User`s guide

Changes to this Document
Cray XMT™ Programming Environment User's Guide S–2479–20
This rewrite of Cray XMT Programming Environment User's Guide supports the 2.0 release of the Cray XMT
operating system and programming environment. For more information see the release announcement that
accompanies this release.
Added information
• Two new pragmas: #pragma mta max n processors and #pragma mta max
concurrency c. See Compilation Directives on page 109.
• Additional programming examples.
Revised information
• The snapshot documentation has been revised extensively. See Chapter 6, Managing Lustre I/O with the
Snapshot Library on page 67.
• Technical and editorial corrections.
The conceptual content that made up the first chapters of previous versions of this guide have been moved to a
new document, Cray XMT Programming Model.