| 286 |
\end{python} |
\end{python} |
| 287 |
It possible to rerun the mechanism that was originally used to generates |
It possible to rerun the mechanism that was originally used to generates |
| 288 |
\var{mydomain} to recreate \var{mydomain}. However in most cases using \var{dump} and |
\var{mydomain} to recreate \var{mydomain}. However in most cases using \var{dump} and |
| 289 |
load is faster in particuar if optimization has been applied. In case that |
load is faster in particular if optimization has been applied. In case that |
| 290 |
\escript is running on more than one \MPI processor the \var{dump} will create an individual file for each processor containing the local data. In order to avoid conflicts the file name is extended by the \MPI processor rank. |
\escript is running on more than one \MPI processor the \var{dump} will create an individual file for each processor containing the local data. In order to avoid conflicts the file name is extended by the \MPI processor rank. |
| 291 |
|
|
| 292 |
The function space of the \Data is stored in {\tt x.nc}, though. |
The function space of the \Data is stored in {\tt x.nc}, though. |
| 1347 |
|
|
| 1348 |
|
|
| 1349 |
\section{Utilities} |
\section{Utilities} |
| 1350 |
|
|
| 1351 |
|
The \class{FileWriter} provides a mechanism to write data to a file. |
| 1352 |
|
In essence, this class wraps the standard \class{file} class to write data |
| 1353 |
|
that are global in MPI to a file. In fact, data are written on the processor |
| 1354 |
|
with \MPI rank 0 only. It is recommended to use \class{FileWriter} |
| 1355 |
|
rather than \class{open} in order to write code that is running |
| 1356 |
|
with and without \MPI. It is save to use \class{open} under MPI to read data which are global under \MPI. |
| 1357 |
|
|
| 1358 |
|
\begin{classdesc}{FileWriter}{fn\optional{,append=\False, \optional{createLocalFiles=\False}})} |
| 1359 |
|
Opens a file of name \var{fn} for writing. If \var{append} is set to \True |
| 1360 |
|
written data are append at the end of the file. |
| 1361 |
|
If running under \MPI only the first processor with rank==0 |
| 1362 |
|
will open the file and write to it. |
| 1363 |
|
If \var{createLocalFiles} is set each individual processor will create a file |
| 1364 |
|
where for any processor with rank>0 the file name is extended by its rank. This option is normally used for debug purposes only. |
| 1365 |
|
\end{classdesc} |
| 1366 |
|
|
| 1367 |
|
The following methods are available: |
| 1368 |
|
\begin{methoddesc}[FileWriter]{close}{} |
| 1369 |
|
closes the file. |
| 1370 |
|
\end{methoddesc} |
| 1371 |
|
\begin{methoddesc}[FileWriter]{flush}{} |
| 1372 |
|
flushes the internal buffer to disk. |
| 1373 |
|
\end{methoddesc} |
| 1374 |
|
\begin{methoddesc}[FileWriter]{write}{txt} |
| 1375 |
|
Write string \var{txt} to file. |
| 1376 |
|
Note that newline is not added. |
| 1377 |
|
\end{methoddesc} |
| 1378 |
|
\begin{methoddesc}[FileWriter]{writelines}{txts} |
| 1379 |
|
Write the list \var{txts} of strings to the file.. |
| 1380 |
|
Note that newlines are not added. |
| 1381 |
|
This method is equivalent to call write() for each string. |
| 1382 |
|
\end{methoddesc} |
| 1383 |
|
\begin{memberdesc}[FileWriter]{closed} |
| 1384 |
|
\True if file is closed. |
| 1385 |
|
\end{memberdesc} |
| 1386 |
|
\begin{memberdesc}[FileWriter]{mode} |
| 1387 |
|
access mode. |
| 1388 |
|
\end{memberdesc} |
| 1389 |
|
\begin{memberdesc}[FileWriter]{name} |
| 1390 |
|
file name. |
| 1391 |
|
\end{memberdesc} |
| 1392 |
|
\begin{memberdesc}[FileWriter]{newlines} |
| 1393 |
|
line separator |
| 1394 |
|
\end{memberdesc} |
| 1395 |
|
|
| 1396 |
|
|
| 1397 |
\begin{funcdesc}{setEscriptParamInt}{name,value} |
\begin{funcdesc}{setEscriptParamInt}{name,value} |
| 1398 |
assigns the integer value \var{value} to the parameter \var{name}. |
assigns the integer value \var{value} to the parameter \var{name}. |
| 1399 |
If \var{name}="TOO_MANY_LINES" conversion of any \Data object to a string switches to a |
If \var{name}="TOO_MANY_LINES" conversion of any \Data object to a string switches to a |
| 1410 |
|
|
| 1411 |
\begin{funcdesc}{getMPISizeWorld}{} |
\begin{funcdesc}{getMPISizeWorld}{} |
| 1412 |
returns the number of \MPI processors in use in the \env{MPI_COMM_WORLD} processor group. |
returns the number of \MPI processors in use in the \env{MPI_COMM_WORLD} processor group. |
| 1413 |
If \MPI is not used 1 is returend. |
If \MPI is not used 1 is returned. |
| 1414 |
\end{funcdesc} |
\end{funcdesc} |
| 1415 |
\begin{funcdesc}{getMPIRankWorld}{} |
\begin{funcdesc}{getMPIRankWorld}{} |
| 1416 |
returns the rank of the process within the \env{MPI_COMM_WORLD} processor group. |
returns the rank of the process within the \env{MPI_COMM_WORLD} processor group. |
| 1417 |
If \MPI is not used 0 is returend. |
If \MPI is not used 0 is returned. |
| 1418 |
\end{funcdesc} |
\end{funcdesc} |
| 1419 |
\begin{funcdesc}{MPIBarrierWorld}{} |
\begin{funcdesc}{MPIBarrierWorld}{} |
| 1420 |
performs a barrier synchronization across all processors within \env{MPI_COMM_WORLD} |
performs a barrier synchronization across all processors within \env{MPI_COMM_WORLD} |
| 1421 |
processor group. |
processor group. |
| 1422 |
\end{funcdesc} |
\end{funcdesc} |
| 1423 |
\begin{funcdesc}{getMPIWorldMax}{a} |
\begin{funcdesc}{getMPIWorldMax}{a} |
| 1424 |
returns the maximum value of the interger \var{a} across all |
returns the maximum value of the integer \var{a} across all |
| 1425 |
processors within \env{MPI_COMM_WORLD}. |
processors within \env{MPI_COMM_WORLD}. |
| 1426 |
\end{funcdesc} |
\end{funcdesc} |
| 1427 |
|
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