在生产IIS7.5上配置ASP.NET应用程序CPU使用情况

I am hosting ASP.NET MVC 3 web application on IIS7.5 web server. After several hours application pool start using all three CPU cores and usage goes to 100%. I would like to know where is performance bottleneck and where CPU spend most time in code. I am hosting ASP.NET MVC 3 web application on I