Interrupt Scheduler REMON for Embedded Systems

Nankaku, Shigeki; Mizushino, Kiminori; Koizumi, Hiroyuki; Fukuda, Akira

doi:10.1541/ieejeiss.133.316

Cited by 3 publications

(3 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The purpose of the proposed method is to implement SOF detection in embedded systems, which was previously impossible without RTOS and MMU, by using the REMON function to create independent execution environments on the ISR level . In addition, the method provides automatic stack reallocation and faster ISR troubleshooting in case of SOF, which is expected to reduce the number of faults leading to SOF, thus improving the reliability of embedded systems.…”

Section: Detection Of Isr Sof and Stack Reallocationmentioning

confidence: 99%

“…REMON provides individual ISRs with execution environments including stacks. Every time an interrupt occurs, the REMON scheduler rearranges the ISR execution environments including stacks, and switches the ISR .…”

Section: Detection Of Isr Sof and Stack Reallocationmentioning

confidence: 99%

“…For the purpose of improving the real‐time performance of non‐RTOS embedded systems, we have studied REMON (real‐time embedded monitor) . In REMON, as in RTOS, semaphore functions are provided for ISRs in order to implement exclusive control among ISRs.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Dynamic Control Mechanism of Interrupt Stack Overflow on Real‐Time Embedded Monitor (REMON)

Nankaku

Kawakami

Koizumi

et al. 2015

Elect Comm in Japan

Self Cite

View full text Add to dashboard Cite

SUMMARYFor embedded systems, it is important to detect changes in the real world and continuing processing properly. The changes are represented by external interrupts, and proper processes are implemented by nested interrupt service routines (hereafter ISRs). Here, a necessity of mutual exclusion arises. In a software execution environment without any real time OS (hereafter RTOS), a traditional mutual exclusion approach was to disable/enable interrupts in a CPU-specific manner. However, this method typically degrades the real time performance because it defers execution of the mutual-exclusion-free part of the system. Considering this situation, we have been studying a realtime embedded monitor (REMON) which provides a novel mutual exclusion method that can maintain real-time performance without RTOS. For in-service embedded systems, one major runtime fault is ISR stack overflow (SOF). It is extremely difficult to test all conditions where ISRs are called from various external conditions. Note that the ISR stack holds not only data but also program instruction addresses, and consequently a SOF may cause a fatal system error. In summary, ISR SOF is a significant issue, but it has not previously been addressed by REMON. This paper proposes two safety extension methods for embedded systems using REMON. The first method detects ISR overflow and safely stops the system before triggering a systemdown or a malfunction. The second method reallocates the ISR stack and resumes system execution automatically. C⃝ 2015 Wiley Periodicals, Inc. Electron Comm Jpn, 98(3): 57-69, 2015; Published online in Wiley Online Library (wileyonlinelibrary.com).

show abstract

Section: Detection Of Isr Sof and Stack Reallocationmentioning

confidence: 99%

Section: Detection Of Isr Sof and Stack Reallocationmentioning

confidence: 99%

See 1 more Smart Citation

A Dynamic Control Mechanism of Interrupt Stack Overflow on Real‐Time Embedded Monitor (REMON)

Nankaku

Kawakami

Koizumi

et al. 2015

Elect Comm in Japan

Self Cite

View full text Add to dashboard Cite

show abstract

An Dynamic Control Mechanism of Interrupt Stack Overflow on Real-time Embedded Monitor REMON

et al. 2013

Self Cite

View full text Add to dashboard Cite

For embedded systems, it is important to capture changes in real world and process properly. The changes are represented by external interrupts, and proper processes are implemented by nested interrupt service routines (hereafter ISRs). Here a necessity of mutual exclusion arises. In a software execution environment without any Real Time OS (hereafter RTOS), a traditional mutual exclusion approach was to disable/enable interrupts in a CPU specific manner. However this method typically degrades the real time performance because it defers execution of mutual-exclusion-free part of the system. Considering this situation, we have been studying a Real-Time Embedded Monitor (REMON) which provides a novel mutual exclusion method that can maintain real-time performance without RTOS. For in-service embedded systems, one major runtime fault is ISR stack overflow.It is extremely difficult to test every conditions where ISRs are called from various external conditions. Note that ISR stack holds not only data but also program instruction addresses, consequently a stack overflow may cause a fatal system error. In summary, ISR stack overflow is a significant issue, but it was not addressed by REMON until now. This paper proposes two safety extension methods for embedded systems using REMON. The first method detects ISR overflow and safely stops the system before triggering a system-down or a misbehavior. The second method reallocates ISR stack and resumes the system execution automatically.

show abstract