diff --git a/scripts/perf/nvmf/README.md b/scripts/perf/nvmf/README.md
index 7cbce0819..035dd47f3 100644
--- a/scripts/perf/nvmf/README.md
+++ b/scripts/perf/nvmf/README.md
@@ -69,6 +69,9 @@ Run the script on the NVMe-oF target system:
 
     cd spdk
     sudo PYTHONPATH=$PYTHONPATH:$PWD/scripts scripts/perf/nvmf/run_nvmf.py
+The script uses the config.json configuration file in the scripts/perf/nvmf directory by default. You can
+specify a different configuration file at runtime as shown below:
+sudo PYTHONPATH=$PYTHONPATH:$PWD/scripts scripts/perf/nvmf/run_nvmf.py /path/to/config file/json config file
 
 The script uses another spdk script (scripts/rpc.py) so we pass the path to rpc.py by setting the Python path
 as a runtime environment parameter.
diff --git a/scripts/perf/nvmf/run_nvmf.py b/scripts/perf/nvmf/run_nvmf.py
index 953181899..6c7418ca3 100755
--- a/scripts/perf/nvmf/run_nvmf.py
+++ b/scripts/perf/nvmf/run_nvmf.py
@@ -653,7 +653,14 @@ if __name__ == "__main__":
     spdk_zip_path = "/tmp/spdk.zip"
     target_results_dir = "/tmp/results"
 
-    with open("./scripts/perf/nvmf/config.json", "r") as config:
+    if (len(sys.argv) > 1):
+        config_file_path = sys.argv[1]
+    else:
+        script_full_dir = os.path.dirname(os.path.realpath(__file__))
+        config_file_path = os.path.join(script_full_dir, "config.json")
+
+    print("Using config file: %s" % config_file_path)
+    with open(config_file_path, "r") as config:
         data = json.load(config)
 
     initiators = []