|Subject:||Re: [Chicken-users] Memory allocation and limits in chicken scheme programs|
|Date:||Wed, 13 Dec 2017 17:16:52 -0700|
On Wed, Dec 13, 2017 at 11:13:54AM -0700, Matt Welland wrote:
> I'm using Chicken 4.10.0 and with the below script chicken rapidly
> allocates memory then seems to get stuck:
Try to update to CHICKEN 4.13.0 first (standard advice, we usually
fix lots of issues in new versions). I simply get this after a few
[panic] out of memory - heap has reached its maximum size - execution terminated
The fix is to increase the maximum allowed heap size using -:hm:
csi -:hm4G ./test.scm cleanly exits after a few seconds here with either
version of CHICKEN.
> The program chokes after 133 rounds through the loop. No "out of memory'
I suppose that's a bug we fixed in 4.13.0; I seem to recall an issue like
that where allocating near the maximum heap size would result in it
triggering a GC, then filling up the heap immediately again etc, resulting
in a GC loop, but I can't find it in NEWS right now.
> The process memory usage doesn't seem to grow and the program just
> hangs. I added -B: but didn't get any output.
Try the -:g option (debugging output for the GC); you'll quickly see that
it's resizing the heap all the time to the same limit.
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