#5474: Add facility for emitting heap profile marker
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Reporter: hvr | Owner:
Type: feature request | Status: new
Priority: normal | Component: Profiling
Version: | Keywords:
Testcase: | Blockedby:
Os: Unknown/Multiple | Blocking:
Architecture: Unknown/Multiple | Failure: None/Unknown
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When analysing heap profile diagrams I often want correlate certain points
in the program execution with the corresponding point in the heap
profiling diagram.
Currently, I resort to causing ''flatlines'' by burning cpu cycles with
some dummy calculations which don't cause too much GC activity. But this
is just a crutch, and doesn't work too well for concurrent/parallel
Haskell programs.
It would be helpful to have a GHC facility to emit custom marker "events"
(maybe with an user-suppliable associated numeric identifier to
differentiate between multiple markers) to the heap-profile which could
then be directly looked up in the resulting heap profile diagram (rather
than having to recognize geometric graph features in the diagram).
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5474>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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