* ThreadSpotter far surpasses simply collecting raw performance data – instead, it identifies, classifies and instructs the developer in ways to remove specific issues. * ThreadSpotter offers a solid, detailed understanding of performance problems to allow a quick resolution on the system under examination. It also models other execution environments and provides performance optimization guidance for other systems. * ThreadSpotter models thread communication and interaction effects, giving advice on how to resolve the resulting performance issues.

* SRB Mode Debugging - As IBM creates more and more SRB-only System Interfaces, the ability to debug them interactively becomes more and more valuable. * Cross Memory Mode Debugging - z/XDC has extensive capabilities for debugging code with the Primary, Secondary and Home address spaces all being the same, or different in any conceivable way. * Simple Control Block Maps - z/XDC provides DSECT maps for thousands of IBM control blocks. Creating DSECT maps for your own control blocks is trivially easy. * Source Listing Support - z/XDC automatically loads source image maps (from ADATA), making your code in storage as easy to read as an assembly listing. * Comprehensive Mapping - z/XDC uses ADATA, SYM data and/or ESD data (whatever's available, whatever's necessary) for creating Linkedit/Binder maps, CSECT maps, and DSECT maps to help you visualize your code, data and control blocks.