add dummy knobs header file

include/dmmlib/CMakeLists.txt

@@ -5,6 +5,7 @@ set(dmmlib_HDRS
   dmmlib.h
   dmmstats.h 
   raw_block.h
+  knobs.h
 )
 
 if(RAW_BLOCKS_TYPE STREQUAL "freelist")

include/dmmlib/knobs.h

@@ -0,0 +1,10 @@
+struct rtm_knobs_t {
+	struct p {
+		double sysallocsize;
+		double fitpercentage;
+	};
+	struct m {
+		double avr_req_sz;
+		double tot_req_sz;
+	};
+};