| 4 |
both the core numerics and the pluggable packages operate. The description |
both the core numerics and the pluggable packages operate. The description |
| 5 |
presented here is intended to be a detailed exposition and contains significant |
presented here is intended to be a detailed exposition and contains significant |
| 6 |
background material, as well as advanced details on working with the WRAPPER. |
background material, as well as advanced details on working with the WRAPPER. |
| 7 |
The tutorial sections of this manual (see Chapters |
The tutorial sections of this manual (see sections |
| 8 |
\ref{chap:tutorialI}, \ref{chap:tutorialII} and \ref{chap:tutorialIII}) |
\ref{sect:tutorials} and \ref{sect:tutorialIII}) |
| 9 |
contain more succinct, step-by-step instructions on running basic numerical |
contain more succinct, step-by-step instructions on running basic numerical |
| 10 |
experiments, of varous types, both sequentially and in parallel. For many |
experiments, of varous types, both sequentially and in parallel. For many |
| 11 |
projects simply starting from an example code and adapting it to suit a |
projects simply starting from an example code and adapting it to suit a |
| 97 |
\resizebox{!}{4.5in}{\includegraphics{part4/fit_in_wrapper.eps}} |
\resizebox{!}{4.5in}{\includegraphics{part4/fit_in_wrapper.eps}} |
| 98 |
\end{center} |
\end{center} |
| 99 |
\caption{ |
\caption{ |
| 100 |
Numerical code is written too fit within a software support |
Numerical code is written to fit within a software support |
| 101 |
infrastructure called WRAPPER. The WRAPPER is portable and |
infrastructure called WRAPPER. The WRAPPER is portable and |
| 102 |
can be specialized for a wide range of specific target hardware and |
can be specialized for a wide range of specific target hardware and |
| 103 |
programming environments, without impacting numerical code that fits |
programming environments, without impacting numerical code that fits |
| 120 |
(UMA) and non-uniform memory access (NUMA) designs. Significant work has also |
(UMA) and non-uniform memory access (NUMA) designs. Significant work has also |
| 121 |
been undertaken on x86 cluster systems, Alpha processor based clustered SMP |
been undertaken on x86 cluster systems, Alpha processor based clustered SMP |
| 122 |
systems, and on cache-coherent NUMA (CC-NUMA) systems from Silicon Graphics. |
systems, and on cache-coherent NUMA (CC-NUMA) systems from Silicon Graphics. |
| 123 |
The MITgcm code, operating within the WRAPPER, is also used routinely used on |
The MITgcm code, operating within the WRAPPER, is also routinely used on |
| 124 |
large scale MPP systems (for example T3E systems and IBM SP systems). In all |
large scale MPP systems (for example T3E systems and IBM SP systems). In all |
| 125 |
cases numerical code, operating within the WRAPPER, performs and scales very |
cases numerical code, operating within the WRAPPER, performs and scales very |
| 126 |
competitively with equivalent numerical code that has been modified to contain |
competitively with equivalent numerical code that has been modified to contain |
| 781 |
forty grid points in y. The two sub-domains in each process will be computed |
forty grid points in y. The two sub-domains in each process will be computed |
| 782 |
sequentially if they are given to a single thread within a single process. |
sequentially if they are given to a single thread within a single process. |
| 783 |
Alternatively if the code is invoked with multiple threads per process |
Alternatively if the code is invoked with multiple threads per process |
| 784 |
the two domains in y may be computed on concurrently. |
the two domains in y may be computed concurrently. |
| 785 |
\item |
\item |
| 786 |
\begin{verbatim} |
\begin{verbatim} |
| 787 |
PARAMETER ( |
PARAMETER ( |
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