Multi-objective power management for CMPs in the dark silicon age

QC 20170920
New power management challenges in networked many-core systems arise when limitations of the dark silicon era come into reality. The main goal in the power management process is to achieve optimal power-performance efficiency considering thermal design power (TDP) budget. This necessitates: (1) monitoring several system characteristics including both communication and computation aspects, (2) categorizing, prioritizing, and processing the information in an intelligent way, and (3) controlling a rich set of actuators. More precisely, a comprehensive Observe-Decide-Act (ODA) loop based multi-objective control approach is needed, which has access to a rich set of sensors and actuators. In this chapter, we first identify a necessary set of system parameters for monitoring such as an upper limit on total power consumption, dynamic behavior of workloads, utilization of processing elements, per-core power consumption, load on network-on-chip (NoC), etc. We also discuss essential actuators needed for the power management process together with a multi-objective and dark silicon aware power management policy that is able to simultaneously consider all the mentioned parameters. As actuator, fine-grained voltage and frequency scaling is utilized, including near-threshold operation, per-core power gating, as well as scheduler-level actuation to maximize the system throughput while honoring the power budget.

Haghbayan, M. -H (författare)
Liljeberg, P. (författare)
Jantsch, A. (författare)
Tenhunen, HannuKTH,Integrerade komponenter och kretsar(Swepub:kth)u1wjjaxp (författare)
KTHIntegrerade komponenter och kretsar (creator_code:org_t)

Ingår i:The Dark Side of SiliconCham : Springer, s. 191-21697833193159669783319315942

Av författaren/redakt...: Rahmani, A. M.; Haghbayan, M. -H; Liljeberg, P.; Jantsch, A.; Tenhunen, Hannu

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