I am new to opensta and i want to do perfomance testing for our application on the basis of the below points.
1)I want to login into the application with 100 different users with different credentials.The username and password must be in some datapool.

)need to know the performance for each step,like how much time taken in login into application,time taken to select records,time taken while opening the screen.

For ex:
user1 password1 record1
user2 password2 record2

All this data needs to be read from a file.