[Haskell-cafe] Using PAPI to measure performance with CPU events

[Alexey Rodriguez Yakushev]

Dear all,

I have added a page to the GHC commentary explaining how to use the  
PAPI library together with GHC to gather performance information from  
your CPU (cache misses, branch misprediction). At present only cache  
miss information is supported in a platform independent way (though  
not tested). Also, this implementation separates the performance  
information for the garbage collector and the mutator so it is quite  
useful if you are implementing an optimisation.

The page also has some patches to use PAPI on the nofib suite. These  
patches are eventually going to make it into the HEAD, but I thought  
someone might find them useful meanwhile.

Cheers,

Alexey