Add a solver setting for controlling adaptive regularization in barrier - #1743
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rg20 wants to merge 6 commits into
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Add a solver setting for controlling adaptive regularization in barrier#1743rg20 wants to merge 6 commits into
rg20 wants to merge 6 commits into
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Included review availability: Your plan provides up to 12 included reviews per hour; 9 remain after this review. 📝 WalkthroughWalkthroughThe PR adds a configurable barrier adaptive regularization setting with automatic, disabled, and enabled modes. PDLP propagates the setting to the barrier solver, which applies it to regularization checks, logging, and initial dual perturbation. ChangesAdaptive regularization control
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🔵 Low · up to The PR exposes adaptive regularization control, but the documentation does not specify the exact condition used by automatic mode, which may lead users to misinterpret solver behavior. The change is mergeable with explicit owner follow-up to clarify that condition. Suggested reviewers: 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
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✨ Finishing Touches🧪 Generate unit tests (beta)
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rg20
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Inline comments:
In `@cpp/src/barrier/barrier.cu`:
- Around line 4188-4193: Compute the selected adaptive regularization policy and
initialize the corresponding perturbations, including
iteration_data_t::dual_perturb, before form_augmented(true) and
initial_point(data) run; ensure the same ordering is applied at the other
reported location so the initial augmented-system factorization uses the
selected policy.
In `@cpp/src/dual_simplex/simplex_solver_settings.hpp`:
- Line 168: Initialize
simplex_solver_settings_t::barrier_adaptive_regularization to -1, using either
its in-class initializer or the user-provided constructor, so it defaults to
automatic mode like pdlp_solver_settings_t.
In `@cpp/src/math_optimization/solver_settings.cu`:
- Line 191: Update the description for CUOPT_BARRIER_ADAPTIVE_REGULARIZATION in
int_parameters to document its integer tri-state values as -1 automatic, 0
disabled, and 1 enabled, replacing the current boolean wording.
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cpp/include/cuopt/mathematical_optimization/constants.hcpp/include/cuopt/mathematical_optimization/pdlp/solver_settings.hppcpp/src/barrier/barrier.cucpp/src/dual_simplex/simplex_solver_settings.hppcpp/src/math_optimization/solver_settings.cucpp/src/pdlp/solve.cu
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Inline comments:
In `@docs/cuopt/source/convex-settings.rst`:
- Around line 395-399: Update the automatic-mode bullet for
CUOPT_BARRIER_ADAPTIVE_REGULARIZATION to state that adaptive regularization is
enabled when the problem has cones and disabled for non-conic problems, while
preserving the documented default and other value descriptions.
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docs/cuopt/source/convex-settings.rst
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/ok to test ef2a58d |
CI Test Summary8 failed · 23 passed · 0 skipped
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yuwenchen95
approved these changes
Aug 19, 2026
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| // -1 automatic: enable for cones, disable otherwise; 0 off; 1 on | ||
| template <typename i_t, typename f_t> | ||
| bool should_use_adaptive_regularization(const simplex_solver_settings_t<i_t, f_t>& settings, |
Contributor
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Nit: rename should_use_adaptive_regularization to check_adaptive_regularization.
Contributor
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I disagree. check would imply that you are checking something about the regularization.
should_use is better if you are deciding if you should apply the regularization.
Alternatives would be should_apply_adaptive_regularization or just apply_adaptive_regularization.
ramakrishnap-nv
approved these changes
Aug 19, 2026
chris-maes
reviewed
Aug 19, 2026
| // (before form_augmented / initial_point). | ||
| const bool adaptive_regularization = | ||
| should_use_adaptive_regularization(settings, data.has_cones()); | ||
| if (settings.barrier_adaptive_regularization == -1 && adaptive_regularization) { |
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Shouldn't it be settings.barrier_adaptive_regularization != 0?
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That is, you also want to turn it on when the user explicitly sets it to 1.
chris-maes
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Aug 19, 2026
chris-maes
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chris-maes
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LGTM. You might change it so that this is turned on when the users set adapative_regularization = 1. But otherwise fine to merge as is.
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Description
Exposes a setting to control adaptive regularization in the barrier solver, instead of hard-coding it to cone problems only. By default this is still enabled only for cone problems only, so there is no regression in the default behavior of the solver.
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