On Wed, Aug 30, 2023 at 05:56:14PM +0530, Srikar Dronamraju wrote:
Currently there are four powerpc specific sched topologies. These are
all statically defined. However not all these topologies are used by
all powerpc systems.
To avoid unnecessary degenerations by the scheduler , masks and flags
are compared. However if the sched topologies are build dynamically then
the code is simpler and there are greater chances of avoiding
degenerations.
Even x86 builds its sched topologies dynamically and new changes are
very similar to the way x86 is building its topologies.
You're not stating it explicitly, but you're doing this as a performance
optimization, right? The x86 thing didn't particularly care about
avoiding degenerate topologies -- it's just that the fixed tables method
grew unwieldy due to combinatorics.
And how does this patch relate to the other series touching this?
powerpc/smp: Shared processor sched optimizations