Experimental evaluation of the Linux RT Patch for real-time applications

Betz, Wolfgang; Cereia, Marco; Bertolotti, Ivan Cibrario

doi:10.1109/etfa.2009.5347056

Cited by 12 publications

(12 citation statements)

References 3 publications

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“…The other known real‐time analyses are micro‐benchmarks aimed at certifying that a hardware architecture satisfies the response‐time needs for a certain application. Tools like h a c k b e n c h and c y c l i c t e s t , part of the r t − t e s t tools suite, are often used for this purpose.…”

Section: Related Workmentioning

confidence: 99%

Runtime latency detection and analysis

2016

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Summary Detecting latency‐related problems in production environments is usually carried out at the application level with custom instrumentation. This is enough to detect high latencies in instrumented applications but does not provide all the information required to understand the source of the latency and is dependent on manually deployed instrumentation. The abnormal latencies usually start in the operating system kernel because of contention on physical resources or locks. Hence, finding the root cause of a latency may require a kernel trace. This trace can easily represent hundreds of thousands of events per second. In this paper, we propose and evaluate a methodology, efficient algorithms, and concurrent data structures to detect and analyze latency problems that occur at the kernel level. We introduce a new kernel‐based approach that enables developers and administrators to efficiently track latency problems in production and trigger actions when abnormal conditions are detected. The result of this study is a working scalable latency tracker and an efficient approach to perform stateful tracing in production. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Related Workmentioning

confidence: 99%

Runtime latency detection and analysis

2016

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“…The Figure 3 and Figure 4 show this test and prove that latency in RT-Linux is better than STD Linux. In paper [6] the authors present a test bed to evaluate the response of Linux OS RT-patched kernel version 2.6.25-4-rt4. It executes a synthetic real time application under a best effort background application with a single user.…”

Section: Related Workmentioning

confidence: 99%

“…The use of SoC with Linux brings some advantages that was sought on this work, like royalties free libraries and development tools, software packages and ease to deploy and maintain [6].…”

Section: Data Acquisition System Using Soc and Linuxmentioning

confidence: 99%

Experimental Analysis of the Linux RT-patched for Data Acquisition applied to Power Sector

Dias¹,

Souza²,

Noll³

2014

IJCA

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The use of SoCs allow a compact and low cost postprocessing system for monitoring electrical magnitudes. The main idea of this work is to have a small hardware which is deterministic enough to execute acquisition and sufficiently power to process data at a low cost.In this paper, it is presented two problem domains of electrical systems measurement, one with acquisition of 1 kHz and the other with 5 kHz. It was built an acquisition test bed with a SoC with standard and real-time Linux to compare and evaluate its timing constraints.

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“…In this paper, the goal is to reorder upon reception the serialized flow of heterogeneous data, privileging real time data [11], so that its performances can be independent from unprivileged traffic; this has been achieved by applying a few modifications to the Linux Kernel and taking advantage of them with tools provided in user-space. The tests, that work as proof-of-concept for the protocol functional aspects, performed in this paper are much more weighty in bandwidth and timings than what work session truly shall demand: inter-departure time is always set to 10ms, while actually present-day agricultural machinery movement dynamics allows about ten times slower flows; for what concerns bandwidth usage, real work sessions will involve from two to six machines and its implements, a number paired in the test rig, that handle few real time data flows, the test count up to thirty.…”

Section: Introductionmentioning

confidence: 99%

Improvements of determinism in WI-FI real-time protocol for agricultural machine clusters

Ruggeri

Malaguti

Martelli

2012

2012 IEEE International Symposium on Industrial Electronics

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Fully automated agricultural field treatments and Precise Farming are coming in shortly; yet increasing production needs demand a more efficient, planned and harmonized interaction between the machinery clusters involved in the work session. Soon a strong, effective and integrated standardization will be more than needed. This is the path the ISO standardization working group ISO TC-127/SC19/WG5 has taken. The paper describes the further enhancements done from previous works [1,2]. Particularly, we focused on stabilizing performances of high priority communications at the expense of best-effort, low urgency traffic. Performances are explained as [2]. The main improvements concern some kernel modifications, especially about the networking management. The results will show significant steps forward towards a quasi-isochronous transport protocol that manages high priority flows ensuring a high level of determinism and throughput.

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Experimental evaluation of the Linux RT Patch for real-time applications

Cited by 12 publications

References 3 publications

Runtime latency detection and analysis

Runtime latency detection and analysis

Experimental Analysis of the Linux RT-patched for Data Acquisition applied to Power Sector

Improvements of determinism in WI-FI real-time protocol for agricultural machine clusters

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