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#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
# description: ftrace - function trace with cpumask
if ! which nproc ; then
nproc() {
ls -d /sys/devices/system/cpu/cpu[0-9]* | wc -l
}
fi
NP=`nproc`
if [ $NP -eq 1 ] ;then
echo "We can not test cpumask on UP environment"
exit_unresolved
fi
if ! grep -q "function" available_tracers ; then
echo "Function trace is not enabled"
exit_unsupported
fi
ORIG_CPUMASK=`cat tracing_cpumask`
do_reset() {
echo $ORIG_CPUMASK > tracing_cpumask
}
echo 0 > tracing_on
echo > trace
: "Bitmask only record on CPU1"
echo 2 > tracing_cpumask
MASK=0x`cat tracing_cpumask`
test `printf "%d" $MASK` -eq 2 || do_reset
echo function > current_tracer
echo 1 > tracing_on
(echo "forked")
echo 0 > tracing_on
: "Check CPU1 events are recorded"
grep -q -e "\[001\]" trace || do_reset
: "There should be No other cpu events"
! grep -qv -e "\[001\]" -e "^#" trace || do_reset
do_reset
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