fix bugs in c code, update interpolation, etc
diff --git a/configs-examples/perf_lab.yml b/configs-examples/perf_lab.yml
index b53dfa4..ddb05be 100644
--- a/configs-examples/perf_lab.yml
+++ b/configs-examples/perf_lab.yml
@@ -9,9 +9,11 @@
 nodes:
     root@cz7625: testnode
 
+sleep: 5
+
 tests:
   - fio:
-      load: ceph
+      load: verify
       params:
           FILENAME: /dev/rbd0
-          FILESIZE: 100G
\ No newline at end of file
+          FILESIZE: 100G