[GHC] #840: GHC on "loosing" its handles takes 100% CPU

[Simon Peyton-Jones]

I'm not doubting that it's genuine -- but can anyone make a reproducible
test case?

Simon

| -----Original Message-----
| From: glasgow-haskell-bugs-bounces at haskell.org
[mailto:glasgow-haskell-bugs-
| bounces at haskell.org] On Behalf Of Lennart Augustsson
| Sent: 04 August 2006 13:47
| To: Bulat Ziganshin
| Cc: GHC; glasgow-haskell-bugs at haskell.org
| Subject: Re: [GHC] #840: GHC on "loosing" its handles takes 100% CPU
| 
| It happens all the time to me that GHC doesn't die properly on
windows.
| Every so often I have to kill a few straggling ghc processes.  They
| all spin consuming 100% CPU when this happens.
| 
| 	-- Lennart
| 
| On Aug 2, 2006, at 10:09 , Bulat Ziganshin wrote:
| 
| > Hello GHC,
| >
| > Wednesday, August 2, 2006, 4:33:09 PM, you wrote:
| >
| >> #840: GHC on "loosing" its handles takes 100% CPU
| >
| >>  import System.Process
| >>  main = runInteractiveCommand "ghc"
| >
| >>  When run terminates immediately, as expected, but leaves an
instance
| >>  of ghc running. The ghc process takes up 100% of the CPU time, and
| >>  seemingly does nothing.
| >
| > well, i have similar problem: there are only 256 megs on my machine
| > and sometimes when ghc compilation uses more than 200 megs and
starts
| > trashing memory, i tries to stop it by hitting Ctrl-C. in this
| > situation it's rather typical that i got back my console (and rerun
| > ghc) but old GHC process don't killed and continue to compile
program.
| > i can investigate it further but don't know what to do. at least it
| > seems that memory trashing is required to uncover this problem. i
also
| > should note that i run "ghc --make" from the .cmd file so there is a
| > whole stack of processes runned. may be i just kill higher-level ghc
| > (or even cmd) and lower-level ghc still continue to do it's job? i'm
| > not sure..
| >
| > --
| > Best regards,
| >  Bulat                            mailto:Bulat.Ziganshin at gmail.com
| >
| > _______________________________________________
| > Glasgow-haskell-bugs mailing list
| > Glasgow-haskell-bugs at haskell.org
| > http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
| 
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