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#!/usr/bin/env python3
# Copyright 2016 The Emscripten Authors. All rights reserved.
# Emscripten is available under two separate licenses, the MIT license and the
# University of Illinois/NCSA Open Source License. Both these licenses can be
# found in the LICENSE file.
import json
import os
import shutil
import sys
import tempfile
import time
profiler_logs_path = os.path.join(tempfile.gettempdir(), 'emscripten_toolchain_profiler_logs')
# If set to 1, always generates the output file under the same filename and doesn't delete the temp data.
DEBUG_EMPROFILE_PY = 0
OUTFILE = 'toolchain_profiler.results_' + time.strftime('%Y%m%d_%H%M')
for arg in sys.argv:
if arg.startswith('--outfile='):
OUTFILE = arg.split('=', 1)[1].strip().replace('.html', '')
# Deletes all previously captured log files to make room for a new clean run.
def delete_profiler_logs():
try:
shutil.rmtree(profiler_logs_path)
except IOError:
pass
def list_files_in_directory(d):
files = []
try:
items = os.listdir(d)
for i in items:
f = os.path.join(d, i)
if os.path.isfile(f):
files += [f]
return files
except IOError:
return []
def create_profiling_graph():
log_files = [f for f in list_files_in_directory(profiler_logs_path) if 'toolchain_profiler.pid_' in f]
all_results = []
if len(log_files):
print('Processing ' + str(len(log_files)) + ' profile log files in "' + profiler_logs_path + '"...')
for f in log_files:
try:
json_data = open(f, 'r').read()
lines = json_data.split('\n')
lines = [x for x in lines if x != '[' and x != ']' and x != ',' and len(x.strip())]
lines = [(x + ',') if not x.endswith(',') else x for x in lines]
lines[-1] = lines[-1][:-1]
json_data = '[' + '\n'.join(lines) + ']'
all_results += json.loads(json_data)
except Exception as e:
print(str(e), file=sys.stderr)
print('Failed to parse JSON file "' + f + '"!', file=sys.stderr)
sys.exit(1)
if len(all_results) == 0:
print('No profiler logs were found in path "' + profiler_logs_path + '". Try setting the environment variable EM_PROFILE_TOOLCHAIN=1 and run some emcc commands, and then rerun "python emprofile.py --graph" again.')
return
all_results.sort(key=lambda x: x['time'])
json_file = OUTFILE + '.json'
open(json_file, 'w').write(json.dumps(all_results, indent=2))
print('Wrote "' + json_file + '"')
html_file = OUTFILE + '.html'
html_contents = open(os.path.join(os.path.dirname(os.path.realpath(__file__)), 'toolchain_profiler.results_template.html'), 'r').read().replace('{{{results_log_file}}}', '"' + json_file + '"')
open(html_file, 'w').write(html_contents)
print('Wrote "' + html_file + '"')
if not DEBUG_EMPROFILE_PY:
delete_profiler_logs()
if len(sys.argv) < 2:
print('''Usage:
emprofile.py --reset
Deletes all previously recorded profiling log files.
emprofile.py --graph
Draws a graph from all recorded profiling log files.
Optional parameters:
--outfile=x.html
Specifies the name of the results file to generate.
''')
sys.exit(1)
if '--reset' in sys.argv:
delete_profiler_logs()
elif '--graph' in sys.argv:
create_profiling_graph()
else:
print('Unknown command "' + sys.argv[1] + '"!')
sys.exit(1)
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