Patch for Open XDMoD mitigating the issue with suspended jobs wall time beeing overestimated(Interested? Check whole article:https://funinit.wordpress.com/2018/11/23/notes-from-the-xdmod-patch-mitigating-the-issue-with-overestimated-wall-time-for-suspended-jobs/)

xdmod-suspended-overestimate.patch

diff --git a/classes/OpenXdmod/Shredder.php b/classes/OpenXdmod/Shredder.php
index 1a55a57b..951baf48 100644
--- a/classes/OpenXdmod/Shredder.php
+++ b/classes/OpenXdmod/Shredder.php
@@ -810,6 +810,14 @@ class Shredder
             $errorMessages[] = 'Job start time as after job end time.';
             $valid = false;
         }
+       elseif ( $startTime !== null
+             && $endTime != null
+              && $walltime != null
+              && ($endTime - $startTime) > $walltime ) {
+             $this->logger->debug('Found difference between end time and start time ('.$endTime-$startTime.') bigger than walltime ('.$walltime.') reported by scheduler. Probably job was suspended or gang scheduled');
+             $errorMessages[] = 'Difference between job end and start times is bigger than wall time reported by scheduler. Probably job was suspended or gang scheduled.';
+             $valid = false;
+       }

         return array($valid, $errorMessages);
     }
@@ -872,6 +880,14 @@ class Shredder
             $startTime = $endTime - $walltime;
             $this->logger->debug("Setting start time to $startTime");
         }
+       elseif ( ($endTime - $startTime) > $walltime)
+        {
+           // Fix end time to startTime + walltime.
+           //If those doesn't match duratin is probably overestimated -
+      // because of job suspention or gang scheduling mechanisms
+           $endTime = $startTime + $walltime;
+            $this->logger->debug("Setting end time to $endTime");
+       }

         return array($startTime, $endTime, $walltime);
     }