1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/tools/profiler/merge-profiles.py Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,88 @@
1.4 +#!/usr/bin/env python
1.5 +#
1.6 +# This script takes b2g process profiles and merged them into a single profile.
1.7 +# The meta data is taken from the first profile. The startTime for each profile
1.8 +# is used to syncronized the samples. Each thread is moved into the merged
1.9 +# profile.
1.10 +#
1.11 +import json
1.12 +import re
1.13 +import sys
1.14 +
1.15 +def MergeProfiles(files):
1.16 + threads = []
1.17 + fileData = []
1.18 + symTable = dict()
1.19 + meta = None
1.20 + libs = None
1.21 + minStartTime = None
1.22 +
1.23 + for fname in files:
1.24 + match = re.match('profile_([0-9]+)_(.+)\.sym', fname)
1.25 + if match is None:
1.26 + raise Exception("Filename '" + fname + "' doesn't match expected pattern")
1.27 + pid = match.groups(0)[0]
1.28 + pname = match.groups(0)[1]
1.29 +
1.30 + fp = open(fname, "r")
1.31 + fileData = json.load(fp)
1.32 + fp.close()
1.33 +
1.34 + if meta is None:
1.35 + meta = fileData['profileJSON']['meta'].copy()
1.36 + libs = fileData['profileJSON']['libs']
1.37 + minStartTime = meta['startTime']
1.38 + else:
1.39 + minStartTime = min(minStartTime, fileData['profileJSON']['meta']['startTime'])
1.40 + meta['startTime'] = minStartTime
1.41 +
1.42 + for thread in fileData['profileJSON']['threads']:
1.43 + thread['name'] = thread['name'] + " (" + pname + ":" + pid + ")"
1.44 + threads.append(thread)
1.45 +
1.46 + # Note that pid + sym, pid + location could be ambigious
1.47 + # if we had pid=11 sym=1 && pid=1 sym=11.
1.48 + pidStr = pid + ":"
1.49 +
1.50 + thread['startTime'] = fileData['profileJSON']['meta']['startTime']
1.51 + samples = thread['samples']
1.52 + for sample in thread['samples']:
1.53 + for frame in sample['frames']:
1.54 + if "location" in frame and frame['location'][0:2] == '0x':
1.55 + oldLoc = frame['location']
1.56 + newLoc = pidStr + oldLoc
1.57 + frame['location'] = newLoc
1.58 + # Default to the unprefixed symbol if no translation is available
1.59 + symTable[newLoc] = oldLoc
1.60 +
1.61 + filesyms = fileData['symbolicationTable']
1.62 + for sym in filesyms.keys():
1.63 + symTable[pidStr + sym] = filesyms[sym]
1.64 +
1.65 + # For each thread, make the time offsets line up based on the
1.66 + # earliest start
1.67 + for thread in threads:
1.68 + delta = thread['startTime'] - minStartTime
1.69 + for sample in thread['samples']:
1.70 + if "time" in sample:
1.71 + sample['time'] += delta
1.72 +
1.73 + result = dict()
1.74 + result['profileJSON'] = dict()
1.75 + result['profileJSON']['meta'] = meta
1.76 + result['profileJSON']['libs'] = libs
1.77 + result['profileJSON']['threads'] = threads
1.78 + result['symbolicationTable'] = symTable
1.79 + result['format'] = "profileJSONWithSymbolicationTable,1"
1.80 +
1.81 + json.dump(result, sys.stdout)
1.82 +
1.83 +
1.84 +if len(sys.argv) > 1:
1.85 + MergeProfiles(sys.argv[1:])
1.86 + sys.exit(0)
1.87 +
1.88 +print "Usage: merge-profile.py profile_<pid1>_<pname1>.sym profile_<pid2>_<pname2>.sym > merged.sym"
1.89 +
1.90 +
1.91 +
