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<!-- Copyright (C) 2003 Red Hat, Inc. --> <!-- This material may be distributed only subject to the terms --> <!-- and conditions set forth in the Open Publication License, v1.0 --> <!-- or later (the latest version is presently available at --> <!-- http://www.opencontent.org/openpub/). --> <!-- Distribution of the work or derivative of the work in any --> <!-- standard (paper) book form is prohibited unless prior --> <!-- permission is obtained from the copyright holder. --> <HTML ><HEAD ><TITLE >Performance Test</TITLE ><meta name="MSSmartTagsPreventParsing" content="TRUE"> <META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ "><LINK REL="HOME" TITLE="eCos Reference Manual" HREF="ecos-ref.html"><LINK REL="UP" TITLE="Tests and Demonstrations" HREF="net-common-tests-and-demonstrations.html"><LINK REL="PREVIOUS" TITLE="Standalone Tests" HREF="net-common-standalone-tests.html"><LINK REL="NEXT" TITLE="Interactive Tests" HREF="net-common-interactive-tests.html"></HEAD ><BODY CLASS="SECT1" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >eCos Reference Manual</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="net-common-standalone-tests.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" >Chapter 36. Tests and Demonstrations</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="net-common-interactive-tests.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="NET-COMMON-PERFORMANCE-TEST">Performance Test</H1 ><TABLE BORDER="5" BGCOLOR="#E0E0F0" WIDTH="70%" ><TR ><TD ><PRE CLASS="PROGRAMLISTING" ><SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >tcp_echo</I ></SPAN > - data forwarding program for performance test</PRE ></TD ></TR ></TABLE ><P ><B CLASS="COMMAND" >tcp_echo</B > is one part of the standard performance test we use. The other parts are host programs <TT CLASS="LITERAL" >tcp_source</TT > and <TT CLASS="LITERAL" >tcp_sink</TT >. To make these (under LINUX) cd to the tests source directory in the eCos repository and type “<TT CLASS="LITERAL" >make -f make.linux</TT >” - this should build <TT CLASS="LITERAL" >tcp_source</TT > and <TT CLASS="LITERAL" >tcp_sink</TT >.</P ><P >The LINUX program “<TT CLASS="LITERAL" >tcp_source</TT >” sends data to the target. On the target, “<TT CLASS="LITERAL" >tcp_echo</TT >” sends it onwards to “<TT CLASS="LITERAL" >tcp_sink</TT >” running on LINUX. So the target must receive and send on all the data that <TT CLASS="LITERAL" >tcp_source</TT > sends it; the time taken for this is measured and the data rate is calculated.</P ><P >To invoke the test, first start <TT CLASS="LITERAL" >tcp_echo</TT > on the target board and wait for it to become quiescent - it will report work to calibrate a CPU load which can be used to simulate real operating conditions for the stack.</P ><P >Then on your LINUX machine, in one terminal window, invoke <TT CLASS="LITERAL" >tcp_sink</TT > giving it the IP address (or hostname) of one interface of the target board. For example “<TT CLASS="LITERAL" >tcp_sink 10.130.39.66</TT >”. <TT CLASS="LITERAL" >tcp_echo</TT > on the target will print something like “<TT CLASS="LITERAL" >SINK connection from 10.130.39.13:1143</TT >” when <TT CLASS="LITERAL" >tcp_sink</TT > is correctly invoked.</P ><P >Next, in another LINUX terminal window, invoke <TT CLASS="LITERAL" >tcp_source</TT >, giving it the IP address (or hostname) of an interface of the target board, and optionally a background load to apply to the target while the test runs. For example, “<TT CLASS="LITERAL" >tcp_source 194.130.39.66</TT >” to run the test with no additional target CPU load, or “<TT CLASS="LITERAL" >tcp_source 194.130.39.66 85</TT >” to load it up to 85% used. The target load must be a multiple of 5. <TT CLASS="LITERAL" >tcp_echo</TT > on the target will print something like “<TT CLASS="LITERAL" >SOURCE connection from 194.130.39.13:1144</TT >” when tcp_source is correctly invoked.</P ><P >You can connect tcp_sink to one target interface and tcp_source to another, or both to the same interface. Similarly, you can run <TT CLASS="LITERAL" >tcp_sink</TT > and <TT CLASS="LITERAL" >tcp_source</TT > on the same LINUX machine or different ones. TCP/IP and ARP look after them finding one another, as intended.</P ><TABLE BORDER="5" BGCOLOR="#E0E0F0" WIDTH="70%" ><TR ><TD ><PRE CLASS="PROGRAMLISTING" ><SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >nc_test_master</I ></SPAN > - network characterization master <SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >nc_test_slave</I ></SPAN > - network characterization slave</PRE ></TD ></TR ></TABLE ><P >These tests talk to each other to measure network performance. They can each run on either a test target or a LINUX host computer given some customization to your local environment. As provided, <TT CLASS="LITERAL" >nc_test_slave</TT > must run on the test target, and <TT CLASS="LITERAL" >nc_test_master</TT > must be run on a LINUX host, and be given the test target's IP address or hostname.</P ><P >The tests print network performance for various packet sizes over UDP and TCP, versus various additional CPU loads on the target.</P ><P >The programs <TABLE BORDER="5" BGCOLOR="#E0E0F0" WIDTH="70%" ><TR ><TD ><PRE CLASS="PROGRAMLISTING" ><SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >nc6_test_slave</I ></SPAN > <SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >nc6_test_master</I ></SPAN ></PRE ></TD ></TR ></TABLE > are additional forms which support both IPv4 and IPv6 addressing.</P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="net-common-standalone-tests.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ecos-ref.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="net-common-interactive-tests.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Standalone Tests</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="net-common-tests-and-demonstrations.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Interactive Tests</TD ></TR ></TABLE ></DIV ></BODY ></HTML >
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