一、功耗字段意义：
App processor wakeup:Netd基于xt_idletimer 待机下监视网络设备的收发工作状态，即当设备发生联网从休眠态变成为唤醒态时，会记录打醒者的uid(uid大于0)和网络类型(wifi或数据类型)、时间戳
实际日志：我们在BugReport主要也是在设备待机休眠中，alarm+联网心跳的应用会触发AppProcessorWakeup事件。即只要能在设备休眠时，发生网络事件使系统的休眠状态被打破，就会被Netd标记上报给battery stats. 除了待机的长链接心跳联网包外，微信给灭屏待机的手机发消息或三方push联网也会触发该事件
二、相关源码
2.1 代码流程图
2.2 联网事件
xt_idletimer 的 uevent 消息与 IdlertimerController 有关，主要用来监视网络设备的收发工作状态。当对应设备工作或空闲时间超过设置的监控时间后【wifi网络默认15秒，数据网络默认15秒超时监测】， Kernel将会发送携带其状态(idle或active)的UEvent消息。
android/qssi/system/netd/server/NetlinkHandler.cpp
void NetlinkHandler::onEvent(NetlinkEvent *evt) { const char *subsys = evt->getSubsystem(); if (!subsys) { ALOGW("No subsystem found in netlink event"); return; } //处理对应 NETLINK_KOBJECT_UEVENT和 NETLINK_ROUTE 的消息 if (!strcmp(subsys, "net")) { int action = evt->getAction(); const char *iface = evt->findParam("INTERFACE");//查找消息中携带的网络设备名 if (action == evt->NlActionAdd) { notifyInterfaceAdded(iface); //添加NIC(Network Interface Card)的消息 } else if (action == evt->NlActionRemove) { notifyInterfaceRemoved(iface); //NIC被移除的消息 } else if (action == evt->NlActionChange) { evt->dump(); notifyInterfaceChanged("nana", true); //NIC变化消息 } else if (action == evt->NlActionLinkUp) { //下面两个消息来自 NETLINK_ROUTE notifyInterfaceLinkChanged(iface, true); //链路启用(类此插网线) } else if (action == evt->NlActionLinkDown) { notifyInterfaceLinkChanged(iface, false); //链路断开(类似拔网线) } else if (action == evt->NlActionAddressUpdated || action == evt->NlActionAddressRemoved) { const char *address = evt->findParam("ADDRESS"); const char *flags = evt->findParam("FLAGS"); const char *scope = evt->findParam("SCOPE"); if (action == evt->NlActionAddressRemoved && iface && address) { int resetMask = strchr(address, ':') ? RESET_IPV6_ADDRESSES : RESET_IPV4_ADDRESSES; resetMask |= RESET_IGNORE_INTERFACE_ADDRESS; if (int ret = ifc_reset_connections(iface, resetMask)) { ALOGE("ifc_reset_connections failed on iface %s for address %s (%s)", iface, address, strerror(ret)); } } if (iface && flags && scope) { notifyAddressChanged(action, address, iface, flags, scope); } } else if (action == evt->NlActionRdnss) { const char *lifetime = evt->findParam("LIFETIME"); const char *servers = evt->findParam("SERVERS"); if (lifetime && servers) { notifyInterfaceDnsServers(iface, lifetime, servers); } } else if (action == evt->NlActionRouteUpdated || action == evt->NlActionRouteRemoved) { const char *route = evt->findParam("ROUTE"); const char *gateway = evt->findParam("GATEWAY"); const char *iface = evt->findParam("INTERFACE"); if (route && (gateway || iface)) { notifyRouteChange(action, route, gateway, iface); } } } else if (!strcmp(subsys, "qlog")) { //对应 NETLINK_NFLOG const char *alertName = evt->findParam("ALERT_NAME"); const char *iface = evt->findParam("INTERFACE"); notifyQuotaLimitReached(alertName, iface); //当数据量超过预警值，则会收到该通知 //idletimer:用于跟踪某个 NIC[网络接口]的工作状态，即idle或active，检测时间按秒计算 } else if (!strcmp(subsys, "xt_idletimer")) { const char *label = evt->findParam("INTERFACE"); const char *state = evt->findParam("STATE"); const char *timestamp = evt->findParam("TIME_NS"); if (state) notifyInterfaceClassActivity(label, !strcmp("active", state), timestamp); #if !LOG_NDEBUG } else if (strcmp(subsys, "platform") && strcmp(subsys, "backlight")) { /* It is not a VSYNC or a backlight event */ ALOGV("unexpected event from subsystem %s", subsys);#endif }}2.3 BatteryStats统计
AppProcessorWakeup特征：联网时，存在休眠态-> 唤醒态时才统计
void NetlinkHandler::onEvent(NetlinkEvent *evt) { const char *subsys = evt->getSubsystem(); if (!subsys) { ALOGW("No subsystem found in netlink event"); return; } //处理对应 NETLINK_KOBJECT_UEVENT和 NETLINK_ROUTE 的消息 if (!strcmp(subsys, "net")) { int action = evt->getAction(); const char *iface = evt->findParam("INTERFACE");//查找消息中携带的网络设备名 if (action == evt->NlActionAdd) { notifyInterfaceAdded(iface); //添加NIC(Network Interface Card)的消息 } else if (action == evt->NlActionRemove) { notifyInterfaceRemoved(iface); //NIC被移除的消息 } else if (action == evt->NlActionChange) { evt->dump(); notifyInterfaceChanged("nana", true); //NIC变化消息 } else if (action == evt->NlActionLinkUp) { //下面两个消息来自 NETLINK_ROUTE notifyInterfaceLinkChanged(iface, true); //链路启用(类此插网线) } else if (action == evt->NlActionLinkDown) { notifyInterfaceLinkChanged(iface, false); //链路断开(类似拔网线) } else if (action == evt->NlActionAddressUpdated || action == evt->NlActionAddressRemoved) { const char *address = evt->findParam("ADDRESS"); const char *flags = evt->findParam("FLAGS"); const char *scope = evt->findParam("SCOPE"); if (action == evt->NlActionAddressRemoved && iface && address) { int resetMask = strchr(address, ':') ? RESET_IPV6_ADDRESSES : RESET_IPV4_ADDRESSES; resetMask |= RESET_IGNORE_INTERFACE_ADDRESS; if (int ret = ifc_reset_connections(iface, resetMask)) { ALOGE("ifc_reset_connections failed on iface %s for address %s (%s)", iface, address, strerror(ret)); } } if (iface && flags && scope) { notifyAddressChanged(action, address, iface, flags, scope); } } else if (action == evt->NlActionRdnss) { const char *lifetime = evt->findParam("LIFETIME"); const char *servers = evt->findParam("SERVERS"); if (lifetime && servers) { notifyInterfaceDnsServers(iface, lifetime, servers); } } else if (action == evt->NlActionRouteUpdated || action == evt->NlActionRouteRemoved) { const char *route = evt->findParam("ROUTE"); const char *gateway = evt->findParam("GATEWAY"); const char *iface = evt->findParam("INTERFACE"); if (route && (gateway || iface)) { notifyRouteChange(action, route, gateway, iface); } } } else if (!strcmp(subsys, "qlog")) { //对应 NETLINK_NFLOG const char *alertName = evt->findParam("ALERT_NAME"); const char *iface = evt->findParam("INTERFACE"); notifyQuotaLimitReached(alertName, iface); //当数据量超过预警值，则会收到该通知 //idletimer:用于跟踪某个 NIC[网络接口]的工作状态，即idle或active，检测时间按秒计算 } else if (!strcmp(subsys, "xt_idletimer")) { const char *label = evt->findParam("INTERFACE"); const char *state = evt->findParam("STATE"); const char *timestamp = evt->findParam("TIME_NS"); if (state) notifyInterfaceClassActivity(label, !strcmp("active", state), timestamp); #if !LOG_NDEBUG } else if (strcmp(subsys, "platform") && strcmp(subsys, "backlight")) { /* It is not a VSYNC or a backlight event */ ALOGV("unexpected event from subsystem %s", subsys);#endif }}三、相关日志
四、文档参考
Android系统中iptables的应用（五）IdlertimerController_idletimer iptables-CSDN博客 Android系统中iptables的应用（五）IdlertimerController