Performance bug: scalability problems on LVish sched not seen on Trace

iu-parfunc / lvars

The LVish Haskell library

http://hackage.haskell.org/package/lvish

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Performance bug: scalability problems on LVish sched not seen on Trace #50

Open rrnewton opened 10 years ago

rrnewton commented 10 years ago

For example consider the nbody benchmark:

[LVish sched] http://goo.gl/SPilMn
[monad-par sched] http://goo.gl/BrtfHP

This could conceivably be related to the excessive work-duplication bug (#28). We need to dig deeper.

rrnewton commented 10 years ago

Debugging strategy: run a full test suite with GET_ONCE turned on (on master). This will help see if the bad behavior has anything to do with work duplication.