[opennms-devel] [RFC PATCH] Enable profiling of OpenNMS on start-up

[Alex Bennee]

Hi,

I don't know how developers deal with profiling OpenNMS (the wiki was
bare) but I recently encountered some issues with OpenNMS going into a
deep CPU bound spin. I supply the following patch for comment, I only
chose TIJMP as it's packaged on Ubuntu. If there is a better open
source profiling tool I'm all ears.

>From 6ccb082bfcd9966318b49c645a44ff2489a7da77 Mon Sep 17 00:00:00 2001
From: Alex Bennee <a...@pitcairn.cambridgebroadband.com>
Date: Wed, 16 Sep 2009 14:45:42 +0100
Subject: [PATCH] Add support for the TIJMP profiler to the opennms
startup script

---
 opennms-daemon/src/main/filtered/bin/opennms |   15 +++++++++++++--
 1 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/opennms-daemon/src/main/filtered/bin/opennms
b/opennms-daemon/src/main/filtered/bin/opennms
index 4b1cf7b..2cdc7dd 100755
--- a/opennms-daemon/src/main/filtered/bin/opennms
+++ b/opennms-daemon/src/main/filtered/bin/opennms
@@ -101,7 +101,7 @@ fi
 show_help () {
        cat <<END

-Usage: $0 [-n] [-t] [-c timeout] [-v] [-Q] <command> [<service>]
+Usage: $0 [-n] [-t] [-p] [-c timeout] [-v] [-Q] <command> [<service>]

   command options: start|stop|restart|status|check|pause|resume|kill

@@ -112,6 +112,7 @@ Usage: $0 [-n] [-t] [-c timeout] [-v] [-Q]
<command> [<service>]

       -n  "No execute" mode.  Don't call Java to do anything.
       -t  Test mode.  Enable JPDA on port 8001.
+      -p  Enable TIJMP profiler
       -c  Controller HTTP connection timeout in seconds.
       -v  Verbose mode.  When used with the "status" command, gives the
           results for all OpenNMS services.  When used with "start", enables
@@ -248,6 +249,12 @@ doStart(){
                JPDA="-Xdebug -Xnoagent -Djava.compiler=none
-Xrunjdwp:transport=dt_socket,server=y,address=8001,suspend=n"
        fi

+       # See: http://www.khelekore.org/jmp/tijmp/
+       if [ $PROFILE -gt 0 ]; then
+               echo "- enabling TIJMP Profiling"
+               JPDA="-Dtijmp.jar=/usr/share/java/tijmp-0.6.jar -agentlib:tijmp 
${JPDA}"
+       fi
+

        if [ "$SERVICE" = "" ]; then
                APP_VM_PARMS="$JPDA $MANAGER_OPTIONS"
@@ -485,12 +492,13 @@ if [ x"$ADDITIONAL_CONTROLLER_OPTIONS" != x"" ]; then
 fi

 TEST=0
+PROFILE=0
 NOEXECUTE=""
 VERBOSE=0

 NAME="opennms"

-while getopts c:ntvQ c; do
+while getopts c:ntvpQ c; do
        case $c in
                c)
                        APP_PARMS_CONTROLLER="$APP_PARMS_CONTROLLER -t $OPTARG"
@@ -504,6 +512,9 @@ while getopts c:ntvQ c; do
                t)
                        TEST=1
                        ;;
+               p)
+                       PROFILE=1
+                       ;;
                v)
                        VERBOSE=1
                        VERBOSE_GC=1
-- 
1.6.4.3



-- 
Alex, homepage: http://www.bennee.com/~alex/
http://www.half-llama.co.uk

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