Adding percent I/O time similar to iostat.

Martin Suehowicz · Martin Suehowicz · commit 4a7c82da760b · 2011-10-08T00:15:59.000-07:00
diff --git a/diskstat/python_modules/diskstat.py b/diskstat/python_modules/diskstat.py
@@ -155,6 +155,7 @@ def update_stats():
 		get_diff(dev, 'write_time', int(vals[10]))
 
 		get_diff(dev, 'io_time', int(vals[12]))
+		get_percent_time(dev, 'percent_io_time', int(stats[dev]['io_time']))
 		get_diff(dev, 'weighted_io_time', int(vals[13]))
 
 
@@ -186,6 +187,17 @@ def get_delta(dev, key, val, convert=1):
 
 	last_val[dev][key] = int(val)
 
+def get_percent_time(dev, key, val):
+	logging.debug(' get_percent_time for ' + dev +  '_' + key)
+	global stats, last_val
+
+	interval = (cur_time - last_update) * 1000
+
+	if interval > 0:
+		stats[dev][key] = round(((val / interval) * 100),2)
+	else:
+		stats[dev][key] = 0
+
 def get_diff(dev, key, val):
 	logging.debug(' get_diff for ' + dev + '_' + key)
 	global stats, last_val
@@ -275,6 +287,12 @@ def metric_init(params):
 			'units': 'ms',
 			'description': 'The time in milliseconds spent in I/O operations'},
 
+		percent_io_time = {
+			'units': 'percent',
+			'value_type': 'float',
+			'format': '%f',
+			'description': 'The percent of disk time spent on I/O operations'},
+
 		weighted_io_time = {
 			'units': 'ms',
 			'description': 'The weighted time in milliseconds spend in I/O operations. This measures each I/O start, I/O completion, I/O merge, or read of these stats by the number of I/O operations in progress times the number of milliseconds spent doing I/O.'}
