The software prefetch policy controls the handling standard Alpha
software prefetch instructions. I'd suggest looking at the Alpha
reference manual if you're not familiar with these. These instructions
are typically inserted by the compiler.
Alpha defines prefetch instructions only for the data cache. There was
a former student here at Michigan (Dave Greene) who did some work on
software prefetch instructions for the instruction cache, for which he
added some support for that to m5, but that's not standard Alpha and we
don't support it any more.
Steve
Magic Zheng wrote:
Hi all,
I have a doubt on SoftwarePrefetchPolicy.
For the Full CPU, there is parameter of sw_prefetch_policy.
It looks like issue the prefetch by CPU itself, not the prefetch
mechanism of cache.
My questions here are:
(1) This SoftwarePre fetch by CPU only prefetch data cache when miss, or
do it on instruction cache too?
(Right now I can only find the relative data prefetch code. My
understanding is wrong?)
(2) Could you recommend the reference paper for this SoftwarePrefetch?
I hope I can clarify the intention of this technique and my doubt by the
recommended reference paper.
Thanks a lot!
Magic
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