Can also switch off adaptive stepsize and restarts

Author: jajhall

src/lp_data/HConst.h

@@ -321,10 +321,10 @@ const int8_t kPivotMarkowitz = 4;
 enum PdlpFeaturesOff {
   kPdlpAllFeaturesOn = 0,
   kPdlpScalingOff = 1,
-  kPdlpRestartsOff = 2,
+  kPdlpRestartOff = 2,
   kPdlpAdaptiveStepSizeOff = 4,
   kPdlpPrimalWeightUpdateOff = 8,
-  kPdlpAllFeaturesOff = kPdlpScalingOff + kPdlpRestartsOff +
+  kPdlpAllFeaturesOff = kPdlpScalingOff + kPdlpRestartOff +
                         kPdlpAdaptiveStepSizeOff + kPdlpPrimalWeightUpdateOff
 };
 

src/lp_data/HighsOptions.h

@@ -1086,7 +1086,7 @@ class HighsOptions : public HighsOptionsStruct {
 
     record_int = new OptionRecordInt(
         "pdlp_features_off",
-        "Mask for switching PDLP features off: 1 => Scaling; 2 => Restarts; 4 "
+        "Mask for switching PDLP features off: 1 => Scaling; 2 => Restart; 4 "
         "=> AdaptiveStepSize; 8 => PrimalWeightUpdate",
         advanced, &pdlp_features_off, kPdlpAllFeaturesOn, kPdlpAllFeaturesOn,
         kPdlpAllFeaturesOff);
@@ -1105,8 +1105,8 @@ class HighsOptions : public HighsOptionsStruct {
 
     record_int = new OptionRecordInt("pdlp_e_restart_method",
                                      "Restart mode for PDLP solver: 0 => none; "
-                                     "1 => GPU (default); 2 => CPU ",
-                                     advanced, &pdlp_e_restart_method, 0, 1, 2);
+                                     "1 => GPU",
+                                     advanced, &pdlp_e_restart_method, 0, 1, 1);
     records.push_back(record_int);
 
     record_double = new OptionRecordDouble(

src/pdlp/CupdlpWrapper.cpp

@@ -578,9 +578,25 @@ void getUserParamsFromOptions(const HighsOptions& options,
   intParam[N_LOG_LEVEL] = getCupdlpLogLevel(options);
   //
   ifChangeIntParam[IF_SCALING] = true;
-  cupdlp_int scaling_off = options.pdlp_features_off & kPdlpScalingOff;
-  cupdlp_int scaling_on = scaling_off == 0 ? 1 : 0;
+  cupdlp_int scaling_on =
+      (options.pdlp_features_off & kPdlpScalingOff) == 0 ? 1 : 0;
   intParam[IF_SCALING] = scaling_on;
+  if (scaling_on == 0)
+    highsLogUser(options.log_options, HighsLogType::kInfo,
+                 "PDLP: Scaling off\n");
+  //
+  ifChangeIntParam[E_LINE_SEARCH_METHOD] = true;
+  cupdlp_int adaptive_lineasearch =
+      (options.pdlp_features_off & kPdlpAdaptiveStepSizeOff) == 0 ? 1 : 0;
+  intParam[E_LINE_SEARCH_METHOD] = adaptive_lineasearch;
+  if (adaptive_lineasearch == 1) {
+    intParam[E_LINE_SEARCH_METHOD] = PDHG_ADAPTIVE_LINESEARCH;
+  } else {
+    intParam[E_LINE_SEARCH_METHOD] = PDHG_FIXED_LINESEARCH;
+  }
+  if (adaptive_lineasearch == 0)
+    highsLogUser(options.log_options, HighsLogType::kInfo,
+                 "PDLP: Adaptive line search off\n");
   //
   ifChangeFloatParam[D_PRIMAL_TOL] = true;
   floatParam[D_PRIMAL_TOL] = options.primal_feasibility_tolerance;
@@ -595,7 +611,13 @@ void getUserParamsFromOptions(const HighsOptions& options,
   floatParam[D_TIME_LIM] = options.time_limit;
   //
   ifChangeIntParam[E_RESTART_METHOD] = true;
-  intParam[E_RESTART_METHOD] = int(options.pdlp_e_restart_method);
+  cupdlp_int restart_on =
+      (options.pdlp_features_off & kPdlpRestartOff) == 0 ? 1 : 0;
+  if (options.pdlp_e_restart_method == 0) restart_on = 0;
+  intParam[E_RESTART_METHOD] = restart_on;
+  if (restart_on == 0)
+    highsLogUser(options.log_options, HighsLogType::kInfo,
+                 "PDLP: Restart off\n");
   //
   ifChangeIntParam[I_INF_NORM_ABS_LOCAL_TERMINATION] = true;
   intParam[I_INF_NORM_ABS_LOCAL_TERMINATION] = !options.pdlp_native_termination;