Tuning the Linux Kernel’s Completely Fair Schedule

After hours of searching the Web, I have found nothing that really sheds a whole lot of light on the subject of tuning CFS. Most of the pages on the Web refer to CFS as it was in version 2.6.23 of the Linux kernel. Most web pages do not provide accurate information. I really wonder about the system administrator who could not  understand why he was unable create a directory or file in the /proc directory. While I do not know the the best set of values for the tuneable parameters, I can, hopefully,  shed some light on the subject.