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

[Lennart Augustsson]

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
>
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