that you can run zIIP processors in symmetric multithreading mode (SMT). When running in  SMT mode, you can run two threads in parallel on a single zIIP. Check the settings of your  processors with the operator command  D M=CPU.  You can see the output of this command in  Example 2-1 on page 23. The core status tells you, that this LPAR is running in multithreading  (MT) mode 1 for CPs (1 is the only option for CPs), and running in MT mode 2 for zIIPs. D M=CPU IEE174I 09.38.33 DISPLAY M 231 CORE STATUS:  HD=Y MT=2 MT_MODE: CP=1 zIIP=2 ID ST ID RANGE VP ISCM CPU THREAD STATUS 0000 + 0000-0001 H FC00 +N 0001 + 0002-0003 M 0000 +N 0002 + 0004-0005 LP 0000 +N 0003 + 0006-0007 LP 0000 +N 0004 +I 0008-0009 H 0200 ++ 0005 +I 000A-000B H 0200 ++ 0006 +I 000C-000D M 0200 ++ 0007 +I 000E-000F M 0200 ++ 0008 - 0010-0011 0009 - 0012-0013 000A - 0014-0015 000B - 0016-0017 000C -I 0018-0019 000D -I 001A-001B 000E -I 001C-001D 000F -I 001E-001F CPC ND = 008561.T01.IBM.02.00000002B7F8 CPC SI = 8561.716.IBM.02.000000000002B7F8 Model: T01 CPC ID = 00  CPC NAME = ARIES LP NAME = ARIES22 LP ID = 22 CSS ID = 2 MIF ID = 2 + ONLINE - OFFLINE N NOT AVAILABLE / MIXED STATE W WLM-MANAGED I INTEGRATED INFORMATION PROCESSOR (zIIP) CPC ND CENTRAL PROCESSING COMPLEX NODE DESCRIPTOR CPC SI SYSTEM INFORMATION FROM STSI INSTRUCTION CPC ID CENTRAL PROCESSING COMPLEX IDENTIFIER CPC NAME CENTRAL PROCESSING COMPLEX NAME LP NAME LOGICAL PARTITION NAME LP ID LOGICAL PARTITION IDENTIFIER CSS ID CHANNEL SUBSYSTEM IDENTIFIER MIF ID MULTIPLE IMAGE FACILITY IMAGE IDENTIFIER  Example 2-1 Output of D M=CPU operator command For core mode, which is specified in the LOADxx member of SYSn.IPLPARM (see extract  from LOADxx member in Example 2-2 on page 24), the  D M=CPU  operator command is  internally changed to  D M=CORE . If a system is running in core mode, Hiperdispatch is also  required (HIPERDISPATCH=YES in IEAOPTxx parmlib member). 23 Chapter 2. z/OS Container Extensions planning 