fix(disk_perf): styling and readability

Signed-off-by: Mathieu Labourier <[email protected]>

Author: Millefeuille42

tests/storage/benchmarks/conftest.py

@@ -72,12 +72,12 @@ def running_unix_vm_and_vbd(host, vdi_on_local_sr, running_unix_vm_with_fio):
 
 @pytest.fixture(scope="module")
 def vm_with_vbd(running_unix_vm_and_vbd):
-    vm, _vbd = running_unix_vm_and_vbd
+    vm, _ = running_unix_vm_and_vbd
     return vm
 
 @pytest.fixture(scope="module")
 def plugged_vbd(running_unix_vm_and_vbd):
-    _vm, vbd = running_unix_vm_and_vbd
+    _, vbd = running_unix_vm_and_vbd
     return vbd
 
 @pytest.fixture(scope="module")

tests/storage/benchmarks/test_disk_perf.py

@@ -25,7 +25,8 @@
 system_memory = os.sysconf('SC_PAGE_SIZE') * os.sysconf('SC_PHYS_PAGES')
 
 block_sizes = ("4k", "16k", "64k", "1M")
-file_sizes = ("1G", "4G", f"{(system_memory/(1024.**3))*2}G")
+file_sizes = ("1G", "4G", f"{int((system_memory//(1024.**3))*2)}G")
+
 modes = (
         "read",
         "randread",
@@ -139,7 +140,7 @@ def test_disk_benchmark(
             )
             summary = log_result_csv(test_type, rw_mode, result, CSV_FILE)
             assert summary["IOPS"] > 0
-        results = load_results_from_csv(CSV_FILE)
         key = (test_type, rw_mode)
         if prev_results and key in prev_results:
+            results = load_results_from_csv(CSV_FILE)
             assert_performance_not_degraded(results[key], prev_results[key])