Re: [Haskell-cafe] Unrecognized function symbols in .prof

On Tuesday 08 February 2011 22:18:14, Roman Cheplyaka wrote:

* Iavor Diatchki [2011-02-07 23:45:58-0800]

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Another option would be to look at the generated core by using -ddump-simpl when compiling. This will generate a whole bunch of output, which you can redirect to a file and the search for the mysterious symbols inside.

IIRC they are generated at random each time.

Yes, but if you -ddump-simpl the profiling compilation, the profiling symbols should be those in the generated core, shouldn't they? Unfortunately, that won't help Lee since his mysterious symbols come from a library (unless he goes to the trouble of unpacking the library and recompiling it in his source tree to get the symbols).

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On Mon, Feb 7, 2011 at 11:12 PM, Lee Pike wrote:

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Hi,

I am profiling a Haskell program using GHC, and after executing the program with +RTS -p, I get a .prof file that lists the cost centers of the program.  Some of the cost centers listed are for function symbols that do not exist in the given module.  For example, I have in my .prof file:

COST CENTRE              MODULE   %time %alloc ==_a2MT                        Foo           19.8    0.0 ==_a2R8                         Foo           17.8    0.0 ==_a2Bg                         Bar           13.7    0.0