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#!/bin/bash
#
# PM-QA validation test suite for the power management on Linux
#
# Copyright (C) 2011, Linaro Limited.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# Contributors:
# Daniel Lezcano <daniel.lezcano@linaro.org> (IBM Corporation)
# - initial API and implementation
#
# URL : https://wiki.linaro.org/WorkingGroups/PowerManagement/Doc/QA/Scripts#cpuhotplug_04
CPUBURN=../utils/cpuburn
source ../include/functions.sh
check_task_migrate() {
local cpu=$1
local cpuid=${cpu:3}
local cpumask=$((1 << cpuid))
local dirpath=$CPU_PATH/$1
local pid=
local ret=
if [ "$cpu" == "cpu0" ]; then
return 0
fi
taskset -c 0x$cpumask $CPUBURN $cpu &
pid=$!
sleep 1 # let taskset to do setaffinity before checking
ret=$(taskset -p $pid | cut -d ':' -f 2)
ret=$(echo $ret) # remove trailing whitespace
ret=$(printf "%d" 0x$ret)
check "affinity is set" "test $cpumask -eq $ret"
sleep 1
set_offline $cpu
ret=$?
check "offlining a cpu with affinity succeed" "test $ret -eq 0"
ret=$(taskset -p $pid | cut -d ':' -f 2)
ret=$(echo $ret)
ret=$(printf "%d" 0x$ret)
check "affinity changed" "test $cpumask -ne $ret"
kill $pid
# in any case we set the cpu online in case of the test fails
set_online $cpu
return 0
}
for_each_cpu check_task_migrate
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