Re: [RFC PATCH 0/8][Sorted-buddy] mm: Linux VM Infrastructure to s ...
Vaidyanathan Srinivasan writes: (Summary) This optimization can be actually be delayed in the free fast path and completely avoided if our memory is full and we are doing direct reclaim during...
View ArticleRe: [RFC PATCH 4/5] cpuidle/ppc: CPU goes tickless if there are no ...
Vaidyanathan Srinivasan writes: (Summary) The cost of keeping the periodic tick ON on the broadcast CPU in minimal (but not zero) since we would not allow that CPU to enter any deep idle states even if...
View ArticleRe: [RFC PATCH 4/5] cpuidle/ppc: CPU goes tickless if there are no ...
Vaidyanathan Srinivasan writes: (Summary) We do pay a power penalty by waking up few jiffies earlier which we can mitigate by reevaluating the situation and queueing a fine grain timer to the right...
View Article[PATCH 0/3] sched: Fixes for task placement in SMT threads
Vaidyanathan Srinivasan writes: (Summary) Hi, The following series fixes scheduler loadbalancing issues where we are missing opportunity to place tasks in SMT threads optimally especially on a POWER7...
View Article[PATCH 1/3] sched: Fix nohz_kick_needed to consider the nr_busy of ...
Vaidyanathan Srinivasan writes: (Summary) With the current implementation of nohz_kick_needed(), at this domain(sd), the nr_busy will be 1 always since it returns this parameter for sd->groups which...
View Article[PATCH 2/3] sched: Fix asymmetric scheduling for POWER7
Vaidyanathan Srinivasan writes: (Summary) The goal for the load balancer is to move tasks to lower order idle SMT threads within a core on a POWER7 system. In nohz_kick_needed(), we intend to check if...
View Article[PATCH 3/3] sched: Aggressive balance in domains whose groups shar ...
Vaidyanathan Srinivasan writes: (Summary) If the load cannot be moved from the busiest cpu to dst_cpu due to either tsk_cpus_allowed mask or cache hot tasks, then the dst_cpu is changed to be another...
View ArticleRe: [PATCH] cpuidle: powernv/pseries: Decrease the snooze residency
Vaidyanathan Srinivasan writes: (Summary) So the policy in shared lpar case is to let PowerVM hypervisor know immediately that the guest cpu is idle which will allow the hypervisor to use the cycles...
View ArticleRe: [PATCH] cpuidle: powernv/pseries: Decrease the snooze residency
Vaidyanathan Srinivasan writes: (Summary) But in single threaded guest, this can force an unnecessary exit/context switch overhead. Now that we have fixed the snooze loop to be bounded and exit...
View ArticleRe: [patch 10/15] sched/migration: Move calc_load_migrate() into C ...
Vaidyanathan Srinivasan writes: (Summary) [2016-07-12 18:33:56]: [...] Hi Thomas, Yes this patch fixes the issue. I was able to recreate the problem and also verify with this patch on 4.7.0-rc7.[...]...
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