
- self.values[key] = None
+ self.provider = provider
+ self.values = dict([(key, None)
+ for key in provider.fields()
+ if wanted(key)])
+ self.provider.select(self.values.keys())
def get(self):
- for key, oldval in self.values.iteritems():
- newval = int(file(self.base + '/' + key).read())
+ new = self.provider.read()
+ for key in self.provider.fields():
+ oldval = self.values[key]
+ newval = new[key]
newdelta = None
if oldval is not None:
newdelta = newval - oldval[0]
@@ -118,7 +133,7 @@ options.add_option('-f', '--fields',
)
(options, args) = options.parse_args(sys.argv)
-stats = Stats(fields = options.fields)
+stats = Stats(provider = DebugfsProvider(), fields = options.fields)
if options.log:
log(stats)
--
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