#0: Addded comments to the file

* Addresses issue #18064 (more specifically #16439)

tests/tt_metal/tt_metal/integration/matmul/test_matmul_hang.cpp

@@ -213,12 +213,10 @@ using namespace tt::test_utils;
 using namespace unit_tests_common::matmul::test_matmul_blackhole_hang;
 
 TEST_F(DispatchFixture, TestMatmulBlackholeHangCombined) {
-    uint32_t M1 = 2;
-    uint32_t K1 = 4;
-    uint32_t N1 = 4;
-    uint32_t M2 = 2;
-    uint32_t K2 = 4;
-    uint32_t N2 = 8;
+    // First iteration setup
+    uint32_t M1 = 2; /* M = 512 from test_benchmark */
+    uint32_t K1 = 4; /* K = 1024 from test_benchmark */
+    uint32_t N1 = 4; /* N = 1024 from test_benchmark */
     MatmulHangConfig matmul_config1 = {
         .M = M1,
         .K = K1,
@@ -248,6 +246,13 @@ TEST_F(DispatchFixture, TestMatmulBlackholeHangCombined) {
                 0,  /* untilize_out */
             },
         .math_fidelity = MathFidelity(4)};
+    MatmulHangStimuli stimuli1;
+    create_test_stimuli(stimuli1, M1, K1, N1);
+
+    // Second iteration setup
+    uint32_t M2 = 2; /* M = 512 from test_benchmark */
+    uint32_t K2 = 4; /* K = 1024 from test_benchmark */
+    uint32_t N2 = 8; /* N = 2048 from test_benchmark */
     MatmulHangConfig matmul_config2 = {
         .M = M2,
         .K = K2,
@@ -277,10 +282,11 @@ TEST_F(DispatchFixture, TestMatmulBlackholeHangCombined) {
                 0,  /* untilize_out */
             },
         .math_fidelity = MathFidelity(4)};
-    MatmulHangStimuli stimuli1;
-    create_test_stimuli(stimuli1, M1, K1, N1);
     MatmulHangStimuli stimuli2;
     create_test_stimuli(stimuli2, M2, K2, N2);
+
+    // First iteration execution
     matmul_tile(this, devices_.at(0), matmul_config1, stimuli1.a, stimuli1.w, stimuli1.t);
+    // Second iteration execution
     matmul_tile(this, devices_.at(0), matmul_config2, stimuli2.a, stimuli2.w, stimuli2.t);
 }