@conference {28143, title = {Duetto: Latency Guarantees at Minimal Performance Cost}, booktitle = {IEEE Design, Automation and Test in Europe Conference}, year = {2021}, pages = {1136-1141}, publisher = {IEEE}, organization = {IEEE}, address = {Grenoble, France}, abstract = {The management of shared hardware resources in multi-core platforms has been characterized by a fundamental trade-off:\ 
high-performance arbiters typically employed in COTS systems offer no worst-case guarantees,
while dedicated real-time controllers provide timing guarantees at the cost of significantly degrading system performance.\ 
In this paper, we overcome this trade-off by introducing Duetto, a novel hardware resource management paradigm.\ 
Duetto\ pairs a real-time arbiter with a high-performance arbiter and a latency estimator module.
Based on the observation that the resource is rarely overloaded, Duetto executes the high-performance arbiter most of the time, switching to the real-time arbiter only in the rare cases when the latency estimator deems that timing guarantees risk being violated.\ 
We demonstrate our approach on the case study of a multi-bank memory.
Our evaluation based on cycle-accurate simulations shows that\ Duetto can provide the same latency guarantees as the real-time arbiter with limited loss of performance compared to the high-performance arbiter.}, author = {Reza Mirosanlou and Mohamed Hassan and Rodolfo Pellizzoni} }