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|
#!/bin/bash
PATH_TO_SCRIPT=`dirname $0`
function find_helper()
{
IN_PATH=`which $1`
REL_TO_PATH="$PATH_TO_SCRIPT/$2"
if [ -z "$IN_PATH" ] && [ ! -z "$PATH_TO_SCRIPT" ] && [ -x "$PATH_TO_SCRIPT/$1" ]
then
echo "$PATH_TO_SCRIPT/$1"
elif [ -z "$IN_PATH" ] && [ ! -z "$PATH_TO_SCRIPT" ] && [ -x "$REL_TO_PATH/$1" ]
then
echo "$REL_TO_PATH/$1"
else
echo "$IN_PATH"
fi
}
function die()
{
echo "[EE] $*"
exit 1
}
[ -z "$FTCAT" ] && FTCAT=`find_helper ftcat ../ft_tools`
[ -z "$FTCAT" ] && die "Can't find 'ftcat' utility."
[ -z "$SHOWSCHED" ] && SHOWSCHED=`find_helper showsched ../liblitmus`
[ -z "$SHOWSCHED" ] && die "Can't find 'showsched' utility."
if [ "$1" == "-s" ]
then
AUTO=1
shift
fi
PIDS=""
# signal that we're done gathering data and clean up
on_finish()
{
echo "Ending Trace..."
kill $PIDS
wait $PIDS
exit 0
}
# register shutdown signal handler
trap 'on_finish' SIGUSR1
CPU_FILES=`ls /dev/litmus/ft_cpu_trace* 2>/dev/null`
MSG_FILES=`ls /dev/litmus/ft_msg_trace* 2>/dev/null`
if [ -z "${CPU_FILES}${MSG_FILES}" ]
then
echo "[EE] Could not find any trace files in /dev/litmus/."
echo " Is this a LITMUS^RT kernel?"
echo " If so, is CONFIG_SCHED_OVERHEAD_TRACE enabled?"
die "No trace files found."
fi
NAME=$1
shift
[ -z "${NAME}" ] && die "No name specified. Run as 'ft-trace-overheads <NAME>'."
SCHED_EVENTS="SCHED2 SCHED CXS TICK RELEASE XCALL SCHED_TIMER QUANTUM_BOUNDARY"
CPU_EVENTS=
for x in $SCHED_EVENTS
do
CPU_EVENTS="$CPU_EVENTS ${x}_END ${x}_START"
done
CPU_EVENTS="$CPU_EVENTS RELEASE_LATENCY TIMER_LATENCY"
IPI_EVENTS="SEND_RESCHED SEND_XCALL"
MSG_EVENTS=
for x in $IPI_EVENTS
do
MSG_EVENTS="$MSG_EVENTS ${x}_END ${x}_START"
done
NAME=${NAME//[ \/]/-}
SCHEDULER=`$SHOWSCHED`
if (( $? != 0 ))
then
SCHEDULER="UNKNOWN"
fi
SCHEDULER=${SCHEDULER//[ \/_]/-}
DIR=`mktemp -d` || die "mktemp failed"
COUNT=0
for dev in $CPU_FILES
do
CPU=`basename ${dev} | sed 's/ft_cpu_trace//'`
TRACE="overheads_host=`hostname`_scheduler=${SCHEDULER}_trace=${NAME}_cpu=${CPU}.bin"
echo "[II] Recording $dev -> $TRACE"
$FTCAT -p "$DIR/cpu$CPU.pid" $dev $CPU_EVENTS > $TRACE &
PIDS="$PIDS $!"
COUNT=$((COUNT + 1))
done
for dev in $MSG_FILES
do
CPU=`basename ${dev} | sed 's/ft_msg_trace//'`
TRACE="overheads_host=`hostname`_scheduler=${SCHEDULER}_trace=${NAME}_msg=${CPU}.bin"
echo "[II] Recording $dev -> $TRACE"
$FTCAT -p "$DIR/msg$CPU.pid" $dev $MSG_EVENTS > $TRACE &
PIDS="$PIDS $!"
COUNT=$((COUNT + 1))
done
READY=`ls $DIR/*.pid 2>/dev/null | wc -l`
while [[ $READY != $COUNT ]]
do
sleep 0.5
READY=`ls $DIR/*.pid 2>/dev/null | wc -l`
done
rm $DIR/*.pid
rmdir $DIR
if [[ $AUTO != 1 ]]
then
echo "Press Enter to end tracing..."
read
on_finish
else
# wait for SIGUSR1 to terminate
echo "Waiting for SIGUSR1 to end tracing..."
wait $PIDS
fi
|
