#7952: Can cost-centre annotations be included in -ddump-simpl?
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Reporter: nr | Owner:
Type: feature request | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 7.6.3
Keywords: Core | Os: Unknown/Multiple
Architecture: Unknown/Multiple | Failure: None/Unknown
Difficulty: Unknown | Testcase:
Blockedby: | Blocking:
Related: |
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Changes (by simonpj):
* cc: simonmar (added)
* difficulty: => Unknown
Comment:
I'm not terribly up to speed with the state of cost-centre profiling.
In general, the cost centre (or cost-centre stack) to which a `let`
allocation is attributed is a ''dyanamic'' property; it depends on the
caller of the current function. (Eg to which cost centre are the thunks
allocated by `map` attributed? Answer: the caller.) So it's not clear
that your question has a meaningful answer.
Simon Marlow will know the current state of affairs, and embarrassingly I
can't even point to a document that I am sure reflects the current state
of affairs. Maybe Simon can.
The whole area is in need of love and attention from someone who (a) has
excellent operational intuitions, and (b) takes a strongly principled
approach. Norman Ramsey comes to mind.
Simon
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7952#comment:1>
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