[PATCH v5 0/5] powerpc/smp: Topology and shared processor optimizations

Michael Ellerman patch-notifications at ellerman.id.au
Thu Dec 21 21:38:20 AEDT 2023

On Thu, 14 Dec 2023 23:37:10 +0530, Srikar Dronamraju wrote:
> PowerVM systems configured in shared processors mode have some unique
> challenges. Some device-tree properties will be missing on a shared
> processor. Hence some sched domains may not make sense for shared processor
> systems.
> Most shared processor systems are over-provisioned. Underlying PowerVM
> Hypervisor would schedule at a Big Core granularity. The most recent power
> processors support two almost independent cores. In a lightly loaded
> condition, it helps the overall system performance if we pack to lesser
> number of Big Cores.
> [...]

Applied to powerpc/next.

[1/5] powerpc/smp: Enable Asym packing for cores on shared processor
[2/5] powerpc/smp: Disable MC domain for shared processor
[3/5] powerpc/smp: Add __ro_after_init attribute
[4/5] powerpc/smp: Avoid asym packing within thread_group of a core
[5/5] powerpc/smp: Dynamically build Powerpc topology


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