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-rwxr-xr-xtools/perf/scripts/python/stackcollapse.py10
1 files changed, 6 insertions, 4 deletions
diff --git a/tools/perf/scripts/python/stackcollapse.py b/tools/perf/scripts/python/stackcollapse.py
index 5a605f70ef32..b1c4def1410a 100755
--- a/tools/perf/scripts/python/stackcollapse.py
+++ b/tools/perf/scripts/python/stackcollapse.py
@@ -1,4 +1,5 @@
# stackcollapse.py - format perf samples with one line per distinct call stack
+# SPDX-License-Identifier: GPL-2.0
#
# This script's output has two space-separated fields. The first is a semicolon
# separated stack including the program name (from the "comm" field) and the
@@ -18,13 +19,15 @@
# Written by Paolo Bonzini <pbonzini@redhat.com>
# Based on Brendan Gregg's stackcollapse-perf.pl script.
+from __future__ import print_function
+
import os
import sys
from collections import defaultdict
from optparse import OptionParser, make_option
sys.path.append(os.environ['PERF_EXEC_PATH'] + \
- '/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
+ '/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
from perf_trace_context import *
from Core import *
@@ -119,7 +122,6 @@ def process_event(param_dict):
lines[stack_string] = lines[stack_string] + 1
def trace_end():
- list = lines.keys()
- list.sort()
+ list = sorted(lines)
for stack in list:
- print "%s %d" % (stack, lines[stack])
+ print("%s %d" % (stack, lines[stack]))