When configured, STP creates a Coordinated Timing Network (CTN) that is used for  maintaining CPCs in sync with an ETS.  When in DPM mode, a CPC can be configured as a  Single Server CTN . Through STP, time  synchronization information is provided to the operating systems that is running in the  partitions (LPARs) on the CPC.  Operating system support is required for the use of the STP feature. Linux on Z and z/VM  support time synchronization by using STP. STP tip:  STP provides timing information to all partitions in a CPC. If the CPC uses STP,  all active partitions can maintain time synchronization to an external source without  requiring external timing source access (through a network connection).  Moreover, the IBM Z CPC is equipped with Pulse Per Second input to increase time  synchronization accuracy from 100 ms (standard NTP accuracy) to 10 microseconds when  a time source (NTP server) is used that also includes a Pulse Per Second output (PPS). For more information, see the following publications: Important:  Simultaneous Multi-Threading (SMT) is not supported on CPs. As of this  writing, only IFLs support SMT. The following processor characterization types can be configured and used for  customer workload  on a CPC that is managed by using DPM: The following processor types  cannot  be configured when the CPC is managed by using  DPM: GLYPH<SM590000> Server Time Protocol Planning Guide , SG24-7280  GLYPH<SM590000> Server Time Protocol Implementation Guide , SG24-7281  GLYPH<SM590000> Server Time Protocol Recovery Guide , SG24-7380 GLYPH<SM590000> Central Processor (CP) GLYPH<SM590000> Integrated Facility for Linux (IFL) GLYPH<SM590000> IBM Z Integrated Information Processor (zIIP) GLYPH<SM590000> Integrated Coupling Facility (ICF) Processor considerations 16.1.4 Enabling DPM Enabling DPM is a disruptive action. The selection of DPM mode of operation is done by  using a SE task that is named Enable Dynamic Partition Manager under the CPC  Configuration menu, as shown in Figure 16-2 on page 392.  For more information about DPM enabling, see  IBM 3907 Installation Manual,  GC28-6973. Note:  During the machine installation$^{a}$ or in preparation for DPM (later), the IBM SSR  connects the two OSA Express 1000BASE-T cables to the Ethernet Top of Rack  (management) switches in the designated ports.  a. The DPM mode of operation setting is normally performed at machine installation time by the  service support representative (SSR). Chapter 16. Configuring a z14 ZR1 server by using Dynamic Partition Manager  391