profile.py: parse the output of "dracut --profile" for profiling

diff --git a/profile.py b/profile.py
new file mode 100644 (file)
index 0000000..e1d0cab
--- /dev/null
+++ b/profile.py
@@ -0,0 +1,58 @@
+#
+# parse the output of "dracut --profile" and produce profiling information
+#
+# Copyright 2011 Harald Hoyer <harald@redhat.com>
+# Copyright 2011 Red Hat, Inc.  All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+import sys
+import operator
+import re
+loglines = sys.stdin
+
+logpats  = r'[+]+[ \t]+([^ \t]+)[ \t]+([^ \t:]+):[ ]+.*'
+
+logpat   = re.compile(logpats)
+
+groups   = (logpat.match(line) for line in loglines)
+tuples   = (g.groups() for g in groups if g)
+
+def gen_times(t):
+    oldx=None
+    for x in t:
+        fx=float(x[0])
+        if oldx:
+            #print fx - float(oldx[0]), x[0], x[1], oldx[0], oldx[1]
+            yield (fx - float(oldx[0]), oldx[1])
+
+        oldx = x
+
+colnames = ('time','line')
+
+log      = (dict(zip(colnames,t)) for t in gen_times(tuples))
+
+if __name__ == '__main__':
+    e={}
+    for x in log:
+        if not x['line'] in e:
+            e[x['line']] = x['time']
+        else:
+            e[x['line']] += x['time']
+
+    sorted_x = sorted(e.iteritems(), key=operator.itemgetter(1), reverse=True)
+    for x in sorted_x:
+        print x[0], x[1]
+