All,
I am trying to port the Apache daffodil libraries onto an cross
domain guard that runs in a very small form factor.
We have cross compiled OpenJDK 12 for the aarch64 (ARM
processor) and loaded into memory.
I have built the source using sbt (sbt daffodil-cli/stage) and
loaded the necessary jars into memory on the board.
Here are some of the specifics of the hardware platform running
on this guard:
* 2 GB DDR RAM
o Memory Management Unit (MMU) Page Tables used in this system are one-to-one
mapping.
* ARM Cortex A53 4 Core Processor
Here are some the specifics for the software components
* SELinux
* Busybox
Here is some of the performance numbers we are seeing from the performance
testing:
NOTE: These tests were run using the attached csv file and the
attached schema
# ./daffodil performance -s demo/csv.dfdl.xsd -N 100 -t 5 demo/test_file.csv
total parse time (sec): 2.443824
* What does the total parse time value mean ?
* How is it calculated ?
* Is this poor performance?
min rate (files/sec): 1.535568
* What is the min rate (files/sec) What does this mean ?
max rate (files/sec): 29.460340
* What is the max rate (files/sec) What does this mean ?
avg rate (files/sec): 40.919485
* What is the avg rate (files/sec) What does this mean ?
* Do you have any suggestions how to improve parse/unparsed speed on an
ARM processor?
* Any suggestions are greatly appreciated!
# ./daffodil performance -s demo/csv.dfdl.xsd -N 200 -t 5 demo/test_file.csv
total parse time (sec): 3.175893
min rate (files/sec): 1.520884
max rate (files/sec): 107.223428
avg rate (files/sec): 62.974409
# ./daffodil performance -s demo/csv.dfdl.xsd -N 300 -t 5 demo/test_file.csv
total parse time (sec): 3.656587
min rate (files/sec): 1.551273
max rate (files/sec): 180.155186
avg rate (files/sec): 82.043712
# ./daffodil performance -s demo/csv.dfdl.xsd -N 1000 -t 5 demo/test_file.csv
total parse time (sec): 5.602554
min rate (files/sec): 1.459977
max rate (files/sec): 301.144046
avg rate (files/sec): 178.490026
Sincerely,
Rob Rose
Sr. Principal Software Engineer
General Dynamics Mission Systems
Office: 508-880-1866
Cell: 508-341-5216
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<?xml version="1.0" encoding="UTF-8"?>
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<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"; xmlns:fn="http://www.w3.org/2005/xpath-functions";
xmlns:dfdl="http://www.ogf.org/dfdl/dfdl-1.0/"; xmlns:ex="http://example.com";
targetNamespace="http://example.com"; elementFormDefault="unqualified">
<xs:include schemaLocation="org/apache/daffodil/xsd/DFDLGeneralFormat.dfdl.xsd" />
<xs:annotation>
<xs:appinfo source="http://www.ogf.org/dfdl/";>
<dfdl:format ref="ex:GeneralFormatPortable" separator="" initiator=""
terminator="" textTrimKind="none" initiatedContent="no" ignoreCase="no"
separatorPosition="infix" occursCountKind="implicit"
emptyValueDelimiterPolicy="both" representation="text" textNumberRep="standard"
lengthKind="delimited" encoding="ASCII" encodingErrorPolicy="error" />
</xs:appinfo>
</xs:annotation>
<xs:element name="file">
<xs:complexType>
<xs:sequence dfdl:separator="%NL;" dfdl:separatorPosition="postfix">
<xs:element name="header" minOccurs="0" maxOccurs="1"
dfdl:occursCountKind="implicit">
<xs:complexType>
<xs:sequence dfdl:separator=",">
<xs:element name="title" type="xs:string" maxOccurs="unbounded" />
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="record" maxOccurs="unbounded">
<xs:complexType>
<xs:sequence dfdl:separator=",">
<xs:element name="item" type="xs:string" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
