diff --git a/aha/util/regress.py b/aha/util/regress.py
index 602a6823..7d0376e2 100644
--- a/aha/util/regress.py
+++ b/aha/util/regress.py
@@ -236,22 +236,19 @@ def test_sparse_app(testname, seed_flow, data_tile_pairs, pipeline_num_l=None, o
             use_pipeline = False
         start = time.time()
         if use_pipeline:
-            # Last batch won't have the same number of tiles as the rest, so we do two VCS calls
             data_tile_pairs = [f"{test}_{tile}/GLB_DIR/{test}_combined_seed_{tile}" for tile in data_tile_pairs]
-            full_tile_pairs = []
-            full_pipeline_cmd = None
-            # if there's only one batch, we don't need to handle partially full batches
-            if len(data_tile_pairs) > 1:
-                full_tile_pairs = data_tile_pairs[:-1]
-                full_pipeline_num = pipeline_num_l[0]
-                full_pipeline_cmd = ["aha", "test"] + full_tile_pairs + ["--sparse", "--multiles", str(full_pipeline_num)]
-            last_tile_pair = data_tile_pairs[-1]
-            last_pipeline_num = pipeline_num_l[-1]
-            last_pipeline_cmd = ["aha", "test"] + [last_tile_pair] + ["--sparse", "--multiles", str(last_pipeline_num)]
-
-            cmd_list = [full_pipeline_cmd, last_pipeline_cmd]
-            if len(full_tile_pairs) == 0:
-                cmd_list = [last_pipeline_cmd]
+            # Dictionary grouping tile pairs by pipeline number
+            grouped_dict = defaultdict(list)
+            for tile_pair, pipeline_num in zip(data_tile_pairs, pipeline_num_l):
+                grouped_dict[pipeline_num].append(tile_pair)
+
+            # create cmd_list for each pipeline number
+            cmd_list = []
+            for pipeline_num, tile_pairs in grouped_dict.items():
+                # if list is longer than 64, split into batches of 64
+                tile_pair_batches = [tile_pairs[i:i + 64] for i in range(0, len(tile_pairs), 64)]
+                for tile_pair in tile_pair_batches:
+                    cmd_list.append(["aha", "test"] + tile_pair + ["--sparse", "--multiles", str(pipeline_num)])
             
             if testname not in test_dataset_runtime_dict:
                 test_dataset_runtime_dict[testname] = defaultdict(float)
diff --git a/garnet b/garnet
index f19c53ee..4693e6ea 160000
--- a/garnet
+++ b/garnet
@@ -1 +1 @@
-Subproject commit f19c53eef45eda2192733b241526238380884ad0
+Subproject commit 4693e6eacb2eb915db14a782f2f14c96a1225757
diff --git a/sam b/sam
index 516b686f..e7a5129e 160000
--- a/sam
+++ b/sam
@@ -1 +1 @@
-Subproject commit 516b686fa64be12ebcc70b31b827e9036ef7f297
+Subproject commit e7a5129e4fa64ef1c9b86d738a11055370f238fe