Re: [GHC] #9105: Profiling binary consumes CPU even when idle on Linux.

#9105: Profiling binary consumes CPU even when idle on Linux. -------------------------------------+------------------------------------- Reporter: robinp | Owner: bgamari Type: bug | Status: patch Priority: normal | Milestone: Component: Runtime System | Version: 7.8.2 Resolution: | Keywords: Operating System: Linux | Architecture: x86 Type of failure: Runtime | Test Case: performance bug | Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D1822 Wiki Page: | -------------------------------------+------------------------------------- Comment (by Ben Gamari ): In [changeset:"b01288d509b0f9e45f23ae48f2366f85f489089c/ghc" b01288d/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="b01288d509b0f9e45f23ae48f2366f85f489089c" rts: Disable tick timer unless really needed Trac #9105 notes significant CPU usage by an otherwise idle process when compiled with profiling. The reason for this is that we keep the tick timer active in the profiling RTS even if profiling wasn't requested at runtime. If the user requests any sort of profiling then we need to keep the timer active to ensure that samples are collected. Test Plan: Validate, check CPU usage, ensure profiling still works Reviewers: simonmar, austin Reviewed By: simonmar, austin Subscribers: thomie Differential Revision: https://phabricator.haskell.org/D1822 GHC Trac Issues: #9105 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9105#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler