Messages in this thread | | | Date | Tue, 07 Jan 2014 16:09:39 +0530 | From | Preeti U Murthy <> | Subject | Re: [RFC] sched: CPU topology try |
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On 01/07/2014 03:20 PM, Peter Zijlstra wrote: > On Tue, Jan 07, 2014 at 03:10:21PM +0530, Preeti U Murthy wrote: >> What if we want to add arch specific flags to the NUMA domain? Currently >> with Peter's patch:https://lkml.org/lkml/2013/11/5/239 and this patch, >> the arch can modify the sd flags of the topology levels till just before >> the NUMA domain. In sd_init_numa(), the flags for the NUMA domain get >> initialized. We need to perhaps call into arch here to probe for >> additional flags? > > What are you thinking of? I was hoping all NUMA details were captured in > the distance table. > > Its far easier to talk of specifics in this case. > If the processor can be core gated, then there is very little power savings that we could yield from consolidating all the load onto a single node in a NUMA domain. 6 cores on one node or 3 cores each on two nodes, the power is drawn by 6 cores in all. So I was thinking under this circumstance we might want to set the SD_SHARE_POWERDOMAIN flag at the NUMA domain and spread the load if it favours the workload.
Regards Preeti U Murthy
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