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Re: Fwd: Questions on PA machine description?


  In message <36FC0238.64F67851@americasm01.nt.com>you write:
  > So after applying the adjust_cost to 0 for pa8000, I didn't see any
  > identifiable change in performance.  I bootstrapped with the change in
  > place, but no difference in the speed of gcc, or in my code.
I'm hoping to get in a spec run with that patch this weekend.  I'm also
hoping to get in a spec run on an 7100lc with your other patch this weekend.

  > Would it be a good idea to try setting load/store delay to 0 as well?
I'm not sure yet.  The information I've got isn't real clear on how best to
deal with memory latency.  With the lack of solid info on this, we might be
best off with a 100% pragmatic approach -- try both and if one wins, select
it.  (and hope that it's not performance neutral :-)

jeff