#13497: GHC does not use select()/poll() correctly on non-Linux platforms -------------------------------------+------------------------------------- Reporter: nh2 | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 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: #8684, #12912 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by nh2): Hmm, this seems to happen on purpose: Commit [https://github.com/ghc/ghc/commit/0b79d5cd4687dacf7efd430df7fba9d9a5a5ce32 Another overhaul of the recent_activity / idle GC handling] (#5991) mentions {{{ - we now turn off the timer signal after idleGCDelay even if the idle GC is disabled with +RTS -I0. }}} I personally find that very confusing, using a setting called `idleGCDelay` even when the user explicitly turned that off. Further, doing it this way, there's no way of actually setting what the value of `idleGCDelay` is, because if you use `-I0`, well, then it's the default (0.3 seconds), and if you use `-I` with any other value, then that actually turns idle GC on (as I found above). So there's no way to change away from the default 0.3 seconds when idle GC is set to off. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13497#comment:10 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler