Wrok Flow

• opt0: rearrange assembly instructions
• opt1: sunk all miss blocks
• opt2: move redundant dirty stores to slow path
• opt3: victim tlb cache
• could have variations
• opt4: cross-page block linking
• opt5: indirect branch target caching
• opt6: enlarge TLB table size
• opt7: TLB mini buffer to reduce fast path cycles;  probably failed, 

=============================================================

• performance reduction?
• baseline performance?
• code_read TLB access defined in exec-all.h
• quick thought as follows
• split code access and data access, similar to i-Cache and d-Cache
• Not worth it, too much work, too little gain.
• move redundant stores to miss block:
• restore clobber flag for qemu_ld and qemu_st
• so before qemu_ld/st, dirty states will now be stored back to memory.
• and we only need to store that is NOT redundant.
• This is true for globals, what about temporaries?
• ABOUT temporaries: we only need to store temporaries in miss block.
• We store temporary variables in miss block.
• We only need to consider global variables.
• DO IT!
• Optimization 2: Boot Test:
• opt2: OK
• opt2+opt4: OK
• opt1+opt2+opt4:OK
• opt1+opt2+opt3+opt4:OK, NOT SO SURE....
• opt1+opt2+opt3+opt4+opt5: NOT OK
• opt3: OK