• Jens Domke's avatar
    OpenSM: dfsssp - ignore throttled links in fabric · df30f25e
    Jens Domke authored
    Throttled links, either because they are faulty or throttled intentionally,
    aren't good for the achievable performance of an HPC system.
    During the discovery process, (DF)SSSP analyzes the theoretical maximum
    link speed, which both ends support and compares it to the actual link
    speed. If these numbers don't match, then the link is ignored as
    potential path for routes between nodes.
    
    The implementation of the link state analyzer is also available to other
    routing engines and the patch adds an option in OpenSM conf to control
    the feature (default is 'disabled' to preserve current behavior).
    df30f25e
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