Task 387234

Name 06978570_06_0
Workunit 225457
Created 11 Dec 2018, 0:37:40 UTC
Sent 11 Dec 2018, 0:38:41 UTC
Report deadline 11 Dec 2018, 8:38:41 UTC
Received 11 Dec 2018, 1:43:54 UTC
Server state Over
Outcome Success
Client state Done
Exit status 0 (0x00000000)
Computer ID 485
Run time 16 min 34 sec
CPU time 5 min 26 sec
Validate state Valid
Credit 4.77
Device peak FLOPS 1.95 GFLOPS
Application version boinc2docker v1.12 (vbox64_mt)
windows_x86_64
Peak working set size 14.34 MB
Peak swap size 98.69 MB
Peak disk usage 1.09 GB

Stderr output

<core_client_version>7.14.2</core_client_version>
<![CDATA[
<stderr_txt>
2018-12-10 19:59:16 (29296): vboxwrapper (7.9.26200): starting
2018-12-10 19:59:18 (29296): Feature: Checkpoint interval offset (552 seconds)
2018-12-10 19:59:18 (29296): Detected: VirtualBox COM Interface (Version: 5.2.22)
2018-12-10 19:59:19 (29296): Detected: Minimum checkpoint interval (600.000000 seconds)
2018-12-10 19:59:19 (29296): Create VM. (boinc_3922f576059b8d8c, slot#8)
2018-12-10 19:59:19 (29296): Updating drive controller type and model for desired configuration.
2018-12-10 19:59:19 (29296): Setting Memory Size for VM. (3072MB)
2018-12-10 19:59:19 (29296): Setting CPU Count for VM. (1)
2018-12-10 19:59:19 (29296): Setting Chipset Options for VM.
2018-12-10 19:59:19 (29296): Setting Boot Options for VM.
2018-12-10 19:59:19 (29296): Enabling VM Network Access.
2018-12-10 19:59:19 (29296): Setting Network Configuration for NAT.
2018-12-10 19:59:19 (29296): Disabling USB Support for VM.
2018-12-10 19:59:19 (29296): Disabling COM Port Support for VM.
2018-12-10 19:59:19 (29296): Disabling LPT Port Support for VM.
2018-12-10 19:59:19 (29296): Disabling Audio Support for VM.
2018-12-10 19:59:19 (29296): Disabling Clipboard Support for VM.
2018-12-10 19:59:19 (29296): Disabling Drag and Drop Support for VM.
2018-12-10 19:59:19 (29296): Adding storage controller(s) to VM.
2018-12-10 19:59:19 (29296): Adding virtual ISO 9660 disk drive to VM. (vm_isocontext.iso)
2018-12-10 19:59:19 (29296): Adding VirtualBox Guest Additions to VM.
2018-12-10 19:59:19 (29296): Adding network bandwidth throttle group to VM. (Defaulting to 1024GB)
2018-12-10 19:59:19 (29296): Enabling shared directory for VM.
2018-12-10 19:59:19 (29296): Starting VM. (boinc_3922f576059b8d8c, slot#8)
2018-12-10 20:00:04 (29296): Guest Log: BIOS: VirtualBox 5.2.22

2018-12-10 20:00:13 (29296): Guest Log: CPUID EDX: 0x078bfbff

2018-12-10 20:00:13 (29296): Guest Log: BIOS: Boot : bseqnr=1, bootseq=0032

2018-12-10 20:00:13 (29296): Guest Log: int13_harddisk: function 02, unmapped device for ELDL=80

2018-12-10 20:00:13 (29296): Guest Log: BIOS: Boot from Hard Disk 0 failed

2018-12-10 20:00:13 (29296): Guest Log: BIOS: Boot : bseqnr=2, bootseq=0003

2018-12-10 20:00:13 (29296): Guest Log: BIOS: Booting from CD-ROM...

2018-12-10 20:00:13 (29296): Guest Log: BIOS: KBD: unsupported int 16h function 03

2018-12-10 20:00:13 (29296): Guest Log: BIOS: AX=0305 BX=0000 CX=0000 DX=0000 

2018-12-10 20:00:14 (29296): Successfully started VM. (PID = '32188')
2018-12-10 20:00:14 (29296): Reporting VM Process ID to BOINC.
2018-12-10 20:00:26 (29296): Guest Log: net.ipv4.ip_forward = 1

2018-12-10 20:00:26 (29296): Guest Log: sysctl: cannot stat /proc/sys/net/ipv6/conf/all/forwarding: No such file or directory

2018-12-10 20:00:26 (29296): Guest Log: sysctl: setting key "cannot stat %s": No such file or directory

2018-12-10 20:00:26 (29296): Guest Log: sysctl: "cannot stat %s" is an unknown key

2018-12-10 20:00:26 (29296): Guest Log: sysctl: setting key "cannot stat %s": No such file or directory

2018-12-10 20:00:26 (29296): Guest Log: Segmentation fault

2018-12-10 20:00:26 (29296): Guest Log: automount ...

2018-12-10 20:00:26 (29296): Guest Log: Is the disk unpartitioned?, test for the 'boot2docker format-me' string

2018-12-10 20:00:26 (29296): Guest Log: automount over.

2018-12-10 20:00:26 (29296): Guest Log: Setting hostname to boot2docker Done.

2018-12-10 20:00:26 (29296): Guest Log: Mon Dec 10 20:00:09 UTC 2018 dhcp -------------------------------

2018-12-10 20:00:26 (29296): Guest Log: vgdrvHeartbeatInit: Setting up heartbeat to trigger every 2000 milliseconds

2018-12-10 20:00:26 (29296): Guest Log: vboxguest: misc device minor 56, IRQ 20, I/O port d020, MMIO at 00000000f0400000 (size 0x400000)

2018-12-10 20:00:26 (29296): Guest Log: udevadm settle - timeout of 5 seconds reached, the event queue contains:

2018-12-10 20:00:26 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:00/PNP0700:00 (1070)

2018-12-10 20:00:26 (29296): Guest Log:   /sys/devices/LNXSYSTM:00 (1290)

2018-12-10 20:00:26 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXCPU:00 (1291)

2018-12-10 20:00:26 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXPWRBN:00 (1292)

2018-12-10 20:00:26 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXPWRBN:00/input/input0 (1293)

2018-12-10 20:00:26 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXPWRBN:00/input/input0/event0 (1294)

2018-12-10 20:00:26 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSLPBN:00 (1295)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSLPBN:00/input/input1 (1296)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSLPBN:00/input/input1/event1 (1297)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00 (1298)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00 (1299)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/ACPI0003:00 (1300)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/ACPI0003:00/power_supply/AC (1301)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/LNXVIDEO:00 (1302)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/LNXVIDEO:00/device:01 (1303)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/LNXVIDEO:00/input/input6 (1304)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/LNXVIDEO:00/input/input6/event5 (1305)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/PNP0400:00 (1306)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/PNP0400:01 (1307)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/PNP0501:00 (1308)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/PNP0501:01 (1309)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/PNP0501:02 (1310)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/PNP0501:03 (1311)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/PNP0C02:00 (1312)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/PNP0C0A:00 (1313)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/PNP0C0A:00/power_supply/BAT0 (1314)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/PNP8390:00 (1315)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:00 (1316)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:00/APP0001:00 (1317)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:00/PNP0000:00 (1318)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:00/PNP0100:00 (1319)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:00/PNP0103:00 (1320)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:00/PNP0200:00 (1321)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:00/PNP0303:00 (1322)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:00/PNP0700:00 (1323)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:00/PNP0B00:00 (1324)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:00/PNP0F03:00 (1325)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:02 (1326)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0F:00 (1327)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0F:01 (1328)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0F:02 (1329)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0F:03 (1330)

2018-12-10 20:00:27 (29296): Guest Log:   /sys/devices/LNXSYSTM:00/LNXSYBUS:01 (1331)

2018-12-10 20:00:27 (29296): Guest Log: Mon Dec 10 20:00:15 UTC 2018 dhcp -------------------------------

2018-12-10 20:00:27 (29296): Guest Log: VBoxService 5.0.16 r105871 (verbosity: 0) linux.amd64 (Mar  4 2016 17:38:55) release log

2018-12-10 20:00:27 (29296): Guest Log: 00:00:00.000151 main     Log opened 2018-12-10T20:00:16.105404000Z

2018-12-10 20:00:27 (29296): Guest Log: VBoxService 5.0.16 r105871 (verbosity: 0) linux.amd64 (Mar  4 2016 17:38:55) release log

2018-12-10 20:00:27 (29296): Guest Log: 00:00:00.003784 main     OS Product: Linux

2018-12-10 20:00:27 (29296): Guest Log: 00:00:00.004105 main     OS Release: 4.1.19-boot2docker

2018-12-10 20:00:27 (29296): Guest Log: 00:00:00.004203 main     OS Version: #1 SMP Sun Apr 17 19:40:54 UTC 2016

2018-12-10 20:00:27 (29296): Guest Log: 00:00:00.000151 main     Log opened 2018-12-10T20:00:16.105404000Z

2018-12-10 20:00:27 (29296): Guest Log: 00:00:00.014249 main     Executable: /sbin/VBoxService

2018-12-10 20:00:27 (29296): Guest Log: 00:00:00.014254 main     Process ID: 901

2018-12-10 20:00:27 (29296): Guest Log: 00:00:00.014256 main     Package type: LINUX_64BITS_GENERIC

2018-12-10 20:00:27 (29296): Guest Log: 00:00:00.003784 main     OS Product: Linux

2018-12-10 20:00:27 (29296): Guest Log: 00:00:00.004105 main     OS Release: 4.1.19-boot2docker

2018-12-10 20:00:27 (29296): Guest Log: 00:00:00.024624 main     5.0.16 r105871 started. Verbose level = 0

2018-12-10 20:00:27 (29296): Guest Log: 00:00:00.004203 main     OS Version: #1 SMP Sun Apr 17 19:40:54 UTC 2016

2018-12-10 20:00:27 (29296): Guest Log: 00:00:00.014249 main     Executable: /sbin/VBoxService

2018-12-10 20:00:27 (29296): Guest Log: 00:00:00.000:00:00.069570 vminfo   rtldrNativeLoad: dlopen('libdbus-1.so.3', RTLD_NOW | RTLD_LOCAL) failed: libdbus-1.so.3: cannot open shared object file: No such file or directory

2018-12-10 20:00:27 (29296): Guest Log: 00:00:00.069825 vminfo   Error: Unable to connect to system D-Bus (1/3): D-Bus not installed

2018-12-10 20:00:27 (29296): Guest Log: 14254 main     Process ID: 901

2018-12-10 20:00:27 (29296): Guest Log: 00:00:00.014256 main     Package type: LINUX_64BITS_GENERIC

2018-12-10 20:00:27 (29296): Guest Log: 00:00:00.024624 main     5.0.16 r105871 started. Verbose level = 0

2018-12-10 20:00:27 (29296): Guest Log: Mounting BOINC shared/...

2018-12-10 20:00:27 (29296): Guest Log: -------------------

2018-12-10 20:00:27 (29296): Guest Log: Tue Dec 11 01:00:18 UTC 2018

2018-12-10 20:00:27 (29296): VM state change detected. (old = 'poweroff', new = 'running')
2018-12-10 20:00:39 (29296): Guest Log: 00:00:05.129600 vminfo   Error: Unable to connect to system D-Bus (2/3): D-Bus not installed

2018-12-10 20:00:39 (29296): Guest Log: Tue Dec 11 01:00:23 UTC 2018

2018-12-10 20:00:39 (29296): Guest Log: 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default 

2018-12-10 20:00:39 (29296): Guest Log:     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

2018-12-10 20:00:39 (29296): Guest Log:     inet 127.0.0.1/8 scope host lo

2018-12-10 20:00:39 (29296): Guest Log:        valid_lft forever preferred_lft forever

2018-12-10 20:00:39 (29296): Guest Log:     inet6 ::1/128 scope host 

2018-12-10 20:00:39 (29296): Guest Log:        valid_lft forever preferred_lft forever

2018-12-10 20:00:39 (29296): Guest Log: 2: dummy0: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN group default 

2018-12-10 20:00:39 (29296): Guest Log:     link/ether 9a:6e:d4:49:84:6a brd ff:ff:ff:ff:ff:ff

2018-12-10 20:00:39 (29296): Guest Log: 3: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000

2018-12-10 20:00:39 (29296): Guest Log:     link/ether 08:00:27:31:7c:8a brd ff:ff:ff:ff:ff:ff

2018-12-10 20:00:39 (29296): Guest Log:     inet 10.0.2.15/24 brd 10.0.2.255 scope global eth0

2018-12-10 20:00:39 (29296): Guest Log:        valid_lft forever preferred_lft forever

2018-12-10 20:00:42 (29296): Guest Log:     inet6 fe80::a00:27ff:fe31:7c8a/64 scope link 

2018-12-10 20:00:42 (29296): Guest Log:        valid_lft forever preferred_lft forever

2018-12-10 20:00:42 (29296): Guest Log: -------------------

2018-12-10 20:00:42 (29296): Guest Log: Linking /etc/docker to /var/lib/boot2docker for persistence

2018-12-10 20:00:42 (29296): Guest Log: Waiting for Docker daemon to start...

2018-12-10 20:00:42 (29296): Guest Log: REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE

2018-12-10 20:00:42 (29296): Guest Log: Running boinc_app...

2018-12-10 20:00:42 (29296): Guest Log: Importing Docker image from BOINC...

2018-12-10 20:00:42 (29296): Guest Log: Filesystem                Size      Used Available Use% Mounted on

2018-12-10 20:00:42 (29296): Guest Log: tmpfs                     2.6G    164.2M      2.5G   6% /

2018-12-10 20:00:42 (29296): Guest Log: tmpfs                     1.5G         0      1.5G   0% /dev/shm

2018-12-10 20:00:42 (29296): Guest Log: cgroup                    1.5G         0      1.5G   0% /sys/fs/cgroup

2018-12-10 20:00:42 (29296): Guest Log: shared                  117.8G     96.2G     21.6G  82% /root/shared

2018-12-10 20:00:42 (29296): Guest Log: tmpfs                     2.6G    164.2M      2.5G   6% /var/lib/docker/aufs

2018-12-10 20:00:42 (29296): Guest Log: 00:00:10.130300 vminfo   Error: Unable to connect to system D-Bus (3/3): D-Bus not installed

2018-12-10 20:01:07 (29296): Preference change detected
2018-12-10 20:01:11 (29296): Setting CPU throttle for VM. (100%)
2018-12-10 20:01:25 (29296): Setting checkpoint interval to 600 seconds. (Higher value of (Preference: 60 seconds) or (Vbox_job.xml: 600 seconds))
2018-12-10 20:02:32 (29296): Guest Log: doing docker load...

2018-12-10 20:02:44 (29296): VM state change detected. (old = 'running', new = 'paused')
2018-12-10 20:03:11 (29296): VM state change detected. (old = 'paused', new = 'running')
2018-12-10 20:03:29 (29296): Guest Log: Filesystem                Size      Used Available Use% Mounted on

2018-12-10 20:03:29 (29296): Guest Log: tmpfs                     2.6G    663.1M      2.0G  24% /

2018-12-10 20:03:29 (29296): Guest Log: tmpfs                     1.5G         0      1.5G   0% /dev/shm

2018-12-10 20:03:29 (29296): Guest Log: cgroup                    1.5G         0      1.5G   0% /sys/fs/cgroup

2018-12-10 20:03:29 (29296): Guest Log: shared                  117.8G     96.1G     21.7G  82% /root/shared

2018-12-10 20:03:29 (29296): Guest Log: tmpfs                     2.6G    663.1M      2.0G  24% /var/lib/docker/aufs

2018-12-10 20:03:29 (29296): Guest Log:               total        used        free      shared  buff/cache   available

2018-12-10 20:03:29 (29296): Guest Log: Mem:           3007          50        2255         663         701        2255

2018-12-10 20:03:29 (29296): Guest Log: Swap:           702           0         702

2018-12-10 20:03:29 (29296): Guest Log: Building apps directory...

2018-12-10 20:29:58 (29296): Guest Log: Prerun diagnostics...

2018-12-10 20:29:59 (29296): Guest Log: REPOSITORY                    TAG                 IMAGE ID            CREATED             SIZE

2018-12-10 20:29:59 (29296): Guest Log: nanohub_apps_share64_matlab   4                   32c863520615        12 months ago       488.2 MB

2018-12-10 20:29:59 (29296): Guest Log: CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES

2018-12-10 20:29:59 (29296): Guest Log: 499.0M	/var/lib/docker

2018-12-10 20:29:59 (29296): Guest Log:               total        used        free      shared  buff/cache   available

2018-12-10 20:29:59 (29296): Guest Log: Mem:           3007          36        2260         663         711        2268

2018-12-10 20:29:59 (29296): Guest Log: Swap:           702           0         702

2018-12-10 20:29:59 (29296): Guest Log: Filesystem                Size      Used Available Use% Mounted on

2018-12-10 20:29:59 (29296): Guest Log: tmpfs                     2.6G    663.1M      2.0G  24% /

2018-12-10 20:29:59 (29296): Guest Log: tmpfs                     1.5G         0      1.5G   0% /dev/shm

2018-12-10 20:29:59 (29296): Guest Log: cgroup                    1.5G         0      1.5G   0% /sys/fs/cgroup

2018-12-10 20:29:59 (29296): Guest Log: shared                  117.8G     95.7G     22.1G  81% /root/shared

2018-12-10 20:29:59 (29296): Guest Log: tmpfs                     2.6G    663.1M      2.0G  24% /var/lib/docker/aufs

2018-12-10 20:29:59 (29296): Guest Log: Running... 

2018-12-10 20:29:59 (29296): Guest Log: 06978570_06.boinc

2018-12-10 20:29:59 (29296): Guest Log: 06978570_06.sh

2018-12-10 20:32:49 (29296): Guest Log: boinc_app exited (0)

2018-12-10 20:32:49 (29296): Guest Log: Saving results...

2018-12-10 20:32:49 (29296): Guest Log: 06978570_06_output.tar.gz

2018-12-10 20:32:52 (29296): VM Completion File Detected.
2018-12-10 20:32:53 (29296): Powering off VM.
2018-12-10 20:33:14 (29296): Successfully stopped VM.
2018-12-10 20:33:19 (29296): Deregistering VM. (boinc_3922f576059b8d8c, slot#8)
2018-12-10 20:33:19 (29296): Removing virtual disk drive(s) from VM.
2018-12-10 20:33:19 (29296): Removing network bandwidth throttle group from VM.
2018-12-10 20:33:19 (29296): Removing storage controller(s) from VM.
2018-12-10 20:33:20 (29296): Removing VM from VirtualBox.
20:33:35 (29296): called boinc_finish(0)

</stderr_txt>
]]>


©2024 COPYRIGHT 2017-2018 NCN