[petsc-dev] Nested event logging and human friendly output

[Matthew Knepley]

On Mon, Sep 14, 2015 at 7:45 AM, Koos Huijssen <koos.huijssen at vortech.nl>
wrote:

> Dear PETSc development team,
>
> We have developed an extension of the PETSc event logging facilities that
> has the following advanced features:
>
> - It allows logging of events in the form of a nested tree. So if some
> function is called from multiple locations in the code, these instances are
> distinguished. This in contrast with the standard event logger, which only
> logs the amount of total call time.
>

How is this different from using stages?


> - It allows the output report to be formatted in XML format. This output
> can then be viewed in a human-friendly form in a web browser
>  with the use of the XSL Transformation script performance_xml2html.xsl.
> The html features an nested timings tree that can be expanded and collapsed
> as desired.
>

This sounds fine and useful. We will look at the code.

  Thanks,

     Matt


> This tool has been very useful for us to analyze the code and pinpoint
> performance bottle necks. We think that it can be useful for others as
> well, and therefore we are providing the code here for integration in the
> open source distribution of PETSc.
>
> For more information I refer to the included manual. We have also provided
> a test program and a makefile for convenience. The test program can be run
> using MPI with for instance 3-6 processes.
>
> I apologize for not using the git repo to submit the developed code. I
> also apologize for not adhering to the PETSc coding standards (or at least
> not as far as I know), but I hope that it is not too far off.. Apart from
> the whole capital/underscore standardization stuff one issue may require
> special attention, namely the (ab)use of the format PETSc_VIEWER_ASCII_IMPL
> for signaling the XML format in XMLViewer.c. I couldn't find an already
> existing and better fitting format, but it could be necessary to add a new
> format here for this purpose.
>
> Can you take it up from here and realize the integration of the code in
> the PETSc distribution?
>
> With kind regards,
>
> Koos Huijssen
>
> --
> ____________________________________________________________________
>
> VORtech BV - Scientific software engineers
> ____________________________________________________________________
>
> Dr.ir. Koos Huijssen
>
> P.O. Box 260
> 2600 AG Delft
> The Netherlands
>
> phone  +31(0)15-285 0125
> mobile +31(0)6-3333 0803
> email koos.huijssen at vortech.nl
> web   www.vortech.nl
> ____________________________________________________________________
>
>


-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener
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