Update readme.md

DRACKSim-Detailed/readme.md

@@ -44,6 +44,6 @@ cd ..
 	- '**-S n**' : skip '**n**' initial instructions
 	- '**-S**' and '**-T**' can be used together; skipping will be done in multi-threaded part if '**-T 1**' is used.
 	- '**-M**' : Number of instructions to trace and simulate (default 10000000) 	
-* In the second terminal, start simulator DRackSim and pass the name of the output directory to it, e.g., ' **./DRackSim abc** '
+* In the second terminal, start simulator DRackSim and pass the name of the output directory to it, e.g., ' **./DRackSim abc numINST (1M default)** '
 * The simulation will start and continue until the exit condition arrives.
 * The frequency of printing results can be changed using pre-processor #Result_cycle in main.cpp