[GHC] #4225: RTS option to remove profiling overhead from heap profile time stamps

[GHC]

#4225: RTS option to remove profiling overhead from heap profile time stamps
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    Reporter:  ClaudiusMaximus   |       Owner:              
        Type:  feature request   |      Status:  new         
    Priority:  normal            |   Component:  Profiling   
     Version:  6.12.3            |    Keywords:              
          Os:  Unknown/Multiple  |    Testcase:              
Architecture:  Unknown/Multiple  |     Failure:  None/Unknown
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Comment(by malcolm.wallace@…):

 I believe that the runtime system, when gathering a census for profiling
 at GC time, disables the timer and re-enables it again after the census is
 complete.  This is specifically to eliminate the overheads of profiling
 from the resulting graph.  If something has changed to break this
 property, then it should be fixed in the RTS, not post-processed away by
 hp2ps.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4225#comment:1>
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