petsc-3.9.0 2018-04-07
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Prints a summary of the logging.


#include "petscsys.h"   
PetscErrorCode  PetscLogView(PetscViewer viewer)
Collective over MPI_Comm

Input Parameter

viewer -an ASCII viewer

Options Database Keys

-log_view [:filename] - Prints summary of log information
-log_view - Saves logging information from each process as a Python file
-log_view :filename.xml:ascii_xml - Saves a summary of the logging information in a nested format (see below for how to view it)
-log_all - Saves a file Log.rank for each MPI process with details of each step of the computation
-log_trace [filename] - Displays a trace of what each process is doing


It is possible to control the logging programatically but we recommend using the options database approach whenever possible By default the summary is printed to stdout.

Before calling this routine you must have called either PetscLogDefaultBegin() or PetscLogNestedBegin()

If PETSc is configured with --with-logging=0 then this functionality is not available

To view the nested XML format filename.xml first copy ${PETSC_DIR}/share/petsc/xml/performance_xml2html.xsl to the current directory then open filename.xml with your browser. Specific notes for certain browsers

   Firefox and Internet explorer - simply open the file
   Google Chrome - you must start up Chrome with the option --allow-file-access-from-files
   Safari - see
or one can use the package to translate the xml file to html and then open it with your browser.

The nested XML format was kindly donated by Koos Huijssen and Christiaan M. Klaij MARITIME RESEARCH INSTITUTE NETHERLANDS


log, dump, print

See Also

PetscLogDefaultBegin(), PetscLogDump()




Index of all Profiling routines
Table of Contents for all manual pages
Index of all manual pages