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<!-- Copyright (C) 2003 Red Hat, Inc.                                -->
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<HTML
><HEAD
><TITLE
>Application profiling</TITLE
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><A
NAME="SERVICES-PROFILE-GPROF"><DIV
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><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
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><DL
><DT
><B
>Table of Contents</B
></DT
><DT
>52. <A
HREF="profile-functions.html"
>Profiling functions</A
></DT
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