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Comment: Re:The article is bad - mfg technology dominates (Score 1) 155

by edxwelch (#47776087) Attached to: Research Shows RISC vs. CISC Doesn't Matter

From the origonal paper www.cs.wisc.edu/vertical/papers/2013/hpca13-isa-power-struggles.pdf (which ExtremeTech does not link to):

Technology scaling and projections:
Since the i7 processor is 32nm and the Cortex-A8 is 65nm, we use technology node characteristics from the 2007 ITRS tables to normalize to the 45nm technology node in two results where we factor out tech-
nology; we do not account for device type (LOP, HP, LSTP).
For our 45nm projections, the A8â(TM)s power is scaled by 0.8Ã-- and
the i7â(TM)s power by 1.3Ã--. In some results, we scale frequency
to 1 GHz, accounting for DVFS impact on voltage using the
mappings disclosed for Intel SCC [5]. When frequency scal-
ing, we assume that 20% of the i7â(TM)s power is static and does
not scale with frequency; all other cores are assumed to have
negligible static power. When frequency scaling, A8â(TM)s power is
scaled by 1.2Ã--, Atomâ(TM)s power by 0.8Ã--, and i7â(TM)s power by 0.6Ã--.
We acknowledge that this scaling introduces some error to our
technology-scaled power comparison, but feel it is a reasonable
strategy and doesnâ(TM)t affect our primary findings (see Table 4).

Comment: Re:OpenCL, HSA? (Score 1) 117

by edxwelch (#47586133) Attached to: AMD Launches New Higher-End Kaveri APUs A10-7800 and A6-7400K

There are no HSA applications (just a few tech demos) and it doesn't look like they are going to appear any time soon.
HSA will only work on kaveri CPUs, which are maybe 0.001% of the market. Maybe if Intel adoped HSA then there would be some more motivation for developers to support it.

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