Branching, instruction-miss and prefetcher event counters

Hi, would somebody be able to tell me which event counters I should add to a custom analysis for the following:

1) How successful the prefetcher is

2) L1 Instruction cache misses

3) Pipeline stalls regardless of cause

4) Direct Branch mispredictions

5) Indirect Branch mispredictions

Also, what is the difference between event names with and without the _PS, like:

BR_MISP_RETIRED.ALL_BRANCHES

BR_MISP_RETIRED.ALL_BRANCHES_PS

Thank you in advance,