[GHC] #10247: 5x increase in total memory allocation for `prof-doc-fib` test since 2011

[GHC]

#10247: 5x increase in total memory allocation for `prof-doc-fib` test since 2011
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        Reporter:  thomie            |                   Owner:
            Type:  task              |                  Status:  new
        Priority:  high              |               Milestone:
       Component:  Profiling         |                 Version:  7.10.1
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:
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Comment (by rwbarton):

 I tried running the tests with 7.8.4 since I don't have HEAD built with
 profiling libraries at the moment.

 I see almost exactly 2x factors on T680, prof-doc-last, and scc003. I also
 notice that these prof files are all from Oct 25-27 2011. Probably they
 were just generated on a 32-bit processor?

 For prof-doc-fib I notice that the profiling output changed in a recent
 (not in 7.8.4) commit daed18c35cda114d8a5303bcb645195e1fd397e3, and the
 old file agrees with the above. That is, it showed almost exactly half the
 total allocation that I see, and it is from the same date range.

 So there seems to be no alarm through 7.8.4. I'll try HEAD to see if there
 is any change.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10247#comment:1>
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