diff options
Diffstat (limited to 'V8Binding/v8/tools/process-heap-prof.py')
-rwxr-xr-x | V8Binding/v8/tools/process-heap-prof.py | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/V8Binding/v8/tools/process-heap-prof.py b/V8Binding/v8/tools/process-heap-prof.py new file mode 100755 index 0000000..b8ab2d3 --- /dev/null +++ b/V8Binding/v8/tools/process-heap-prof.py @@ -0,0 +1,73 @@ +#!/usr/bin/env python +# +# Copyright 2009 the V8 project authors. All rights reserved. +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions are +# met: +# +# * Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# * Redistributions in binary form must reproduce the above +# copyright notice, this list of conditions and the following +# disclaimer in the documentation and/or other materials provided +# with the distribution. +# * Neither the name of Google Inc. nor the names of its +# contributors may be used to endorse or promote products derived +# from this software without specific prior written permission. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +# This is an utility for converting V8 heap logs into .hp files that can +# be further processed using 'hp2ps' tool (bundled with GHC and Valgrind) +# to produce heap usage histograms. + +# Sample usage: +# $ ./shell --log-gc script.js +# $ tools/process-heap-prof.py v8.log | hp2ps -c > script-heap-graph.ps +# ('-c' enables color, see hp2ps manual page for more options) + +import csv, sys, time + +def process_logfile(filename): + first_call_time = None + sample_time = 0.0 + sampling = False + try: + logfile = open(filename, 'rb') + try: + logreader = csv.reader(logfile) + + print('JOB "v8"') + print('DATE "%s"' % time.asctime(time.localtime())) + print('SAMPLE_UNIT "seconds"') + print('VALUE_UNIT "bytes"') + + for row in logreader: + if row[0] == 'heap-sample-begin' and row[1] == 'Heap': + sample_time = float(row[3])/1000.0 + if first_call_time == None: + first_call_time = sample_time + sample_time -= first_call_time + print('BEGIN_SAMPLE %.2f' % sample_time) + sampling = True + elif row[0] == 'heap-sample-end' and row[1] == 'Heap': + print('END_SAMPLE %.2f' % sample_time) + sampling = False + elif row[0] == 'heap-sample-item' and sampling: + print('%s %d' % (row[1], int(row[3]))) + finally: + logfile.close() + except: + sys.exit('can\'t open %s' % filename) + +process_logfile(sys.argv[1]) |