* Ingo Molnar <mingo@xxxxxxx> [2009-02-23 12:07:25]: > > * Vaidyanathan Srinivasan <svaidy@xxxxxxxxxxxxxxxxxx> wrote: > > > My understanding is that we will certainly have a sysfs > > tunable to 'enable' timer migration or consolidation, similar > > to the sched_mc=2 policy, but the actual set of CPUs to > > evacuate and the correct set of target CPUs to consolidate > > should come from the scheduler and not necessarily from the > > user space. > > Yes. > > > The scheduler should be able to figure out the following > > parameters: > > > > * Identify set of idle CPUs (CPU package) from which timers > > can be removed > > * Identify a semi-idle or idle CPU package to which the timers > > can be moved > > * Decide when to start moving timers as the system has large > > number of idle CPUs > > * Decide when to stop migrating as system becomes less idle > > and utilisation increases > > > > Guiding all of the above decisions from user space may not be > > fast enough. > > Exactly. > OK, lets head that way for now. I've highlighted my concerns in a different email. Experimentation will definitely show us if they are justified or not. -- Balbir _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
