Re: [Haskell-cafe] GHC 7.0.1 developer challenges

Hi John, Why don't you use ulimit for this job? $ ulimit -m 32M; ./cpsa Regards, Mathieu On Fri, Dec 10, 2010 at 12:51 PM, John D. Ramsdell wrote:

Please excuse the grammar errors in my last post.  I was very tired. The name of the package that supplies the free function on Linux is procps, not procpc.  It's hosted on SourceForge.  To compile my program, do the following:

$ mv memfree.txt memfree.l $ make LDLIBS=-ll memfree

John

On Thu, Dec 9, 2010 at 11:36 PM, John D. Ramsdell wrote:

...

I found out how to compute a good memory limit for the GHC runtime on Linux systems.  One opens /proc/meminfo, and sums the free memory with the reclaimable memory.  The memory allocated to file buffers and the disk cache are reclaimable, and can be added to the memory of a growing GHC process.  Once you get beyond that memory size, thrashing is in your futures.

I have enclosed a short lex program that computes the limit.  It's basically what is done by the procpc program called free, except that I printed only the number of interest to a GHC runtime.

John

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