[exp] Dump PERF_EVENTS variables

bin/mc-2/exp

@@ -142,12 +142,14 @@ dump_args() {
 
     local args_file=$RESULTS_DIR/args
 
-    echo "PROGRAM   = $programs"    >>$args_file
-    echo "PINNING   = $pinnings"    >>$args_file
-    echo "NODES     = $nodes_list"  >>$args_file
-    echo "USE_PERF  = $use_perfs"   >>$args_file
-    echo "AUTOGROUP = $autogroups"  >>$args_file
-    echo "REPEAT    = $repeat"      >>$args_file
+    echo "PROGRAM     = $programs"    >>$args_file
+    echo "PINNING     = $pinnings"    >>$args_file
+    echo "NODES       = $nodes_list"  >>$args_file
+    echo "USE_PERF    = $use_perfs"   >>$args_file
+    echo "AUTOGROUP   = $autogroups"  >>$args_file
+    echo "REPEAT      = $repeat"      >>$args_file
+    echo
+    echo "PERF_EVENTS = $PERF_EVENTS" >>$args_file
 }
 
 dump_programs() {