GLYPH<SM590000> Streamlined system-managed duplexing protocol, which avoids costly latching deadlocks  that can occur between primary and secondary structure. GLYPH<SM590000> “Functionally specialized” ICF processors that operate for CF images with dedicated  processors defined under certain conditions that realizes the following benefits: – One “functionally specialized” processor for inspecting suspended commands  – The remaining processors are non-specialized for general CF request processing – Avoids many inter-processor contentions that were associated with CF dispatching – One “functionally specialized” proc essor for pulling in new commands  3.5.5 IBM Z Integrated Information Processor How zIIPs work A zIIP$^{4}$ reduces the standard processor (CP) capacity requirements for z/OS Java, XML  system services applications, and a portion of work of z/OS Communications Server and Db2  UDB for z/OS Version 8 or later, freeing up capacity for other workload requirements.  A zIIP enables eligible z/OS workloads to have a portion of them directed to zIIP. The zIIPs do  not increase the MSU value of the processor and so do not affect the IBM software license  changes. z14 is the second generation of IBM Z processors to support SMT. z14 servers implement two  threads per core on IFLs and zIIPs. SMT must be enabled at the LPAR level and supported by  the z/OS operating system. SMT was enhanced for z14 and it is enabled for SAPs by default  (no customer intervention required). zIIPs are designed for supporting designated z/OS workloads. One of the workloads is Java  code execution. When Java code must be run (for example, under control of IBM  WebSphere), the z/OS JVM calls the function of the zIIP. The z/OS dispatcher then suspends  the JVM task on the CP that it is running on and dispatches it on an available zIIP. After the  Java application code execution is finished, z/OS redispatches the JVM task on an available  CP. After this process occurs, normal processing is resumed. This process reduces the CP time that is needed to run Java WebSphere applications, which  frees that capacity for other workloads. 4 IBM z Systemsfi Application Assi st Processors (zAAPs) are not available on z14 servers. A zAAP workload is  dispatched to available zIIPs (zAAP on zIIP capability). 114  IBM z14 (3906) Technical Guide