# engine.calibration { #mlsysim.engine.calibration } `engine.calibration` Parameters for analytical solvers and the roofline engine. These values tune ``mlsysim.solvers`` models and ``mlsysim.engine.engine.Engine`` when callers omit explicit arguments. Not appendix-facing — use semantic registries such as ``Literature.*``, ``Systems.*``, ``Infrastructure.*``, ``Ops.*``, and ``Scenarios.*`` or ``ReferenceStats.*`` for book-cited numbers.