[Haskell-cafe] Possible GC bug

Don Stewart dons at galois.com
Fri Jan 9 17:21:58 EST 2009


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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