kvm: add top-like utility for displaying kvm statistics

1 files changed, 56 insertions, 0 deletions

diff --git a/kvm/kvm_stat b/kvm/kvm_stat
new file mode 100755
index 000000000..af13dea2a
--- /dev/null
+++ b/kvm/kvm_stat
@@ -0,0 +1,56 @@
+#!/usr/bin/python
+
+import curses
+import os, time
+
+#for i in  /sys/kernel/debug/kvm/*; do echo $(basename $i) $(cat $i); done
+
+class Stats:
+    def __init__(self):
+        self.base = '/sys/kernel/debug/kvm'
+        self.values = {}
+        for key in os.listdir(self.base):
+            self.values[key] = None
+    def get(self):
+        for key, oldval in self.values.iteritems():
+            newval = int(file(self.base + '/' + key).read())
+            newdelta = None
+            if oldval is not None:
+                newdelta = newval - oldval[0]
+            self.values[key] = (newval, newdelta)
+        return self.values
+
+stats = Stats()
+        
+def main(screen, stats):
+    curses.noecho()
+    def refresh():
+        screen.erase()
+        screen.addstr(0, 0, 'kvm statistics')
+        row = 2
+        s = stats.get()
+        for key in sorted(s.keys()):
+            values = s[key]
+            screen.addstr(row, 1, key)
+            screen.addstr(row, 12, '%10d' % (values[0],))
+            if values[1]:
+                screen.addstr(row, 22, '%8d' % (values[1],))
+            row += 1
+        screen.refresh()
+
+    while True:
+        refresh()
+        curses.halfdelay(10)
+        try:
+            c = screen.getkey()
+            if c == 'q':
+                break
+        except KeyboardInterrupt:
+            break
+        except curses.error:
+            continue
+        
+
+import curses.wrapper
+curses.wrapper(main, stats)
+