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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 >Application profiling</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="PREVIOUS" TITLE="CPU Load Measurements" HREF="cpuload-functions.html"><LINK REL="NEXT" TITLE="Profiling functions" HREF="profile-functions.html"></HEAD ><BODY CLASS="PART" 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="cpuload-functions.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="profile-functions.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="PART" ><A NAME="SERVICES-PROFILE-GPROF"><DIV CLASS="TITLEPAGE" ><H1 CLASS="TITLE" >XX. Application profiling</H1 ><DIV CLASS="PARTINTRO" ><A NAME="AEN15538"><P >The profile_gprof package provides a mechanism to measure the runtime performance of an application. This is done by gathering an execution histogram.</P ><P >When profiling is started on the target device, a <TT CLASS="FUNCTION" >TFTP</TT > server will be started which exports the single file <TT CLASS="FILENAME" >PROFILE.DAT</TT > This analysis data can then be fetched by connecting to the target with a <TT CLASS="FUNCTION" >TFTP</TT > client program and then be processed by the <TT CLASS="FUNCTION" >gprof</TT > utility program. <DIV CLASS="NOTE" ><BLOCKQUOTE CLASS="NOTE" ><P ><B >NOTE: </B >Be sure and specify binary mode transfers for this data file, which may not be the default with on some <TT CLASS="FUNCTION" >TFTP</TT > client programs.</P ></BLOCKQUOTE ></DIV > <DIV CLASS="NOTE" ><BLOCKQUOTE CLASS="NOTE" ><P ><B >NOTE: </B >The port used for this <TT CLASS="FUNCTION" >TFTP</TT > server is configurable. The default will be the IETF standard port of 69/UDP, but it may be changed to any UDP port via the <TT CLASS="LITERAL" >CYGNUM_PROFILE_TFTP_PORT</TT > CDL option.</P ></BLOCKQUOTE ></DIV ></P ></DIV ><DIV CLASS="TOC" ><DL ><DT ><B >Table of Contents</B ></DT ><DT >52. <A HREF="profile-functions.html" >Profiling functions</A ></DT ></DL ></DIV ></DIV ></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="cpuload-functions.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="profile-functions.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >CPU Load Measurements</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" > </TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Profiling functions</TD ></TR ></TABLE ></DIV ></BODY ></HTML >