topic Corenet fabric speed in P-Series

Corenet fabric speed

Simbu — Thu, 22 Aug 2013 16:22:30 GMT

Hi All,

In past, I think the FSB (Front Side Bus/Bus Speed) for any processor is computed against half the clock rate, so for e.g. 1.8 GHz processor with dual 32 Bit bus , both clocked at 450 Mhz. If I use the same concept here(p4080 -1.5 Ghz) in case of fabric and assume the fabric is accelerated @ ~750 Mhz .

Is this assumption right? It would be great, if someone can clarify how can we correlate the bus speed against fabric speed?

Any specific document or reference link will also be helpful..

Thanks in Advance.

Re: Corenet fabric speed

Simbu — Fri, 23 Aug 2013 05:54:29 GMT

I found the below statement from P4080 product description link

Power management is always a major design consideration in embedded applications, and for this reason,

the P4080 is designed to dissipate <30 W Max with all 8 CPUs and platform logic running at maximum

frequency (8x 1.5 GHz CPUs, 800 MHz CoreNet).

Does this mean that the corenet speed as such one and can't be described against single core like speed/core ??

Thanks in Advance.

Re: Corenet fabric speed

Simbu — Tue, 27 Aug 2013 06:59:56 GMT

Thanks.. I got the answer from U boot log and from the uboot code freqSystemBus.