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TitleBringing Hardware Multithreading to the Real-Time Domain
Author(s)Gomes, Tiago
Garcia, Paulo
Pinto, Sandro
Monteiro, João L.
Tavares, Adriano
field-programmable gate array (FPGA)
hardware offloading
real-time OS
Issue date2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
JournalIEEE Embedded Systems Letters
Abstract(s)The emergence of hardware multithread (HW-MT) architectures increased the performance of MT applications. However, traditional HW-MT architectures are not suitable to real-time operating systems as their performance-oriented scheduling algorithm may conflict with RTOS software scheduling. This letter presents RT-SHADOWS, a portable architecture which provides a unified hardware-software scheduling, bringing the benefits of HW-MT to the RTOS domain. We show that tightly-coupled real-time compliant hardware integration achieves throughput benefits, maintaining the RTOS scheduling policy intact while increasing the predictability of RTOSes. Our solution shows on average, speed-ups between 3 and 4 times over the native versions with very low area usage/performance overhead ratio, due to its minimal cost (2% of extra slices per hardware-supported thread). This work surpasses related work by providing a complete and agnostic hardware solution which is independent of any specific RTOS.
AccessRestricted access (UMinho)
Appears in Collections:CAlg - Artigos em revistas internacionais/Papers in international journals

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