GLYPH<SM590000> New IOCP Keyword MIXTYPE required for prior FICON$^{3}$ cards 

GLYPH<SM590000> New hardware (announced with Driver 36) 

GLYPH<SM590000> IOCP support for Dynamic I/O for standalone CF (Driver 36) 

IOCP required level for z14 servers:  The required level of IOCP for the z14 is IOCP 5.4.0 with PTFs. For more information, see the following publications: 

GLYPH<SM590000> IBM Z Stand-Alone Input/Output Configuration Program User's Guide , SB10-7166 

GLYPH<SM590000> IBM Z Input/Output Configuration Program User’s Guide for ICP IOCP , SB10-7163 

Dynamic Partition Manager V3.2:  At the time of this writing, the Dynamic Partition Manager V3.2 is available for managing IBM Z servers that are running Linux. DPM 3.2 is available with HMC Driver Level 36. IOCP does not need to configure a server that is running in DPM mode. For more information, see IBM Dynamic Partition Manager (DPM) Guide , SB10-7170-02. 

## 7.4.2 Base CPC features and functions 

In this section, we describe the features and functions of Base CPC. 

## HiperDispatch 

The HIPERDISPATCH=YES/NO  parameter in the IEAOPTxx member of SYS1.PARMLIB and on the SET OPT=xx  command controls whether HiperDispatch is enabled or disabled for a z/OS image. It can be changed dynamically, without an IPL or any outage. 

The default is that HiperDispatch is disabled on all releases, from z/OS V1R10 (which requires PTFs for zIIP support) through z/OS V1R12. 

Beginning with z/OS V1R13, the IEAOPTxx keyword HIPERDISPATCH  defaults to YES when it is running on a z14, z13, z13s, zEC12, or zBC12 server. If HIPERDISPATCH=NO  is specified, the specification is accepted as it was on previous z/OS releases. 

The use of SMT on z14 servers requires that HiperDispatch is enabled on the operating system. For more information, see “Simultaneous multithreading” on page 268. 

Additionally, with z/OS V1R12 or later, any LPAR that is running with more than 64 logical processors is required to operate in HiperDispatch Management Mode. 

The following rules control this environment: 

GLYPH<SM590000> If an LPAR is defined at IPL with more than 64 logical processors, the LPAR automatically operates in HiperDispatch Management Mode, regardless of the HIPERDISPATCH= specification. 

GLYPH<SM590000> If logical processors are added to an LPAR that has 64 or fewer logical processors and the extra logical processors raise the number of logical processors to more than 64, the LPAR automatically operates in HiperDispatch Management Mode, regardless of the HIPERDISPATCH=YES/NO  specification. That is, even if the LPAR has the HIPERDISPATCH=NO specification, that LPAR is converted to operate in HiperDispatch Management Mode. 

GLYPH<SM590000> An LPAR with more than 64 logical processors that are running in HiperDispatch Management Mode cannot be reverted to run in non-HiperDispatch Management Mode. 

