Tempdb Latch Contention

SELECT
   session_id,
   wait_type,
   wait_duration_ms,
   blocking_session_id,
   resource_description,
   ResourceType = CASE
   WHEN PageID = 1 OR PageID % 8088 = 0 THEN 'Is PFS Page'
   WHEN PageID = 2 OR PageID % 511232 = 0 THEN 'Is GAM Page'
   WHEN PageID = 3 OR (PageID - 1) % 511232 = 0 THEN 'Is SGAM Page'
       ELSE 'Is Not PFS, GAM, or SGAM page'
   END
FROM (  SELECT 
           session_id,
           wait_type,
           wait_duration_ms,
           blocking_session_id,
           resource_description,
           CAST(RIGHT(resource_description, LEN(resource_description)
           - CHARINDEX(':', resource_description, 3)) AS INT) AS PageID
       FROM sys.dm_os_waiting_tasks
       WHERE wait_type LIKE 'PAGE%LATCH_%'
         AND resource_description LIKE '2:%') AS tab;