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real-time core for Linux(C) following the dual kernel approach, for
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applications with stringent latency requirements.
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* The current stable release is Xenomai **3.1.1**.
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* Work is ongoing towards release **3.2**, including Y2038 readiness
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and a transition to a modern interrupt pipeline implementation
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called https://evlproject.org/dovetail/[Dovetail] which substitutes
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for the I-pipe, in order to support kernel 5.10 and beyond.
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* The current stable release is Xenomai **3.2.1**.
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---
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We are also paving the way to Xenomai 4, which is going to be based on
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* **Git hosting**: https://xenomai.org/gitlab/xenomai[https://xenomai.org/gitlab/xenomai]
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* **Clone**: git://git.xenomai.org/xenomai.git
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* **Maintenance branch**: stable/v3.0.x
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* **Maintenance branches**: stable/v3.0.x, stable/v3.1.x, stable/v3.2.x
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* **Development branch**: master
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* **Stable release**: v3.1.2
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https://source.denx.de/Xenomai/xenomai/-/archive/v3.1.1/xenomai-v3.1.1.tar.bz2[[tarball]]
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https://source.denx.de/Xenomai/xenomai/-/commit/8b2052eaeaa4d458d3eb354a3548903a044d5b0d[[tag]]
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* **Stable release**: v3.2.1
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https://source.denx.de/Xenomai/xenomai/-/archive/v3.2.1/xenomai-v3.2.1.tar.bz2[[tarball]]
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https://source.denx.de/Xenomai/xenomai/-/commit/3a1516832215c2948f38a663bd4f25a7b4cef7ae[[tag]]
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* **Documentation**:
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https://xenomai.org/documentation/xenomai-3/html/xeno3prm/index.html[[HTML]]
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https://xenomai.org/documentation/xenomai-3/pdf/[[PDF]]
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## Interrupt pipeline (I-pipe)
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## Interrupt pipeline (Dovetail, I-pipe)
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The Cobalt real-time core depends on a patch to the mainline Linux
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kernel, which introduces a separate, high-priority execution stage for
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The Cobalt real-time core depends on patches to the mainline Linux
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kernel, which introduce a separate, high-priority execution stage for
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running out-of-band interrupt handlers immediately upon IRQ receipt,
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which cannot be delayed by the regular kernel work.
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Released patches can be downloaded from:
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https://xenomai.org/downloads/ipipe[https://xenomai.org/downloads/ipipe].
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There are two flavors of patches available: Dovetail for kernels starting with 5.10 and I-pipe for older kernels.
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Dovetail-enabled kernels are available here:
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https://source.denx.de/Xenomai/linux-dovetail[https://source.denx.de/Xenomai/linux-dovetail]
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Released I-pipe patches can be downloaded from:
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https://xenomai.org/downloads/ipipe[https://xenomai.org/downloads/ipipe]
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The current development trees (starting from kernel 4.14) for the
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I-pipe are available from:
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