日志被限流，关闭限流也不生效，导致日志丢失？

Question

hdc shell hilog -Q domainoff
hdc shell hilog -Q pidoff
hdc shell hilog -G 2M

使用以上命令关闭限流后，依然是限流状态。

报错截图：

正常情况下应打印0-100。

Answer 1

根因是底层日志socket通信丢失，将以下内容保存为hilogd.cfg文件：

{
  "jobs": [
    {
      "name": "init",
      "cmds": [
        "mkdir /data/log/ 0775 system log",
        "mkdir /data/log/dict/ 0755 logd log",
        "mkdir /data/log/hilog/ 0755 logd log",
        "start hilogd"
      ]
    },
    {
      "name": "services:hilogd",
      "cmds": [
        "write /proc/sys/net/unix/max_dgram_qlen 600"
      ]
    }
  ],
  "services": [
    {
      "name": "hilogd",
      "path": [
        "/system/bin/hilogd"
      ],
      "disabled": 1,
      "uid": "logd",
      "gid": [
        "log",
        "system",
        "readproc",
        "shell"
      ],
      "sandbox": 0,
      "file": [
        "/dev/kmsg rd 0640 root root"
      ],
      "socket": [
        {
          "name": "hilogInput",
          "family": "AF_UNIX",
          "type": "SOCK_DGRAM",
          "protocol": "default",
          "permissions": "0222",
          "uid": "logd",
          "gid": "log",
          "option": [
            "SOCKET_OPTION_PASSCRED"
          ]
        },
        {
          "name": "hilogOutput",
          "family": "AF_UNIX",
          "type": "SOCK_SEQPACKET",
          "protocol": "default",
          "permissions": "0666",
          "uid": "logd",
          "gid": "log",
          "option": [
            "SOCKET_OPTION_PASSCRED"
          ]
        },
        {
          "name": "hilogControl",
          "family": "AF_UNIX",
          "type": "SOCK_SEQPACKET",
          "protocol": "default",
          "permissions": "0660",
          "uid": "logd",
          "gid": "log",
          "option": [
          ]
        }
      ],
      "start-mode": "condition",
      "secon": "u:r:hilogd:s0"
    }
  ]
}

再执行以下命令将其推入手机重启：

hdc shell "mount -o remount,rw /"
hdc file send hilogd.cfg /system/etc/init/
hdc shell reboot

打印日志频率过快还是会丢失。使用以下命令来减少日志打印：

关闭所有日志
hdc shell hilog -b X
打开debug级别的你的tag的日志
hdc shell hilog -b D -T 你的tag(见下方截图)
关闭限流、调整缓存
hdc shell hilog -Q domainoff
hdc shell hilog -Q pidoff
hdc shell  hilog -G 2M