Messages in this thread | | | Subject | Largest mallocs opteron vs. 32bit systems | From | Soeren Sonnenburg <> | Date | Tue, 27 Apr 2004 08:24:24 +0200 |
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Hello...
I just did some tests trying to malloc() memory on an opteron and a xeon system...
I wonder why I see regression for the opteron in 32bit mode. Comments welcome (workarounds even more). Anyhow my observations:
malloc large block:
opteron -> up to 7G (64bit exe) -> up to 1500M (32bit exe) xeon -> up to 2000M
malloc a couple of blocks of size 100M:
whole process (100 M steps) opteron -> 7700M (64bit exe) -> up to 2200 (32bit exe) xeon -> 2700M
So one 'looses' 500M.
Feedback welcome, Soeren
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