[Haskell-cafe] Possible GC bug

[Anish Muttreja]

Thanks, I have reported a bug.I hope the stack trace is useful.

Cheers,
Anish

On Fri, Jan 09, 2009 at 02:21:58PM -0800, Don Stewart wrote:
> Report it as a GHC bug to the GHC team, here:
> 
>     http://hackage.haskell.org/trac/ghc/newticket?type=bug
> 
> if you believe it is a bug.
> 
> Cheers,
>   Don
> 
> 
> anishmuttreja:
> >    Hi,
> >    I have a program  that seems to run into occasional garbage
> >    collection-related core dumps. The problem typically only occurs after the
> >    program has been running for a while and is consuming a large amount of
> >    memory (5 - 16GB). The large memory consumption is expected because the
> >    program analyzes very large traces from verilog simulation and needs to
> >    maintain IntMaps with hundreds of thousands of entries.
> > 
> >    Is this a bug that I should report?I am afraid that my employer will not
> >    allow me to share my source code.  I do have a stack trace, below.
> >    This was obtained using ghc 6.10.1, RTS -N2  on an RHEL 4 machine.
> > 
> >    Is there something I can do trace the problem or avoid it?
> > 
> >    Thanks.
> >    PS: This is my first Haskell program and one of the most complicated I
> >    ever wrote, in any language. Using Haskell has been (mostly :-)) a joy.
> > 
> >    (gdb) where  
> >    #0  0x0000000000612f40 in slowIsHeapAlloced ()
> >    #1  0x000000000060f868 in evacuate ()
> >    #2  0x0000000000618d12 in scavenge_block ()
> >    #3  0x0000000000617c8d in scavenge_loop ()
> >    #4  0x0000000000610b25 in scavenge_until_all_done ()
> >    #5  0x0000000000610d02 in gc_thread_entry ()
> >    #6  0x000000000064859d in start_thread (arg=<value optimized out>)
> >        at pthread_create.c:297
> >    #7  0x000000000069e739 in clone ()
> >    #8  0x0000000000000000 in ?? ()
> > 
> >    --
> >    As an adolescent I aspired to lasting fame, I craved factual certainty,
> >    and I thirsted for a meaningful vision of human life - so I became a
> >    scientist. This is like becoming an archbishop so you can meet girls.
> >    -Matt Cartmill, anthropology professor and author (1943- )
> 
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