[GHC] #13362: GHC first generation of GC to be as large as largest cache size by default

[GHC]

#13362: GHC first generation of GC to be as large as largest cache size by default
-------------------------------------+-------------------------------------
        Reporter:  varosi            |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Runtime System    |              Version:  8.0.2
      Resolution:                    |             Keywords:  numa cache gc
                                     |  newcomers
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Runtime           |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by varosi):

 For nursery may be there is no such deal, but see a benchmark made on a
 small raytracer (https://bitbucket.org/varosi/cgraytrace/overview) that do
 a lot of allocations on two different machines:

 https://docs.google.com/spreadsheets/d/1dnhQTrm_EgKab3IJQAC4Rw1IJOfOcryJ56W0z9aeo0k/edit?usp=sharing

 There is a clear difference for different GC sizes. As sizes grow beyond
 times of needed memory GC is almost not used and then the benefit of
 larger GC is brought back.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13362#comment:7>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler