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In this paper, a vCPU (virtual CPU) migration mechanism in order to improve real-time responsiveness in a GPOS (General Purpose Operating System) is presented in the embedded multicore virtualization platform and can also be applied to CPS environment. Virtualization technique is recently emerging as a useful solution for the embedded system, because it can provide real-time handling ability through...
In this paper, a vCPU (virtual CPU) migration mechanism in order to improve real-time responsiveness in a GPOS (General Purpose Operating System) is presented in the embedded multicore virtualization platform and can also be applied to CPS environment.
When a real-time OS (RTOS) and a symmetric multiprocessing general purpose OS (SMP GPOS) are executed on the same multicore processor, there is a possibility to cause the lock holder preemption (LHP) problem, which is a well known problem of the sources of the performance degradation on an SMP GPOS. The problem occurs when a kernel mode thread holding a lock in a SMP GPOS is preempted by other OSes...
In this paper, we introduce a lightweight processor abstraction layer named SPUMONE. SPUMONE provides virtual CPUs for respective guest OSes, and schedules them according to their priorities. In a typical case, SPUMONE schedules Linux with a low priority and an RTOS with a high priority. We first discuss why the traditional virtual machine monitor design is not appropriate for embedded systems, and...
Memory de-duplication removes the memory state redundancy among virtual machines that run on the same physical machine by identifying common memory pages shared by these virtual machines and storing only one copy for each of common memory pages. A standard approach to identifying common memory pages is to hash the content of each memory page, and compare the resulting hash values. In a virtualized...
In this paper, we propose a virtualization architecture for the multi-core embedded system to provide more sys-tem reliability and security while maintaining the same performance without introducing additional special hardware supports or having to implement complex protection mechanism in the virtualization layer. Embedded virtualization design usually uses two kinds of approaches, traditional VMM...
In this paper, we propose a virtualization architecture for the multi-core embedded system to provide more system reliability and security while maintaining the same performance without introducing additional special hardware supports or having to implement complex protection mechanism in the virtualization layer. Virtualization has been widely used in embedded systems, especially in consumer electronics,...
Multi-core processors are being increasingly adopted for embedded systems because they improve performance, power consumption and lower development cost. Composing multiple operating systems on a multi-core processor enhances the reusability of software when developing rich functional embedded systems. Multiple OS environments enable the product to use two versions of an operating system at the same...
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