[Beowulf] 8GB memeory limit?
hahn at mcmaster.ca
Wed Jul 11 08:37:34 EDT 2007
>> try -mcmodel=medium.
> ... which doesn't affect malloc() at all. It only affects static data.
oops, duh! failure of attention.
I'd have to guess the issue is a ulimit. malloc is mapped (for large
allocations) to an anonymous mmap normally. it might be interesting to
strace the config that fails, to verify this. there's also the kernel's
overcommit setting (/proc/sys/vm/overcommit_*) which could cause this effect.
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