You as a Storage Admin won't be analyzing autosupport as it is too cumbersome. NetApp support actually analyzes it using internal tools that will parse the required data in a more readable manner. If you want to troubleshoot CIFS data info, you have to use different commands related to CIFS.
Send or upload the perfstats zip files to netapp and netapp will use a program called (LATEX or LATX) to parse and provides you the analysis.
If you really have performance issues, obviously hire the professional services engineer to analyze and define the bottlenecks to you.
I guess you could also check the MyAutosupport site to get autosupport information in a more organized manner.
From there you can even extract an html file with all the information from the Autosupports that NetApp is receiving from your system.