On 17/04/2012 16:22, Herbert Valerio Riedel wrote:

Jurriaan Hage writes:

...

from the RTS option -s I get :

INIT time 0.00s ( 0.00s elapsed) MUT time 329.99s (940.55s elapsed) GC time 745.91s (751.51s elapsed) RP time 765.76s (767.76s elapsed) PROF time 359.95s (362.12s elapsed) EXIT time 0.00s ( 0.00s elapsed)

I can guess what most components mean, but do not know what RP stands for.

afaik RP stands for "retainer profiling", see

http://www.haskell.org/ghc/docs/7.4.1/html/users_guide/prof-heap.html#retain...

Yes, RP is the amount of time the RTS spent doing retainer profiling. Retainer profiling is a separate pass over the heap in addition to the usual heap census, which is recorded as PROF in the stats. Cheers, Simon