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# S4BXI |
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# S4BXI
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S4BXI is a simulator of the [Portals4 network API](https://cs.sandia.gov/Portals/). It is written using SimGrid's S4U interface, which provides a fast flow-model. More specifically, this simulator is tuned to model as best as possible Bull's hardware implementation of portals ([BXI interconnect](https://atos.net/produits/calcul-haute-performance-hpc/bxi-bull-exascale-interconnect))
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This documentation covers:
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- [Installation](installation): how to setup S4BXI and its dependencies
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- [Usage](usage): how to run your Portals applications in simulation
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- [Network model](network-model): details about the internal flow model for communications
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- [CPU model](cpu-model): details about the internal model for computation on the CPU |