27 For more information, see  http://www.watsonwalker.com . Chapter 12. Minor z/OS notes  253 12.26 Disabled waits When you receive such a message, you can issue a command to display the PSW. The last  three characters of the PSW should contain a wait state code; an extended code may be also  present in other characters of the PSW. The following list provides abbreviated information  You might sometimes see a message in your zPDT Linux window such as this example: If you want to list a few details about the status of the LOGSTREAM, you might use the  following job: This job assumes your LOGSTREAM for SMF is named  IFASMF.GENERAL , which is the name  used in the parallel sysplex system for zPDT described in other documents. Your name might  differ.  If you use logstreams for SMF and want to determine the quantity of each SMF type being  collected, you might use the following job: The uses of the various exits specified in the SMF parameters, if present, is beyond the  scope of this book. If you have access to Cheryl Watson’s Tuning Letters, the 2009 letters  contain a useful and practical introduction to SMF usage. 27 Recent AD-CD system process full SMF datasets automatically, discarding the output. If you  want to process SMF data yourself, remove the IEFU29 exit that appears twice in the default  SMFPRMxx parameters. (We suggest that you eliminate recording of SMF record types that  you do not want before doing this.) If you have absolutely no interest in SMF data, we suggest you alter the SMFPRMxx  members in PARMLIB and change the first line from ACTIVE to NOACTIVE. If you might  have some interest in SMF job data (type 30) and perhaps RMF data (types 70 - 79) we  suggest the following line to produce minimal recording: SYS(TYPE(30,70:79),EXITS(IEFU83,IEFU84,IEFACTRT,IEFUSI,IEFUJI, IEFU29),NOINTERVAL,NODETAIL) //OGDEN101 JOB 1,OGDEN,MSGCLASS=X // EXEC PGM=IFASMFDL,REGION=0M //OUT DD DUMMY //SYSPRINT DD SYSOUT=* //SYSIN DD *  LSNAME(IFASMF.GENERAL,OPTIONS(DUMP))  OUTDD(OUT,TYPE(0:255)) /* //OGDEN102 JOB 1,OGDEN,MSGCLASS=X //SYSPRINT DD SYSOUT=* //SYSIN DD *  DATA TYPE(LOGR) REPORT(NO)  LIST LOGSTREAM NAME(IFASMF.GENERAL) DETAIL(YES) /* Warning! Disabled Wait CPU 0 $  d psw <--you can issue this command PSW for CPU 0 000A0000 00000xxx (24/32 bit mode) PSW FOR cpu 0 00020000 00000000 00000000 00000XXX (64-bit mode)