Re: [GHC] #1115: GHC concurrency runtime breaks every 497 (and a bit) days
#1115: GHC concurrency runtime breaks every 497 (and a bit) days +--- Reporter: Neil Davies | Owner: igloo Type: bug | Status: closed Priority: normal | Milestone: 6.6.1 Component: Runtime System |Version: 6.6 Severity: major | Resolution: fixed Keywords: | Difficulty: Moderate (1 day) Testcase: | Architecture: Unknown Os: Unknown | +--- Changes (by igloo): * resolution: = fixed * status: new = closed Comment: I've applied this patch, and another that does the same for Windows. -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/1115 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler___ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
Re: [GHC] #1115: GHC concurrency runtime breaks every 497 (and a bit) days
#1115: GHC concurrency runtime breaks every 497 (and a bit) days +--- Reporter: Neil Davies | Owner: igloo Type: bug | Status: new Priority: normal | Milestone: 6.6.1 Component: Runtime System |Version: 6.6 Severity: major | Resolution: Keywords: | Difficulty: Moderate (1 day) Testcase: | Architecture: Unknown Os: Unknown | +--- Changes (by igloo): * status: reopened = new * owner: Neil Davies = igloo -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/1115 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler___ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
Re: [GHC] #1115: GHC concurrency runtime breaks every 497 (and a bit) days
#1115: GHC concurrency runtime breaks every 497 (and a bit) days +--- Reporter: Neil Davies | Owner: Neil Davies Type: bug | Status: reopened Priority: normal | Milestone: 6.6.1 Component: Runtime System |Version: 6.6 Severity: major | Resolution: Keywords: | Difficulty: Moderate (1 day) Testcase: | Architecture: Unknown Os: Unknown | +--- Changes (by simonmar): * resolution: worksforme = * status: closed = reopened -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/1115 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler___ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
Re: [GHC] #1115: GHC concurrency runtime breaks every 497 (and a bit) days
#1115: GHC concurrency runtime breaks every 497 (and a bit) days +--- Reporter: Neil Davies | Owner: Neil Davies Type: bug | Status: closed Priority: normal | Milestone: 6.6.1 Component: Runtime System |Version: 6.6 Severity: major | Resolution: worksforme Keywords: | Difficulty: Moderate (1 day) Testcase: | Architecture: Unknown Os: Unknown | +--- Changes (by Neil Davies): * resolution: = worksforme * status: new = closed Comment: Here is the patch - for the unix(es) at least - I conceeded defeat in getting the windows compile enviroment working on my local machines. The windows version will not compile until the associated changes are made in windows branch of the scheduler. The upshot of this change is that time-of-day wrapround on the o/s will occur before the thread delay counter wraps. That's long enough for me. -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/1115 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler___ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
Re: [GHC] #1115: GHC concurrency runtime breaks every 497 (and a bit) days
#1115: GHC concurrency runtime breaks every 497 (and a bit) days +--- Reporter: Neil Davies | Owner: Neil Davies Type: bug | Status: new Priority: normal | Milestone: 6.6.1 Component: Runtime System |Version: 6.6 Severity: major | Resolution: Keywords: | Difficulty: Moderate (1 day) Testcase: | Architecture: Unknown Os: Unknown | +--- Changes (by igloo): * milestone: = 6.6.1 * owner: = Neil Davies Comment: Neil's working on a patch for this. -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/1115 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler___ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
[GHC] #1115: GHC concurrency runtime breaks every 497 (and a bit) days
#1115: GHC concurrency runtime breaks every 497 (and a bit) days -+-- Reporter: Neil Davies | Owner: Type: bug | Status: new Priority: normal| Milestone: Component: Runtime System| Version: 6.6 Severity: major |Keywords: Difficulty: Moderate (1 day) |Testcase: Architecture: Unknown | Os: Unknown -+-- The GHC concurrency model does all of its time calculations for delays in ticks - a tick being fixed at 1/50th of a second. It performs all of these calculations in terms the number of these ticks since the Unix epoch (Jan 1970). Which is stored as an Int - unfortunately this (typically) 2^31 bits overflows every 497 (and a bit) days. When it does overflow any threads on the timer queue will either a) run immediately or b) not be run for another 497 days - depending on which way the sign changes. Also any timer calculation that spans the wrapround (sometime in the preceeding 35 or so minutes) will not be dealt with correctly. Although this doesn't happen often (the last one was around Sat Sep 30 18:32:51 UTC 2006 and the next one will not be until Sat Feb 9 21:00:44 UTC 2008) it nees to be resolved. Take a look at the definition of getTicksofDay (in base/include/HsBase.h (non-windows) / base/cbits/Win32Utils.c) and getDelay (in base/GHC/Conc.lhs) to understand the details of the issue. -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/1115 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler___ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
Re: [GHC] #1115: GHC concurrency runtime breaks every 497 (and a bit) days
#1115: GHC concurrency runtime breaks every 497 (and a bit) days +--- Reporter: Neil Davies | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Runtime System |Version: 6.6 Severity: major | Resolution: Keywords: | Difficulty: Moderate (1 day) Testcase: | Architecture: Unknown Os: Unknown | +--- Comment (by Neil Davies): I've got a patch for the (non-Windows) targets that I'm testing now. I may need some help for the windows version - at least at the level of a code walkthrough. -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/1115 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler___ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
