Add instructions for args-file

README.md

@@ -80,5 +80,20 @@ See [this blog post](https://ross-org.github.io/setup/running-sim.html) for deta
   ./your-model --synch=1               // sequential mode
   mpirun -np 2 ./your-model --synch=2  // conservative mode
   mpirun -np 2 ./your-model --synch=3  // optimistic mode
+  ```
+You can pass arguments to your model from the command line as shown below.
+  ``` 
   ./your-model --synch=4               // optimistic debug mode (note: not a parallel execution!)
   ```
+However, for better readability, it is also possible to pass command line arguments through a text file.
+A sample text file sample.txt is included below.
+  ```
+  # Synchonization protocol
+  --synch=4
+  # AVL Tree contains 2^avl-size nodes (default 18)
+  --avl-size=18
+  ```
+The text file is then parsed by ROSS through the args-file command line argument.
+  ```
+  ./your-model --args-file=sample.txt
+  ```