#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.wall...@…):
I was certainly under the impression that if you specify no "-i" RTS
option at all, then a heap census is taken only at the naturally-occuring
GC breaks. (At least, this is the way it worked in hbc and nhc, the first
compilers to support profiling.) The ghc manual (section 5.4.1) is
possibly misleading here, since it suggests that the default sampling
interval is 0.1 seconds. I believe it ought to say that if the "-i"
option is given, but with no argument, then the default sampling interval
is as stated. Otherwise, sampling is not on a regular ticking clock, but
during GC.
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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4225#comment:4>
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