SQL Server Running Requests and Blocking Chain

SELECT r.session_id, r.blocking_session_id, r.status, r.command,
       r.wait_type, r.wait_time AS wait_ms,
       r.cpu_time, r.logical_reads,
       DB_NAME(r.database_id) AS db_name,
       s.login_name, s.host_name,
       SUBSTRING(t.text, (r.statement_start_offset/2)+1,
         ((CASE r.statement_end_offset WHEN -1 THEN DATALENGTH(t.text)
           ELSE r.statement_end_offset END - r.statement_start_offset)/2)+1) AS running_statement
FROM sys.dm_exec_requests r
JOIN sys.dm_exec_sessions s ON s.session_id = r.session_id
CROSS APPLY sys.dm_exec_sql_text(r.sql_handle) t
WHERE r.session_id <> @@SPID
  AND s.is_user_process = 1
ORDER BY r.blocking_session_id DESC, r.wait_time DESC;