diff --git a/aha/util/regress.py b/aha/util/regress.py
index 4bee9e02..d386e157 100644
--- a/aha/util/regress.py
+++ b/aha/util/regress.py
@@ -93,6 +93,7 @@ def gen_garnet(width, height, dense_only=False, using_matrix_unit=False, mu_data
             buildkite_args.append("--using-matrix-unit")
             buildkite_args.append("--mu-datawidth")
             buildkite_args.append(str(mu_datawidth))
+            buildkite_args.append("--give-north-io-sbs")
 
         buildkite_call(buildkite_args)
         
@@ -133,6 +134,7 @@ def generate_sparse_bitstreams(sparse_tests, width, height, seed_flow, data_tile
             build_tb_cmd.append("--opal-workaround")
         if using_matrix_unit:
             build_tb_cmd.append("--using-matrix-unit")
+            build_tb_cmd.append("--give-north-io-sbs")
         buildkite_call(
             build_tb_cmd,
             env=env_vars,
@@ -166,6 +168,7 @@ def generate_sparse_bitstreams(sparse_tests, width, height, seed_flow, data_tile
             build_tb_cmd.append("--opal-workaround")
         if using_matrix_unit:
             build_tb_cmd.append("--using-matrix-unit")
+            build_tb_cmd.append("--give-north-io-sbs")
         buildkite_call(
             build_tb_cmd,
             env=env_vars,
@@ -342,7 +345,8 @@ def test_dense_app(test, width, height, env_parameters, extra_args, layer=None,
 
     if using_matrix_unit:
         buildkite_args.append("--using-matrix-unit")
-        env_vars["WEST_IN_IO_SIDES"] = "1"
+        buildkite_args.append("--give-north-io-sbs")
+        #env_vars["WEST_IN_IO_SIDES"] = "1"
         env_vars["USING_MATRIX_UNIT"] = "1"
         env_vars["OC_0"] = str(2*cgra_height)
         env_vars["MU_DATAWIDTH"] = str(mu_datawidth)
@@ -431,6 +435,7 @@ def test_hardcoded_dense_app(test, width, height, env_parameters, extra_args, la
 
     if using_matrix_unit:
         buildkite_args.append("--using-matrix-unit")
+        buildkite_args.append("--give-north-io-sbs")
         env_vars["WEST_IN_IO_SIDES"] = "1"
         env_vars["USING_MATRIX_UNIT"] = "1"
         env_vars["OC_0"] = str(2*cgra_height)
@@ -619,4 +624,4 @@ def dispatch(args, extra_args=None):
 
 
 def gather_tests(tags):
-    pass
+    pass
\ No newline at end of file
diff --git a/canal b/canal
index 420d831f..e4519748 160000
--- a/canal
+++ b/canal
@@ -1 +1 @@
-Subproject commit 420d831f0e22156af0268f99c891f43f812a50a6
+Subproject commit e4519748a276db4ba8ded8c37cf25dedf51695c3
diff --git a/garnet b/garnet
index fef07782..2b82ad99 160000
--- a/garnet
+++ b/garnet
@@ -1 +1 @@
-Subproject commit fef0778274597afa61275a02508c0a57839d613a
+Subproject commit 2b82ad99d282d3eabf3ccb462cea3211b465c3a1