Re: [GHC] #8611: nofib’s cacheprof’s allocations nondeterminisitic

GHC ghc-devs at haskell.org
Fri Dec 14 16:52:54 UTC 2018


#8611: nofib’s cacheprof’s allocations nondeterminisitic
-------------------------------------+-------------------------------------
        Reporter:  nomeata           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  NoFib benchmark   |              Version:  8.5
  suite                              |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by sgraf):

 * cc: sgraf (added)


Comment:

 Although serialising and deserialising the result of `with_ccs` gets rid
 of the non-determinism in total allocations AFAICT (using Read/Show is
 pretty slow, so I only did ~20 iterations), the average residency/number
 of samples seems to vary by one (23 vs. 24). Not sure if it's important.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8611#comment:6>
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