timeline_fps.py

import json
import sys

F = sys.argv[1]
print(F)

#F = "just60.json"
#F = "c-asus_nvidia.json"
#F = TimelineRawData-20160412T120624.json"

f = open(F)
d = f.read()
j = json.loads(d)

frames = {}
fidxs = []

for l in j:
        ts = int(l['ts'])
        #if l['cat'] == 'toplevel':
        #if l['name'] == 'GPUTask':
        n = l['name'] 
        if n == 'BeginMainThreadFrame':
                fid = int(l['args']['data']['frameId'])
                frames[fid] = ts
                fidxs.append(fid)

fidxs.sort()

durs = []

prev_ts = -1
for fid in fidxs:
        f = frames[fid]
        #print(f)
        if prev_ts > -1:
                dur = f - prev_ts
                #print(dur, fid)
                if (dur > 0): #sanity filter
                        durs.append(dur)
                #if dur < 16000:
                #       print(l)
        prev_ts = f

print("---")
total = len(durs)
print("Frames total: %d" % total)

cats = [0, 0, 0, 0, 0]
tottime = 0
for d in durs:
        if d < 17000:
                catidx = 0
        elif d > 200000:
                catidx = 4
        elif d > 100000:
                catidx = 3
        elif d > 33333:
                catidx = 2
        else:
                catidx = 1

        cats[catidx] += d
        tottime += d

print("Total time:", tottime)

def printperc(desc, cattime):
        print(desc, cattime, cattime / tottime)

printperc("~ 60 FPS:", cats[0])
printperc("30 - ~60:", cats[1])
printperc("< 30 FPS:", cats[2])
printperc("< 10 FPS:", cats[3])
printperc("<  5 FPS:", cats[4])