#12573: Allow the user to pick the address that the RTS reserves for the heap -------------------------------------+------------------------------------- Reporter: bitonic | Owner: Type: feature request | Status: new Priority: normal | Milestone: 8.0.2 Component: Runtime System | Version: 8.0.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by tmcdonell): @bitonic my current (partially working) solution is to use an `__attribute__((constructor))` function to `mmap` the region that CUDA/OpenCL requires before the RTS initialises. The RTS will then avoid it and you can `munmap` it right before initialising CUDA/OpenCL: https://github.com/tmcdonell/cuda/blob/hotfix/ghc-8/cbits/init.c You can also initialise OpenCL directly in the constructor function, but then you'll spin up the GPU many times during compilation/haddock (every time a package loads your library). (This is simpler and what the master branch of the above repo does, actually.) Both those approaches work for compiled programs, but not in ghci, and I haven't had a chance to dig to the bottom of it yet. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12573#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler