Re: Garbage Collector Problem

Hi Marco,

A few suggestions:

1- man sablevm [yes, sablevm comes with a man page;-)]

   You'll discover many system properties that can be specified on the
   command-line to control GC options.  e.g.:

   sablevm --property="sablevm.heap.size.increment=1048576"

2- sablevm --verbose-gc

3- You can also look (and possibly add printf()'s) at SableVM's memory
   allocation code in src/libsablevm/gc_copying.c

  The most interesting function, for you, is probably:

   _svmf_copy_gc_internal (_svmt_JNIEnv *env, size_t requested_size)

  In particular, look at the statements that contain calls to
  _svmf_malloc() and _svmf_free().

Given the calls to _svmf_free(), the behavior that you observe is
surprising.

We would be very thankful to you if you investigated the matter and
reported back to us.

Have fun!

Etienne

Marco Rotellini wrote:
> running the same app on my linux/arm9 system with sablevm causes the app
> to crash after a while saying "out of memory". i enforce the gc to do
> its work by periodically call System.gc(). when doing this, the problem
> seems to be solved (at least after a 24h test run) -> the free memory on
> the system remains more or less the same. but it's not satisfying.
> so my question is: why does sablevm's gc not recognize the fatal out of
> memory situation, when the free memory drifts to 0?
> are there any options to set when starting the vm to affect the gc's
> behaviour?

-- 
Etienne M. Gagnon, Ph.D.            http://www.info2.uqam.ca/~egagnon/
SableVM:                                       http://www.sablevm.org/
SableCC:                                       http://www.sablecc.org/

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