Re: [PATCH v3 6/6] sched: powerpc: Add SD_SHARE_POWERDOMAIN for SMT level

2014-03-24 Thread Vincent Guittot
On 23 March 2014 02:49, Preeti U Murthy wrote: > Hi Vincent, > > On 03/19/2014 09:52 PM, Vincent Guittot wrote: >> Set the power domain dependency at SMT level of Power8 but keep the flag >> clear at CPU level. The goal is to consolidate tasks on the threads of a >> core up to a level as explained

Re: [PATCH v3 6/6] sched: powerpc: Add SD_SHARE_POWERDOMAIN for SMT level

2014-03-22 Thread Benjamin Herrenschmidt
On Sun, 2014-03-23 at 07:19 +0530, Preeti U Murthy wrote: > We were discussing the impact of this consolidation and we are not too > sure if it will yield us good power efficiency. So we would want to > experiment with the power aware scheduler to find the "sweet spot" for > the number of threads t

Re: [PATCH v3 6/6] sched: powerpc: Add SD_SHARE_POWERDOMAIN for SMT level

2014-03-22 Thread Preeti U Murthy
Hi Vincent, On 03/19/2014 09:52 PM, Vincent Guittot wrote: > Set the power domain dependency at SMT level of Power8 but keep the flag > clear at CPU level. The goal is to consolidate tasks on the threads of a > core up to a level as explained by Preeti: > "On powerpc we would want to clear the SD_