mirror of
https://github.com/HDFGroup/hdf5.git
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cefabf3224
Purpose, Description, and Solution:
Removed cross-links to Ragged Array doc files (above).
Platforms tested:
IE 5
159 lines
5.6 KiB
HTML
159 lines
5.6 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
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<html>
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<head>
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<title>Performance</title>
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</head>
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<body bgcolor="#FFFFFF">
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<hr>
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<center>
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<table border=0 width=98%>
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<tr><td valign=top align=left>
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<a href="H5.intro.html">Introduction to HDF5</a> <br>
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<a href="RM_H5Front.html">HDF5 Reference Manual</a> <br>
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<a href="index.html">Other HDF5 documents and links</a> <br>
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<!--
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<a href="Glossary.html">Glossary</a><br>
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-->
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</td>
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<td valign=top align=right>
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And in this document, the
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<a href="H5.user.html"><strong>HDF5 User's Guide:</strong></a>
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<br>
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<a href="Files.html">Files</a>
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<a href="Datasets.html">Datasets</a>
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<a href="Datatypes.html">Datatypes</a>
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<a href="Dataspaces.html">Dataspaces</a>
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<a href="Groups.html">Groups</a>
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<br>
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<a href="References.html">References</a>
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<a href="Attributes.html">Attributes</a>
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<a href="Properties.html">Property Lists</a>
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<a href="Errors.html">Error Handling</a>
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<br>
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<a href="Filters.html">Filters</a>
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<a href="Caching.html">Caching</a>
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<a href="Chunking.html">Chunking</a>
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<a href="MountingFiles.html">Mounting Files</a>
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<br>
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Performance
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<a href="Debugging.html">Debugging</a>
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<a href="Environment.html">Environment</a>
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<a href="ddl.html">DDL</a>
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</td></tr>
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</table>
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</center>
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<hr>
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<h1>Performance Analysis and Issues</h1>
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<h2>1. Introduction</h2>
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<p>This section includes brief discussions of performance issues
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in HDF5 and performance analysis tools for HDF5 or pointers to
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such discussions.
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<h2>2. Dataset Chunking</h2>
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Appropriate dataset chunking can make a siginificant difference
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in HDF5 performance. This topic is discussed in
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<a href="Chunking.html">Dataset Chunking Issues</a> elsewhere
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in this <cite>User's Guide</cite>.
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<h2>3. Use of the Pablo Instrumentation of HDF5</h2>
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Pablo HDF5 Trace software provides a means of measuring the
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performance of programs using HDF5.
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<p>The Pablo software consists
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of an instrumented copy of the HDF5 library, the Pablo Trace and
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Trace Extensions libraries, and some utilities for processing the
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output. The instrumented version of the HDF5 library has hooks
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inserted into the HDF5 code which call routines in the Pablo Trace
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library just after entry to each instrumented HDF5 routine and
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just prior to exit from the routine. The Pablo Trace Extension
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library has programs that track the I/O activity between the
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entry and exit of the HDF5 routine during execution.
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<p>A few lines of code must be inserted in the user's main program
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to enable tracing and to specify which HDF5 procedures are to be
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traced. The program is linked with the special HDF5 and Pablo
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libraries to produce an executable. Running this executable on
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a single processor produces an output file called the trace file
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which contains records, called Pablo Self-Defining Data Format
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(SDDF) records, which can later be analyzed using the
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HDF5 Analysis Utilities. The HDF5 Analysis Utilites can be used
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to interpret the SDDF records in the trace files to produce a
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report describing the HDF5 IO activity that occurred during
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execution.
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<p>For further instructions, see the file <code>READ_ME</code>
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in the <code> $(toplevel)/hdf5/pablo/ </code> subdirectory of
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the HDF5 source code distribution.
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<p>For further information about Pablo and the
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Self-Defining Data Format, visit the Pablo website at
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<code><a href="http://www-pablo.cs.uiuc.edu/">http://www-pablo.cs.uiuc.edu/</a></code>.
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<hr>
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<center>
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<table border=0 width=98%>
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<tr><td valign=top align=left>
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<a href="H5.intro.html">Introduction to HDF5</a> <br>
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<a href="RM_H5Front.html">HDF5 Reference Manual</a> <br>
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<a href="index.html">Other HDF5 documents and links</a> <br>
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<!--
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<a href="Glossary.html">Glossary</a><br>
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-->
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</td>
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<td valign=top align=right>
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And in this document, the
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<a href="H5.user.html"><strong>HDF5 User's Guide:</strong></a>
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<br>
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<a href="Files.html">Files</a>
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<a href="Datasets.html">Datasets</a>
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<a href="Datatypes.html">Datatypes</a>
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<a href="Dataspaces.html">Dataspaces</a>
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<a href="Groups.html">Groups</a>
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<br>
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<a href="References.html">References</a>
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<a href="Attributes.html">Attributes</a>
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<a href="Properties.html">Property Lists</a>
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<a href="Errors.html">Error Handling</a>
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<br>
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<a href="Filters.html">Filters</a>
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<a href="Caching.html">Caching</a>
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<a href="Chunking.html">Chunking</a>
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<a href="MountingFiles.html">Mounting Files</a>
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<br>
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Performance
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<a href="Debugging.html">Debugging</a>
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<a href="Environment.html">Environment</a>
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<a href="ddl.html">DDL</a>
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</td></tr>
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</table>
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</center>
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<hr>
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<address>
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<a href="mailto:hdfhelp@ncsa.uiuc.edu">HDF Help Desk</a>
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</address>
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<!-- Created: Thu Oct 14 16:46:00 CDT 1999 -->
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<!-- hhmts start -->
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Last modified: 14 October 1999
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<!-- hhmts end -->
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<br>
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Describes HDF5 Release 1.4 Beta, December 2000
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</body>
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</html>
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