diff --git a/simulator/config/default.yml b/simulator/config/default.yml
index 600a1d0..a745979 100644
--- a/simulator/config/default.yml
+++ b/simulator/config/default.yml
@@ -83,7 +83,7 @@ sklearn_execution_time_predictor:
   nccl_cpu_launch_overhead_ms: 0.020
   nccl_cpu_skew_overhead_per_device_ms: 0.0
   num_training_job_threads: -1
-  skip_cpu_overhead_modeling: false
+  skip_cpu_overhead_modeling: true
 
 random_forrest_execution_time_predictor:
   num_estimators: