全志平台方案CPU频率切频稳定性测试

最近用全志的方案做CPU频率切频稳定性测试，就是不停地切换频率，测试CPU跑在每个频率上时候的稳定性，测试的设计思路如下：（以R331为例）

   1.先把cpu频率调到1200M，跑memtester 10M 1000, 300秒后kill掉

   2.将频率调到1104M,跑30秒memtester,然后再往下调一档，继续跑30秒memtester,依此类推
   3.每档都跑30秒，直到最低档60M时跑300秒
   4.CPU频率从60M开始，一档档往上升，每档跑30秒memtester,逆着降频时候的流程跑。
   5.重复1.

   cpu的频率点：1.2G   1.104G  1.008G  912M  816M   720M  648M   600M  504M   480M    408M    312M  240M   120M  60M

调频策略选的是userspace，就是用户想跑多少就跑多少：

echo userspace > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

全志的频率一般是写死几个等级，在只能在几个等级之间切换，比如R331就是上面的:

1.2G   1.104G  1.008G  912M  816M   720M  648M   600M  504M   480M    408M    312M  240M   120M  60M

这些参数是经过全志芯片测试的，为什么这些数值不知道，好像和倍频有关。

附测试脚本（一项项暴力写死循环）：

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# Put your custom commands here that should be executed once
# the system init finished. By default this file does nothing.
test_count=0
test_count_total=99999
sleep_time_long=300
sleep_time_short=30

#set CPU modle to userspace,set MAX frep to 1200M,set MIN frep to 60M
echo userspace > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
echo 1200000 > /sys/devices/system/cpu/cpu0/cpufrep/scaling_max_freq
echo 60000 > /sys/devices/system/cpu/cpu0/cpufrep/scaling_min_freq

while [ ${test_count} -le  ${test_count_total} ]
do
	#test times
	let test_count+=1
	echo "test count: "${test_count}
	
	#set CPU freq 1200M
	echo 1200000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
	echo -e "\nSET CPU FREQ :"
	cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
	memtester 10M 1000  > test.log &
	sleep ${sleep_time_long}
	killall memtester
	
	#set CPU freq 1008M
	echo 1008000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
	echo -e "\nSET CPU FREQ :"
	cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
	memtester 10M 1000 > test.log &
	sleep ${sleep_time_short}
	killall memtester

	#set CPU freq 816M
	echo 816000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
	echo -e "\nSET CPU FREQ :"
	cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
	memtester 10M 1000 > test.log &
	sleep ${sleep_time_short}
	killall memtester

	#set CPU freq 648M
	echo 648000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
	echo -e "\nSET CPU FREQ :"
	cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
	memtester 10M 1000 > test.log &
	sleep ${sleep_time_short}
	killall memtester

	#set CPU freq 480
	echo 480000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
	echo -e "\nSET CPU FREQ :"
	cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
	memtester 10M 1000 > test.log &
	sleep ${sleep_time_short}
	killall memtester

	#set CPU freq 408M
	echo 408000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
	echo -e "\nSET CPU FREQ :"
	cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
	memtester 10M 1000 > test.log &
	sleep ${sleep_time_short}
	killall memtester

	#set CPU freq 312M
	echo 312000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
	echo -e "\nSET CPU FREQ :"
	cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
	memtester 10M 1000 > test.log &
	sleep ${sleep_time_short}
	killall memtester

	#set CPU freq 240M
	echo 240000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
	echo -e "\nSET CPU FREQ :"
	cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
	memtester 10M 1000 > test.log &
	sleep ${sleep_time_short}
	killall memtester

	#set CPU freq 120M
	echo 120000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
	echo -e "\nSET CPU FREQ :"
	cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
	memtester 10M 1000 > test.log &
	sleep ${sleep_time_short}
	killall memtester

	#set CPU freq 60M
	echo 60000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
	echo -e "\nSET CPU FREQ :"
	cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
	memtester 10M 1000 > test.log &
	sleep ${sleep_time_long}
	killall memtester

	#set CPU freq 120M
	echo 120000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
	echo -e "\nSET CPU FREQ :"
	cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
	memtester 10M 1000 > test.log &
	sleep ${sleep_time_short}
	killall memtester

	#set CPU freq 240M
	echo 240000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
	echo -e "\nSET CPU FREQ :"
	cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
	memtester 10M 1000 > test.log &
	sleep ${sleep_time_short}
	killall memtester

	#set CPU freq 312M
	echo 312000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
	echo -e "\nSET CPU FREQ :"
	cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
	memtester 10M 1000 > test.log &
	sleep ${sleep_time_short}
	killall memtester

	#set CPU freq 408M
	echo 408000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
	echo -e "\nSET CPU FREQ :"
	cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
	memtester 10M 1000 > test.log &
	sleep ${sleep_time_short}
	killall memtester

	#set CPU freq 480M
	echo 480000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
	echo -e "\nSET CPU FREQ :"
	cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
	memtester 10M 1000 > test.log &
	sleep ${sleep_time_short}
	killall memtester

	#set CPU freq 648M
	echo 648000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
	echo -e "\nSET CPU FREQ :"
	cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
	memtester 10M 1000 > test.log &
	sleep ${sleep_time_short}
	killall memtester

	#set CPU freq 816M
	echo 816000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
	echo -e "\nSET CPU FREQ :"
	cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
	memtester 10M 1000 > test.log &
	sleep ${sleep_time_short}
	killall memtester

	#set CPU freq 1008M
	echo 1008000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
	echo -e "\nSET CPU FREQ :"
	cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
	memtester 10M 1000 > test.log &
	sleep ${sleep_time_short}
	killall memtester
done
	echo "test_count: " ${test_count}

exit 0