Optimizing the performance of the Scheduler in the Kernel 3.0

Greetings, <kernelnewbies@kernelnewbies.org> I want to optimize the performance of the scheduler in the Kernel 3.0 in order to increase the number of calls a Sip proxy server can handle. I read about the scheduler in the Kernel 2.6 and was able to find the variables MIN_TIMESLICE, MAX_TIMESLICE, PRIO_BONUS_RATIO, MAX_SLEEP_AVG and STARVATION_LIMIT. If I tune this variables I can tweak the performance of the scheduler, but in the new kernel I cant find any documentation that allows to successfully modify the scheduler. I would gladly appreciate any information related to the scheduler in the new kernel, or documentation about the new variables that are similar to the ones I mentioned. Thanks in advance for your time. Edward Alvarez.