Identified a complex rare bug that occurs only once every several hundred to several thousand times. Debugged seamlessly from the OS kernel layer to the application layer.
At Alive Vision Software, we accept commissioned work for systems without specifications and for the investigation and analysis of bugs in **"embedded systems and real-time operating systems (RTOS)"** that occur infrequently and are extremely difficult to identify the cause. In this achievement, we were officially commissioned by the OS vendor that develops and sells the μITRON 4.0 specification RTOS "PrKernel V4" to provide advanced technical support and bug investigation for end users. In a fiber optic fusion splicer, we addressed a severe phenomenon with low reproducibility, where "the sound occasionally does not occur after hundreds to thousands of operations (a bug in EDMA)," by utilizing log analysis and debugger backtrace to identify an unfreed sequence in the exclusive control (semaphore). We quickly implemented a solution through a provisional implementation. For high-difficulty debugging and technical support issues such as "unexplained freezes or bugs occurring just before mass production or after the product has been released to the market" and "being unable to grasp the causes of complex bugs involving the OS, drivers, and hardware," please leave it to us.
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basic information
[Specifications and Specs (Supported Areas and Achievements)] Supported OS: Various real-time operating systems such as PrKernelV4 (compliant with μITRON4.0) Development and Analysis Environment: eBinder, ARM architecture Specialized Areas: Identification of rare bugs with low reproducibility, investigation of DMA/peripheral control issues, deadlock/unreleased analysis of mutual exclusion (semaphore/mutex), bug visualization through log optimization Search Keywords: Real-time OS, RTOS, PrKernelV4, eBinder, ARM, EDMA, semaphore, mutual exclusion, issue investigation, technical support, debugging, outsourcing work
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Applications/Examples of results
【Applications and Achievements】 ■ Main Applications (Target Audience and Issue Resolution) Outsourced customer technical support and issue investigation for real-time OS (RTOS) vendors Analysis and countermeasures for unidentified troubles in RTOS environments such as PrKernelV4 (μITRON4.0) Debugging of severe issues with an extremely low reproduction frequency, occurring once every several hundred to several thousand times, which cannot be identified internally Identification of root causes and verification of modifications for "composite issues" involving the operation of EDMA and TI chips, as well as the specifications of RTOS components like semaphores ■ Example of Achievements Target Device: Optical Fiber Welding Machine
Company information
We specialize in contract development of embedded software utilizing RTOS, and we also offer custom software solutions using video over the Internet and ISDN lines.
![CAE Analysis Transient Response Analysis [Reproducing the actual operating conditions of the product!]](https://image.mono.ipros.com/public/product/image/bf0/2000226981/IPROS3228832664818860528.png?w=280&h=280)
