From a85a968aae98fdf081b0fbd75bb15db8bd8ef9b4 Mon Sep 17 00:00:00 2001
From: Arvid Norberg <arvid@libtorrent.org>
Date: Fri, 27 Aug 2010 03:15:32 +0000
Subject: [PATCH] added script to parse profiling samples

---
 parse_sample.py | 82 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 parse_sample.py

diff --git a/parse_sample.py b/parse_sample.py
new file mode 100644
index 000000000..43a32dede
--- /dev/null
+++ b/parse_sample.py
@@ -0,0 +1,82 @@
+import sys
+
+# to use this script, first run 'sample' to sample your libtorrent based process
+# the output can then be passed to this script to auto-fold call stacks at
+# relevant depths and to filter out low sample counts
+f = open(sys.argv[1])
+
+def parse_line(l):
+	indentation = 0
+	while indentation < len(l) and l[indentation] == ' ':
+		indentation += 1
+	if indentation == 0:
+		return (0, 0, '')
+
+
+	l = l.strip().split(' ')
+	samples = int(l[0])
+	fun = ' '.join(l[1:])
+
+	return (indentation, samples, fun)
+
+fold = -1
+
+try:
+	sample_limit = int(sys.argv[2])
+except:
+	sample_limit = 5
+
+fun_samples = {}
+
+for l in f:
+	if 'Sort by top of stack' in l: break
+
+	indentation, samples, fun = parse_line(l)
+	if samples < sample_limit: continue
+	if fold != -1 and indentation > fold: continue
+	fold = -1
+
+	if '__gnu_cxx::__normal_iterator<' in fun:
+		fold = indentation - 1
+		continue
+
+	if 'boost::_bi::bind_t' in fun: continue
+	if 'boost::_bi::list' in fun: continue
+	if 'boost::_mfi::mf' in fun: continue
+#	if '' in fun: continue
+
+# should only add leaves
+	if fun in fun_samples: fun_samples[fun] += samples
+	else: fun_samples[fun] = samples
+
+	output = '%s%-4d %s' % (' ' * (indentation/2), samples, fun)
+	if len(output) > 200: output = output[0:200]
+	print output
+
+	if 'invariant_checker_impl' in fun: fold = indentation
+	if '::find_POD' in fun: fold = indentation
+	if 'SHA1_Update' in fun: fold = indentation
+	if 'boost::detail::function::basic_vtable' in fun: fold = indentation
+	if 'operator new' in fun: fold = indentation
+	if 'malloc' == fun: fold = indentation
+	if 'free' == fun: fold = indentation
+	if 'std::_Rb_tree' in fun: fold = indentation
+	if 'pthread_cond_wait' in fun: fold = indentation
+	if 'mp_exptmod' == fun: fold = indentation
+	if '::check_invariant()' in fun: fold = indentation
+	if 'libtorrent::condition::wait' in fun: fold = indentation
+	if 'libtorrent::sleep' in fun: fold = indentation
+	if 'puts' == fun: fold = indentation
+	if 'boost::asio::basic_stream_socket' in fun: fold = indentation
+	if 'recvmsg' in fun: fold = indentation
+	if 'sendmsg' in fun: fold = indentation
+	
+list = []
+for k in fun_samples:
+	list.append((fun_samples[k], k))
+
+list = sorted(list, reverse=True)
+
+for i in list:
+	print '%-4d %s' % (i[0], i[1])
+