On Wed, May 15, 2019 at 07:23:20PM +0530, Parth Shah wrote: > The task packing on a core needs to be bounded based on its capacity. This > patch defines a new method which acts as a tipping point for task packing. > > The Core capacity is the method which limits task packing above certain > point. In general, the capacity of a core is defined to be the aggregated > sum of all the CPUs in the Core. > > Some architectures does not have core capacity linearly increasing with the > number of threads( or CPUs) in the core. For such cases, architecture > specific calculations needs to be done to find core capacity. > > The `arch_scale_core_capacity` is currently tuned for `powerpc` arch by > scaling capacity w.r.t to the number of online SMT in the core. > > The patch provides default handler for other architecture by scaling core > capacity w.r.t. to the capacity of all the threads in the core. > > ToDo: SMT mode is calculated each time a jitter task wakes up leading to > redundant decision time which can be eliminated by keeping track of online > CPUs during hotplug task.
Urgh, we just got rid of capacity for SMT. Also I don't think the above clearly defines your metric.
