#13164: idle time full GCs (idle cpu usage) -------------------------------------+------------------------------------- Reporter: lspitzner | Owner: Type: feature request | Status: new Priority: normal | Milestone: Component: Runtime System | Version: 8.0.1 Resolution: | Keywords: idle GC 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 lspitzner): I just noticed that this means that you do not get deadlock detection if you forkIO (forever (threadDelay 100000)). That's interesting. You are right, I was focused on GC performance instead of deadlock detection because the latter was not even mentioned when i chatted with rwbarton. Maybe he can comment on this. Even for deadlock detection it makes sense to delay things based on the cost of the full GCs. (I'd rather have to wait 15secs to get the deadlock detected when I manage to create deadlocks than constantly be wasting CPU time - but if full GCs are cheap, I would not mind quicker detection.) -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13164#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler