Review Request: Newer AMD Processor Prefetch Defaults
vladimir.kozlov at oracle.com
Thu Mar 17 13:32:37 PDT 2011
Thank you, Tom
I put your changes into queue to push into hotspot-comp/hotspot.
Deneau, Tom wrote:
> Vladimir --
> Yes, the hw prefetcher is more advanced. In the future we may find a sw
> prefetch strategy that adds something to the hw prefetcher but for now we
> do not have one and we wanted to make sure our current best default gets in
> for the April JDK7 hotspot snapshot freeze.
> On the topic of bug numbers, there will definitely be some other default
> flag changes (not related to prefetch). Our plan was to submit each one
> functional area separately.
> -- Tom
> -----Original Message-----
> From: Vladimir Kozlov [mailto:vladimir.kozlov at oracle.com]
> Sent: Wednesday, March 16, 2011 7:59 PM
> To: Deneau, Tom
> Cc: hotspot-compiler-dev at openjdk.java.net
> Subject: Re: Review Request: Newer AMD Processor Prefetch Defaults
> I created next bug and your changes looks good. So hw prefetches become smart
> enough to replace sw prefetch?
> 7028394: Newer AMD Processor Prefetch Defaults
> Deneau, Tom wrote:
>> Hi all,
>> Please review this patch which changes a flag default for some
>> newer AMD processors. The webrev is at
>> This new default has shown improvement across many workloads.
>> I do not have a bug id for this.
>> -- Tom Deneau, AMD
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