Date: | Tue, 29 Jun 2010 07:36:07 -0700 (PDT) |
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From: | Muhammad abid Mughal <mabidm_pieas@xxxxxxxxx> |
Subject: | Re: [Gems-users] prefetch in opal |
hi, Opal implements both hardware(ie next line prefetcher for instruction cache) and software prefetch(prefetch_inst_t).But in ruby you can not differentiate b/w theses two because both prefetches use "PrefetchBit_Yes" when issued to ruby [ see OpalInterface::makePrefetch(....).] But its easy to differentiate b/w these two. Regards, Muhammad abid From: Jerry Lin <cosjerry@xxxxxxxxx> To: Gems Users <gems-users@xxxxxxxxxxx> Sent: Tuesday, June 29, 2010 19:31:40 Subject: [Gems-users] prefetch in opal Hello all,
I'm wondering about what kind of prefetching that opal implemented. I saw Next Line prefetch in opal/system/rubycache.C.
But in ruby's dump file, the prefetch count seems to be the software prefetch.
Is the prefetching policy implemented in opal a HW prefetch or SW prefetch?
Any advice would be appreciated.
Thanks for helping. |
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