[CI] Verbose flag check (#725)

It'd actually be nice to have a line printed for each test that runs.
Next step: set up a few levels of verbosity

0: nothing
1: a line for each test run
2: default, sensible
3: debug 

Need to understand what 'count' in 
```
 parser.add_argument("-v", "--verbose", action="count", default=0) 
```

.github/workflows/ci-linux.yml

@@ -175,15 +175,20 @@ jobs:
             $PWD/llvm-aie \
             --xrt-dir /opt/xilinx/xrt \
             --test-set='Smoke' \
-            --do-not-run-aie
+            --do-not-run-aie > smoke_output.log 2>&1
 
-          # Assert that output.log is empty (because verbose=0)
-          if [ -s output.log ]; then
-            echo "output.log is not empty:"
-            cat output.log
+          # Assert that smoke_output.log is empty (because verbose=0)
+          # First assert that smoke_output.log exists:
+          if [ ! -f smoke_output.log ]; then
+            echo "smoke_output.log does not exist."
+            exit 1
+          fi
+          if [ -s smoke_output.log ]; then
+            echo "smoke_output.log is not empty:"
+            cat smoke_output.log
             exit 1
           else
-            echo "output.log is empty"
+            echo "smoke_output.log is empty"
           fi
 
       - name : E2E comparison of AIE to llvm-cpu

build_tools/ci/cpu_comparison/run_test.py

@@ -522,7 +522,8 @@ def aie_vs_llvm_cpu(
         return
 
     name = name_from_mlir_filename(test_file)
-    print(f"Running {name} test")
+    if config.verbose:
+        print(f"Running {name} test")
 
     input_args = generate_inputs(test_file, config.output_dir, seed)
 
@@ -627,7 +628,14 @@ def run(self, config):
         test_name = output_dir / "test_from_template_full_bias.mlir"
         template_name = matmul_template_dir / "matmul_bias_MxK_KxN_MxN.mlir"
         generate_matmul_test(test_name, template_name, 128, 128, 256, "i32", "i32")
-        aie_vs_llvm_cpu(config, test_name, tile_pipeline="pack-peel", lower_to_aie_pipeline="air", rtol=0, atol=0)
+        aie_vs_llvm_cpu(
+            config,
+            test_name,
+            tile_pipeline="pack-peel",
+            lower_to_aie_pipeline="air",
+            rtol=0,
+            atol=0,
+        )
 
         if config.xdna_datetime and config.xdna_datetime < 20240801:
             for name in [
@@ -652,30 +660,46 @@ def run(self, config):
         # Test(s) of the form matmul(A,B) + C where A:MxK, B:KxN, C:N
         test_name = output_dir / "test_from_template_bias_N.mlir"
         template_name = matmul_template_dir / "matmul_bias_MxK_KxN_N.mlir"
-        generate_matmul_test(
-            test_name, template_name, 1024, 1024, 512, "bf16", "f32"
-        )
+        generate_matmul_test(test_name, template_name, 1024, 1024, 512, "bf16", "f32")
         if config.vitis_dir:
             aie_vs_llvm_cpu(
-                config, test_name, tile_pipeline="pack-peel", lower_to_aie_pipeline="air", use_ukernel=True
+                config,
+                test_name,
+                tile_pipeline="pack-peel",
+                lower_to_aie_pipeline="air",
+                use_ukernel=True,
             )
         aie_vs_llvm_cpu(
-            config, test_name, tile_pipeline="pack-peel", lower_to_aie_pipeline="air", use_ukernel=False
+            config,
+            test_name,
+            tile_pipeline="pack-peel",
+            lower_to_aie_pipeline="air",
+            use_ukernel=False,
         )
 
         # Test(s) of the form batch_matmul(A,B) where A:BxMxK, B:BxKxN
         template_name = matmul_template_dir / "batch_matmul_BxMxK_BxKxN.mlir"
-        for (lhs_type, acc_type) in zip(["i32", "bf16"], ["i32", "f32"]):
-            test_name = output_dir / f"test_from_template_bmm_1_{lhs_type}_{acc_type}.mlir"
-            generate_matmul_test(test_name, template_name, 128, 128, 256, lhs_type, acc_type, b=1)
-            aie_vs_llvm_cpu(config, test_name, tile_pipeline="pack-peel", lower_to_aie_pipeline="objectFifo")
+        for lhs_type, acc_type in zip(["i32", "bf16"], ["i32", "f32"]):
+            test_name = (
+                output_dir / f"test_from_template_bmm_1_{lhs_type}_{acc_type}.mlir"
+            )
+            generate_matmul_test(
+                test_name, template_name, 128, 128, 256, lhs_type, acc_type, b=1
+            )
+            aie_vs_llvm_cpu(
+                config,
+                test_name,
+                tile_pipeline="pack-peel",
+                lower_to_aie_pipeline="objectFifo",
+            )
 
             # TODO (vivian): The below tests are batch matmul with batch size equals 2, and have different
             # numerics compared to CPU results. Comment these out until we have a fix.
             # test_name = output_dir / f"test_from_template_bmm_2_{lhs_type}_{acc_type}.mlir"
             # generate_matmul_test(test_name, template_name, 64, 64, 64, lhs_type, acc_type, b=2)
             # aie_vs_llvm_cpu(config, test_name, tile_pipeline="pack-peel", lower_to_aie_pipeline="objectFifo")
 
+
 class SmokeSet(TestSet):
     def __init__(self):
         super().__init__("Smoke")
@@ -837,7 +861,20 @@ def all_tests(
         ),
     )
 
-    parser.add_argument("-v", "--verbose", action="count", default=0)
+    parser.add_argument(
+        "-v",
+        "--verbose",
+        action="count",
+        default=0,
+        help=dedent(
+            """
+            Verbosity level. Currently 
+            0: total silence. 
+            1 (-v) : almost everything. 
+            2 (-vv) : everything.
+            """
+        ),
+    )
 
     parser.add_argument(
         "--reset-npu-between-runs",