about last level cache on big little cpu

Does all the big.LITTLE cpu share the same llc? or it depends on different vendor's products?

Thanks
    Alex

No. I don't know of any big.LITTLE implementation that does have a shared last level cache. TC2 has per cluster L2 caches as last level caches, so no cache is shared between the big and little clusters.

Morten

It depends on implementation. e.g. on Cortex-A7 L2 is optional. So there can be big.LITTLE system with CA15(with L2) and CA7(without L2). In general depends are the choice of the processors in bL and if L2 is mandatory or optional on those processors.

Regards,
Sudeep