Is there any possibility to create a custom CPU model for KVM Linux guests, or at least to modify parameters such as cache size and model name?
I know I can set CPU features, topology and pinning and choose from one of available models. The problem is that there are Intel Xeon X7560 CPUs with 24 MiB of cache each, and I couldn't find anything even quite similar.
I'm not sure whether it can have a huge impact on computation speed with LAPACK, ATLAS, etc. but users will probably expect to see CPUs identical to these on the host machine.