Hi experts!
As you know, power efficient arm like cortexA7, A53 has in-order pipleline.
However as far as I understanding, Barriers like dmb, dsb, isb are related with out-of-order memory access.
But barriers are even used in in-order cpus.
What is for?
Can…
Hi,
I am looking at Cortex-A7 TRM, In "Direct Access to Internal Memory"
we can see several information regarding a cache line. Those are:
1. Current data in cache
2. its 4-bit MOESI state,
3. Outer Memory Attribute
4. its tag
5. NS State.
However…
Cortex-A7 pipeline is non-symmetric, what does this attribute mean?
My understand is that cortex-A7 pipeline's five entries does not have the same two, in the contrary, the cortex-A15 have the two entries are the same.
Which is better of thees CPUs:
Cortex A53 octa core 1.5 ghz,
Cortex A7 Allwinner T8 Eight core 2.0 ghz,
Cortex A9 Quad-Core 1.8 ghz ?
What are the main/important features added/updated?
Thank you.
Performance (DMIPS/CoreMark/SpecInt, etc.), Power and Area comparison on an apple-to-apple basis? Thanks a lot!
