Revision 71cb0a081bf5e98368406fe76dc8f74c9a5aac88 authored by B2G Bumper Bot on 26 May 2014, 09:13:00 UTC, committed by B2G Bumper Bot on 26 May 2014, 09:13:00 UTC
1 parent 095b31a
merge-profiles.py
#!/usr/bin/env python
#
# This script takes b2g process profiles and merged them into a single profile.
# The meta data is taken from the first profile. The startTime for each profile
# is used to syncronized the samples. Each thread is moved into the merged
# profile.
#
import json
import re
import sys
def MergeProfiles(files):
threads = []
fileData = []
symTable = dict()
meta = None
libs = None
minStartTime = None
for fname in files:
match = re.match('profile_([0-9]+)_(.+)\.sym', fname)
if match is None:
raise Exception("Filename '" + fname + "' doesn't match expected pattern")
pid = match.groups(0)[0]
pname = match.groups(0)[1]
fp = open(fname, "r")
fileData = json.load(fp)
fp.close()
if meta is None:
meta = fileData['profileJSON']['meta'].copy()
libs = fileData['profileJSON']['libs']
minStartTime = meta['startTime']
else:
minStartTime = min(minStartTime, fileData['profileJSON']['meta']['startTime'])
meta['startTime'] = minStartTime
for thread in fileData['profileJSON']['threads']:
thread['name'] = thread['name'] + " (" + pname + ":" + pid + ")"
threads.append(thread)
# Note that pid + sym, pid + location could be ambigious
# if we had pid=11 sym=1 && pid=1 sym=11. To avoid this we format
# pidStr with leading zeros.
pidStr = "%05d" % (int(pid))
thread['startTime'] = fileData['profileJSON']['meta']['startTime']
samples = thread['samples']
for sample in thread['samples']:
for frame in sample['frames']:
if "location" in frame and frame['location'][0:2] == '0x':
frame['location'] = pidStr + frame['location']
filesyms = fileData['symbolicationTable']
for sym in filesyms.keys():
symTable[pidStr + sym] = filesyms[sym]
# For each thread, make the time offsets line up based on the
# earliest start
for thread in threads:
delta = thread['startTime'] - minStartTime
for sample in thread['samples']:
if "time" in sample:
sample['time'] += delta
result = dict()
result['profileJSON'] = dict()
result['profileJSON']['meta'] = meta
result['profileJSON']['libs'] = libs
result['profileJSON']['threads'] = threads
result['symbolicationTable'] = symTable
result['format'] = "profileJSONWithSymbolicationTable,1"
json.dump(result, sys.stdout)
if len(sys.argv) > 1:
MergeProfiles(sys.argv[1:])
sys.exit(0)
print "Usage: merge-profile.py profile_<pid1>_<pname1>.sym profile_<pid2>_<pname2>.sym > merged.sym"
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