add a userspace tracing example

using lttng-ust, perf and tshark

traces can be shown in tracecompass

Signed-off-by: Manuel Traut <manut@linutronix.de>

1 files changed, 62 insertions, 0 deletions

diff --git a/application-devel/tracing/lttng-c/trace.sh b/application-devel/tracing/lttng-c/trace.sh
new file mode 100755
index 0000000..5a52bee
--- /dev/null
+++ b/application-devel/tracing/lttng-c/trace.sh
@@ -0,0 +1,62 @@
+#!/bin/bash
+
+USERID=`id -u`
+TSTAMP=`date +%Y%m%d-%H%M%S`
+UDIR=$HOME
+CURDIR=`pwd`
+
+PERF_VERSION="$(uname -r)"
+PERF_VERSION="${PERF_VERSION%%-*}"
+case "$PERF_VERSION" in
+    *.*.*)
+  PERF_VERSION="${PERF_VERSION%.*}"
+  ;;
+esac
+
+
+sudo modprobe usbmon
+
+tshark -F pcap -i eth0 -w ~/lttng-traces/network-$TSTAMP.pcap &
+#sudo and -F pcap is not working atm sudo is needed for usbmon
+#sudo tshark -F pcap -i usbmon0 -w ~/lttng-traces/usb-$TSTAMP.pcap &
+
+lttng create lttng-ust
+lttng list --userspace
+lttng enable-event --userspace hello_world:my_first_tracepoint
+lttng start
+
+mkdir -p uprobe-traces
+cd uprobe-traces
+sudo perf probe -x $CURDIR/hellolttngust MYEVENT=$CURDIR/hellolttngust.c:8
+sudo perf probe -x $CURDIR/hellolttngust EVNAME=$CURDIR/hellolttngust.c:35
+sudo perf record -e probe_hellolttngust:MYEVENT -e probe_hellolttngust:EVNAME &
+cd -
+
+mkdir -p kernel-traces
+cd kernel-traces
+sudo perf record -e sched:sched_switch &
+cd -
+
+./hellolttngust huhu haha hihi
+
+sudo killall perf_$PERF_VERSION
+killall tshark
+#sudo killall tshark
+
+lttng stop
+lttng destroy
+
+echo wait for writing perf data
+wait
+
+cd uprobe-traces
+sudo perf data convert --to-ctf=$UDIR/lttng-traces/perf-uprobes-$TSTAMP
+sudo perf probe -d probe_hellolttngust:MYEVENT
+sudo perf probe -d probe_hellolttngust:EVNAME
+cd -
+
+cd kernel-traces
+sudo perf data convert --to-ctf=$UDIR/lttng-traces/perf-kernel-$TSTAMP
+cd -
+
+sudo chown -R $USERID $UDIR/lttng-traces/*