Android开机问题分析工具Bootchart使用方法(一)

• 安装环境

linux下执行
sudo apt-get install bootchart
sudo apt-get install pybootchartgui

• 修改代码

当执行发生一下错误提示后

parsing 'bootchart/bootchart.tgz'
parsing 'header'
parsing 'proc_diskstats.log'
parsing 'proc_ps.log'
warning: no parent for pid '2' with ppid '0'
parsing 'proc_stat.log'
merged 0 logger processes
pruned 223 process, 0 exploders, 13 threads, and 1 runs
False
Traceback (most recent call last):
  File "/usr/bin/bootchart", line 23, in <module>
    sys.exit(main())
  File "/usr/lib/python2.7/dist-packages/pybootchartgui/main.py", line 137, in main
    render()
  File "/usr/lib/python2.7/dist-packages/pybootchartgui/main.py", line 128, in render
    batch.render(writer, res, options, filename)
  File "/usr/lib/python2.7/dist-packages/pybootchartgui/batch.py", line 41, in render
    draw.render(ctx, options, *res)
  File "/usr/lib/python2.7/dist-packages/pybootchartgui/draw.py", line 282, in render
    draw_chart(ctx, IO_COLOR, True, chart_rect, [(sample.time, sample.util) for sample in disk_stats], proc_tree)
  File "/usr/lib/python2.7/dist-packages/pybootchartgui/draw.py", line 201, in draw_chart
    yscale = float(chart_bounds[3]) / max(y for (x,y) in data)
ZeroDivisionError: float division by zero

修改下列代码内容(位于python安装目录下)

draw.py
将200， 201行由： 
 xscale = float(chart_bounds[2]) / max(x for (x,y) in data)
 yscale = float(chart_bounds[3]) / max(y for (x,y) in data)
 改为： 
 xscale = float(chart_bounds[2]) / max(0.00001, max(x for (x,y) in data))
 yscale = float(chart_bounds[3]) / max(0.00001, max(y for (x,y) in data))

parsing.py：
 在156行后添加： 
 if interval == 0:
 interval = 1
 修改后如下： 
 sums = [ a - b for a, b in zip(sample1.diskdata, sample2.diskdata) ]
 if interval == 0:
 interval = 1

 samples.py：
 在81行后添加： 
 if interval == 0:
 interval = 1
 修改后如下： 
 def calc_load(self, userCpu, sysCpu, interval):
 if interval == 0: 
 interval = 1