add session measurement
add session measurement

zhuxiangkui/erl_tool,wcy123/erl_tool,zhangchaoeasemob/erl_tool,wcy123/erl_tool,zhangchaoeasemob/erl_tool,zhangchaoeasemob/erl_tool,zhuxiangkui/erl_tool,zhuxiangkui/erl_tool,zhangchaoeasemob/erl_tool,wcy123/erl_tool,wcy123/erl_tool,zhuxiangkui/erl_tool,zhuxiangkui/erl_tool,zhangchaoeasemob/erl_tool,wcy123/erl_tool