kryst 4.1.0

Krylov subspace and preconditioned iterative solvers for dense and sparse linear systems, with shared and distributed memory parallelism.
Documentation 
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{
  "schema_version": 1,
  "native_route": {
    "target_selected": "distributed_native",
    "selection_rate_min": 0.95,
    "per_case_required": [
      "poisson2d_g48_p4",
      "poisson3d_20x16x12_p4",
      "powerlaw_n4096_deg14_p4",
      "blocksys_96x24_ov2_p4"
    ]
  },
  "fallback": {
    "frequency_max": 0.05,
    "per_case_max_total": {
      "poisson2d_g48_p4": 0,
      "poisson3d_20x16x12_p4": 0,
      "powerlaw_n4096_deg14_p4": 0,
      "blocksys_96x24_ov2_p4": 0
    }
  },
  "performance": {
    "speedup_min": 1.20,
    "per_case_speedup_min": {},
    "current_time_keys": ["solve_ms", "total_solve_ms"],
    "baseline_time_keys": ["baseline_solve_ms", "baseline_total_solve_ms"]
  },
  "convergence": {
    "iteration_growth_max": 1.10,
    "residual_growth_max": 1.50,
    "iteration_keys": ["iterations"],
    "baseline_iteration_keys": ["baseline_iterations"],
    "final_residual_keys": ["final_residual"],
    "baseline_final_residual_keys": ["baseline_final_residual"]
  },
  "fallback_diagnostics": {
    "require_when_fallback": true,
    "required_fields": [
      "pc_dist_fallback_chain",
      "pc_dist_fallback_reason",
      "pc_dist_fallback_counters",
      "solver_view_snapshot"
    ]
  }
}