[GHC] #2591: Explain +RTS -xt output text

[GHC]

#2591: Explain +RTS -xt output text
------------------------------+---------------------------------------------
    Reporter:  igloo          |       Owner:  igloo  
        Type:  bug            |      Status:  new    
    Priority:  normal         |   Milestone:  6.10.1 
   Component:  Documentation  |     Version:  6.8.3  
    Severity:  normal         |    Keywords:         
  Difficulty:  Unknown        |    Testcase:         
Architecture:  Unknown        |          Os:  Unknown
------------------------------+---------------------------------------------
 The user guide should explain the meaning of all this:
 {{{
 Main +RTS -p -s -xt -hc
 1,372,408,024 bytes allocated in the heap
 121,255,600 bytes copied during GC (scavenged)
   6,584,692 bytes copied during GC (not scavenged)
   2,768,896 bytes maximum residency (68 sample(s))

        2649 collections in generation 0 (  1.11s)
          68 collections in generation 1 (  0.49s)

           6 Mb total memory in use

   INIT  time    0.00s  (  0.00s elapsed)
   MUT   time    5.97s  (  6.63s elapsed)
   GC    time    1.60s  (  1.88s elapsed)
   RP    time    0.00s  (  0.00s elapsed)
   PROF  time    0.19s  (  0.20s elapsed)
   EXIT  time    0.00s  (  0.00s elapsed)
   Total time    7.76s  (  8.71s elapsed)

   %GC time      20.6%  (21.5% elapsed)

   Alloc rate    229,946,873 bytes per MUT second

   Productivity  76.9% of total user, 68.5% of total elapsed
 }}}

 Originally requested here: http://www.haskell.org/pipermail/haskell-
 cafe/2007-January/021350.html

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2591>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler