Re: [GHC] #14257: Heap profiling with ghc and hp2ps and strict function application ($!) gives samples out of sequence (regression)

20 Sep 2017

      #14257: Heap profiling with ghc and hp2ps and strict function application ($!)
gives samples out of sequence (regression)
-------------------------------------+-------------------------------------
        Reporter:  carlostome        |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Runtime System    |              Version:  8.2.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #14006            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by bgamari):

 Indeed I can reproduce this verbatim. Interestingly enough, the sample in
 question is at the very end up the `hp` file and has no cost centers in
 it,
 {{{
 ...
 BEGIN_SAMPLE 0.455729
 MAIN    160
 (198)GHC.IO.Handle.FD.CAF       680
 (218)GHC.Conc.Signal.CAF        640
 (225)main       152
 (223)Main.CAF   16
 (206)GHC.IO.Encoding.Iconv.CAF  120
 (208)GHC.IO.Encoding.CAF        1096
 (114)PINNED     36816
 END_SAMPLE 0.455729
 BEGIN_SAMPLE 0.455359
 END_SAMPLE 0.455359
 }}}

-- 
Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14257#comment:1
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