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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 "Error: $*"
exit 1
}
[ -z "$FTCAT" ] && FTCAT=`find_helper ftcat ../ft_tools`
[ -z "$FTCAT" ] && die "Can't find 'ftcat' utility."
[ -z "$FTDEV" ] && FTDEV=/dev/litmus/sched_trace
[ -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 $PIDS
exit 0
}
# register shutdown signal handler
trap 'on_finish' SIGUSR1
SCHEDULER=`$SHOWSCHED`
if (( $? != 0 ))
then
SCHEDULER="UNKNOWN"
fi
SCHEDULER=${SCHEDULER//[ \/_]/-}
# Setup up sched_trace tracing.
# works for sparc64 and Intel x86 if all CPUs are online
NUM_CPUS=`egrep -c '^processor|online' /proc/cpuinfo`
# Trace ID Key:
# 501 - sched_trace_task_name
# 502 - sched_trace_task_param
# 503 - sched_trace_task_release
# 504 - sched_trace_task_switch_to
# 505 - sched_trace_task_switch_away
# 506 - sched_trace_task_completion
# 507 - sched_trace_task_block
# 508 - sched_trace_task_resume
# 509 - sched_trace_action
# 510 - sched_trace_sys_release
# 511 - sched_trace_last_suspension_as_completion
ST_IDS="501 502 503 504 505 506 507 508 509 510 511"
DIR=`mktemp -d` || die "mktemp failed"
TAG=$1
PIDS=""
COUNT=0
for x in `seq 0 $(($NUM_CPUS - 1))`
do
TARGET="schedule_host=`hostname`_scheduler=${SCHEDULER}_trace=${TAG}_cpu=${x}.bin"
echo -n "CPU $x: "
$FTCAT -p "$DIR/cpu${x}.pid" "$FTDEV$x" $ST_IDS > "$TARGET" &
PIDS="$PIDS $!"
echo $! "> $TARGET [$?]"
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
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