On 15/07/2010 00:26, John Meacham wrote:
On Wed, Jul 14, 2010 at 10:35:50AM +0100, Simon Marlow wrote:
http://portal.acm.org/citation.cfm?id=773044
Ah, this paper looks very interesting, I was wondering if you had
experimented with prefetching just ahead of the allocation pointer.
Looks like it helped :)
It helped back then, but had to be finely tuned for each CPU. I think
automatic prefetching these days gets most of the benefit without any of
the tuning or portability issues. I experimented with other kinds of
prefetching in the GC, but failed to find anything that worked reliably
enough.
Cheers,
Simon
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