Is four the maximum number of big cores in a Dynamiq cluster? why is it? memory bandwidth? or soc routing concerns?
Is one big cluster (4 big + 4 little) feasible in terms of routing? Is it preferable to have more smaller CPU clusters?
For a cluster with only 4 little cores, do you suggest to remove the shared L3 cache from the cluster?
Yes, single DSU cluster supports up to 4 big cores, or up to 8 LITTLE cores. There are the max 8 cores in DSU cluster in total.
L3 cache is optional so that for 4 LITTLE cores, it's up to the designers to decide to keep or remove it.