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[SYSTEMDS-3961] Add Sparsity-based Recompiler Class to Recompilation Routine #2596

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[SYSTEMDS-3961] Add Sparsity-based Recompiler Class to Recompilation Routine #2596

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d5f9984
feat(main/hops/recompile/SparsityDAGRecompiler.java): create class fo…
ywcb00 Aug 20, 2026
74cc41b
feat(main/hops/recompile/SparsityDAGRecompiler.java): mimic the spars…
ywcb00 Aug 24, 2026
6da1ba8
chore(main/hops/recompile/SparsityDAGRecompiler.java): create member …
ywcb00 Aug 25, 2026
678cd3e
chore(main/hops/recompile/SparsityDAGRecompiler.java): print nnz info…
ywcb00 Aug 25, 2026
a40a88a
chore(main/hops/recompile/SparsityDAGRecompiler.java): add license he…
ywcb00 Aug 25, 2026
aec19ba
chore(**): apply formatting
ywcb00 Aug 25, 2026
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8 changes: 5 additions & 3 deletions src/main/java/org/apache/sysds/conf/DMLConfig.java
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Original file line number Diff line number Diff line change
Expand Up @@ -98,8 +98,9 @@ public class DMLConfig
public static final String NATIVE_BLAS = "sysds.native.blas";
public static final String NATIVE_BLAS_DIR = "sysds.native.blas.directory";
public static final String DAG_LINEARIZATION = "sysds.compile.linearization";
public static final String SPARSITY_REWRITES = "sysds.rewrites.sparsity.enabled"; // boolean
public static final String SPARSITY_ESTIMATOR = "sysds.rewrites.sparsity.estimator"; // see EstiamtionUtils.EstimatorType
public static final String SPARSITY_REWRITES = "sysds.sparsity.rewrites.enabled"; // boolean
public static final String SPARSITY_RECOMPILE = "sysds.sparsity.recompile.enabled"; // boolean
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ywcb00 marked this conversation as resolved.
public static final String SPARSITY_ESTIMATOR = "sysds.sparsity.estimator"; // see EstiamtionUtils.EstimatorType
public static final String CODEGEN = "sysds.codegen.enabled"; //boolean
public static final String CODEGEN_API = "sysds.codegen.api"; // see SpoofCompiler.API
public static final String CODEGEN_COMPILER = "sysds.codegen.compiler"; //see SpoofCompiler.CompilerType
Expand Down Expand Up @@ -192,6 +193,7 @@ public class DMLConfig
_defaultVals.put(COMPRESSED_TRANSFORMENCODE, "false");
_defaultVals.put(DAG_LINEARIZATION, DagLinearizer.DEPTH_FIRST.name());
_defaultVals.put(SPARSITY_REWRITES, "false");
_defaultVals.put(SPARSITY_RECOMPILE, "false");
_defaultVals.put(SPARSITY_ESTIMATOR, EstimatorType.BASIC_AVG.name());
_defaultVals.put(CODEGEN, "false" );
_defaultVals.put(CODEGEN_API, GeneratorAPI.JAVA.name() );
Expand Down Expand Up @@ -481,7 +483,7 @@ public String getConfigInfo() {
COMPRESSED_LINALG, COMPRESSED_LOSSY, COMPRESSED_VALID_COMPRESSIONS, COMPRESSED_OVERLAPPING,
COMPRESSED_SAMPLING_RATIO, COMPRESSED_SOFT_REFERENCE_COUNT,
COMPRESSED_COCODE, COMPRESSED_TRANSPOSE, COMPRESSED_TRANSFORMENCODE, DAG_LINEARIZATION,
SPARSITY_REWRITES, SPARSITY_ESTIMATOR,
SPARSITY_REWRITES, SPARSITY_RECOMPILE, SPARSITY_ESTIMATOR,
CODEGEN, CODEGEN_API, CODEGEN_COMPILER, CODEGEN_OPTIMIZER, CODEGEN_PLANCACHE, CODEGEN_LITERALS,
STATS_MAX_WRAP_LEN, LINEAGECACHESPILL, COMPILERASSISTED_RW, BUFFERPOOL_LIMIT, MEMORY_MANAGER,
PRINT_GPU_MEMORY_INFO, AVAILABLE_GPUS, SYNCHRONIZE_GPU, EAGER_CUDA_FREE, GPU_RULE_BASED_PLACEMENT,
Expand Down
8 changes: 7 additions & 1 deletion src/main/java/org/apache/sysds/hops/recompile/Recompiler.java
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Expand Up @@ -46,6 +46,7 @@
import org.apache.sysds.common.Types.ValueType;
import org.apache.sysds.conf.CompilerConfig.ConfigType;
import org.apache.sysds.conf.ConfigurationManager;
import org.apache.sysds.conf.DMLConfig;
import org.apache.sysds.hops.DataGenOp;
import org.apache.sysds.hops.DataOp;
import org.apache.sysds.hops.FunctionOp;
Expand Down Expand Up @@ -387,6 +388,11 @@ else if( !codegen ) {
memo.extract(hops, status);
}

// sparsity-based DAG recompilation if enabled
if(ConfigurationManager.getDMLConfig().getBooleanValue(DMLConfig.SPARSITY_RECOMPILE)) {
hops = SparsityDAGRecompiler.optimize(hops, ec);
}

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ywcb00 marked this conversation as resolved.
// codegen if enabled
if( codegen ) {
//create deep copy for in-place
Expand All @@ -396,7 +402,7 @@ else if( !codegen ) {
hops = SpoofCompiler.optimize(hops,
(status==null || !status.isInitialCodegen()));
}

// set max parallelism constraint to ensure compilation
// incl rewrites does not lose these hop-lop constraints
Hop.resetVisitStatus(hops);
Expand Down
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