[Benchmark] Use actual number of cores in config name

Author: Tobias Kopp

benchmark/database_connectors/connector.py

@@ -1,5 +1,6 @@
 from abc import ABC, abstractmethod
 import os
+import multiprocessing
 
 DEFAULT_TIMEOUT = 30  # seconds
 TIMEOUT_PER_CASE = 10 # seconds
@@ -21,6 +22,12 @@ def __init__(self, what :str):
         super().__init__(what)
 
 
+
+# Helper function to get number of cores
+def get_num_cores():
+    return multiprocessing.cpu_count()
+
+
 #=======================================================================================================================
 # Connector Abstract Base Class (ABC)
 #=======================================================================================================================

benchmark/database_connectors/duckdb.py

@@ -21,7 +21,7 @@ def execute(self, n_runs, params: dict):
         suite = params['suite']
         benchmark = params['benchmark']
         experiment = params['name']
-        configname = 'DuckDB (multi core)' if self.multithreaded else 'DuckDB (single core)'
+        configname = f'DuckDB ({get_num_cores()} cores)' if self.multithreaded else 'DuckDB (single core)'
         tqdm.write(f'` Perform experiment {suite}/{benchmark}/{experiment} with configuration {configname}.')
 
         self.clean_up()

benchmark/database_connectors/hyper.py

@@ -27,7 +27,7 @@ def execute(self, n_runs, params: dict()):
         suite = params['suite']
         benchmark = params['benchmark']
         experiment = params['name']
-        suffix = ' (multi core)' if self.multithreaded else ' (single core)'
+        suffix = f' ({get_num_cores()} cores)' if self.multithreaded else ' (single core)'
         tqdm.write(f'` Perform experiment {suite}/{benchmark}/{experiment} with configuration HyPer{suffix}.')
 
         result = None