Changes between Version 57 and Version 58 of WikiStart


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Jan 11, 2020, 6:11:38 PM (4 years ago)
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alain
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  • WikiStart

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    5 This document describes the general principles of ALMOS-MKH, which is an operating system targeting manycore architectures with CC-NUMA (Coherent Cache, Non Uniform Memory Access) shared address space, such as the TSAR architecture which can support up to 1024 32-bit MIPS cores. ALMOS-MKH also targets INTEL / AMD multi-core architectures using 64-bit I86 cores.
     5This document describes the general principles of ALMOS-MKH, which is an operating system targeting manycore architectures with CC-NUMA (Coherent Cache, Non Uniform Memory Access) shared address space, such as the TSAR architecture which can support up to 1024 32-bit MIPS cores. ALMOS-MKH also targets INTEL based multi-core servers using 64-bit I86 cores.
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    77Targeted architectures are assumed to be clustered, with one or more core and a physical memory bank per cluster. These architectures are supposed to support POSIX-compliant  multi-threaded parallel applications.
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    99ALMOS-MKH inherited from the ALMOS system, developed by Ghassan Almaless. The general principles of the ALMOS system are described in his thesis.
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    11 A first version of ALMOS-MKH, and in particular the distributed file system and the RPC communication mechanism were developed by Mohamed Karaoui. The general principles of the proposed Multi-Kernel approach are described in his thesis. This system was called ALMOS-MK without H.
     11A first version of ALMOS-MKH, and in particular the distributed file system and the RPC communication mechanism were developed by Mohamed Karaoui. The general principles of the proposed Multi-Kernel approach are described in his thesis. This system was called ALMOS-MK (without H).
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    1313ALMOS-MKH is based on the "Multi-Kernel" approach to ensure scalability, and support the distribution of system services. In this approach, each cluster of the architecture contains an instance of the kernel. Each instance controls the local resources (memory and computing cores). These multiple instances cooperate with each other to give applications the image of a single system controlling all resources. They communicate with each other using both (i) the client / server model, sending a remote procedure call  (RPC) to a remote cluster for a complex service, (ii) the shared memory paradigm, making direct access to remote memory when required.