上层wakelock 锁获取
adb shell dumpsys power
Looper state:
Looper (PowerManagerService, tid 30) {aabc9c2}
Message 0: { when=+42s654ms what=4 target=com.android.server.power.PowerManagerService$PowerManagerHandler }
Message 1: { when=+9m39s94ms what=1 target=com.android.server.power.PowerManagerService$PowerManagerHandler }
(Total messages: 2, polling=true, quitting=false)
Wake Locks: size=1
PARTIAL_WAKE_LOCK '*alarm*' ACQ=-1s541ms (uid=1000 pid=29334 ws=WorkSource{10033})
Suspend Blockers: size=4
PowerManagerService.WakeLocks: ref count=1
PowerManagerService.Display: ref count=1
PowerManagerService.Broadcasts: ref count=0
PowerManagerService.WirelessChargerDetector: ref count=0
Display Power: state=ON
如何去除上层java wakelock
private void acquireWakeLockInternal(IBinder lock, int flags, String tag, String packageName,
WorkSource ws, String historyTag, int uid, int pid) {
//add this line
if (true) return;
synchronized (mLock) {
if (DEBUG_SPEW) {
Slog.d(TAG, "acquireWakeLockInternal: lock=" + Objects.hashCode(lock)
+ ", flags=0x" + Integer.toHexString(flags)
+ ", tag=\"" + tag + "\", ws=" + ws + ", uid=" + uid + ", pid=" + pid);
}
WakeLock wakeLock;
int index = findWakeLockIndexLocked(lock);
boolean notifyAcquire;
在PowerManagerService.java 函数acquireWakeLockInternal 中添加
if (true) return;
可以去除上层java锁。
如何去除cpp c java wakelock
尝试在system/core suspend 模块去除。
kernel wakelock 锁获取
cat /sys/kernel/debug/wakeup_sources
部分串口调试指令
echo "peripheral" > /sys/devices/platform/soc/4e00000.ssusb/mode //devices模式，不会休眠
echo 1 >/proc/sysrq-trigger //串口等级1
cat /sys/power/system_sleep/stats //查看rpm是否进低功耗模式
cat /d/rpm_master_stats //查看哪个子系统是否休眠
echo 1 > /d/clk/debug_suspend && echo 1 > /sys/module/msm_show_resume_irq/parameters/debug_mask && echo 8 > /proc/sys/kernel/printk //打开时钟调试，中断调试，串口等级最大
echo "host" > /sys/devices/platform/soc/4e00000.ssusb/mode //host模式，会休眠
nohup logcat -v time > /data/local/tmp/logcat.txt & //将logcat日志打到后台
