Martin Høyer Kristiansen (test@example.com) on 11/18/10 wrote:
---------------------------
>someone (someone@somewhere.com) on 11/17/10 wrote:
>---------------------------
>
>>The OOOE logic in the Pentium M consumes about 26%
>>of device power and twice as much power it uses actually
>>doing computation (i.e. integer and FP data paths). Going
>>wider issue and/or larger window burns disproportionally
>>more of the power budget.
>
>...And width of the registers. Intel switched back to read-after-schedule (used
>in P4) for Sandy Bridge because supporting fat result buses would burn much more power.

Read-after-schedule? What is that, a particular OoO trick?


>You can compare the 26% power to the power spent in the result forwarding network
>in IPF and L1 cache accesses. Without the fantastic D$, IPF performance would be
>a lot lower. For both architectures, power well spent, IMO.
>
>Cheers
>Martin