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AC68U Core 1 or 2 goes 100% after a couple weeks

Discussion in 'Asuswrt-Merlin' started by HiVolt, Jan 17, 2017.

  1. john9527

    john9527 Part of the Furniture

    Joined:
    Mar 28, 2014
    Messages:
    4,875
    Location:
    United States
    The jffs partition is used by the router to save some persistent data (sort of like nvram for other large data). It keeps your certs if you use OpenVPN or HTTPS, a copy of the syslog, data related to the clients which have connected (clientlist data), etc.

    You can also customize some of the router functions with user written scripts and configs (see the wiki for more info). If you haven't written any of those, it's OK that the 'custom scripts and configs' option is No.
     
  2. HiVolt

    HiVolt Occasional Visitor

    Joined:
    Jan 9, 2014
    Messages:
    11
    I see, thanks... I might try this on a light day here at work... maybe on a weekend.

    Would having my bandwidth usage tracking to set to NVRAM - 1 per day, be an issue? But I only enabled that in April, and I've had the 100% core issue since getting the router in December, so I would think not.
     
  3. john9527

    john9527 Part of the Furniture

    Joined:
    Mar 28, 2014
    Messages:
    4,875
    Location:
    United States
    Hmm....speculating again. The NVRAM is a rather small space (64K). It could be that there is a bug if the NVRAM gets full and it tries to free up some NVRAM space to save the stats.

    I'd recommend you change the save location to 'Custom location' and in the field to specify the location enter /jffs/ and check the radio button to 'Reset or Create data files', then hit the Apply button.
     
  4. Fangs404

    Fangs404 New Around Here

    Joined:
    Dec 8, 2017
    Messages:
    1
    Just wanted to jump in here that I'm also experiencing this same issue. My top output looks similar:

    Code:
    Mem: 73828K used, 181880K free, 1100K shrd, 1332K buff, 7760K cached
    CPU0:  0.9% usr  0.5% sys  0.0% nic 92.4% idle  0.0% io  0.0% irq  5.9% sirq
    CPU1:  0.0% usr  1.3% sys  0.0% nic  0.0% idle 97.2% io  0.0% irq  1.3% sirq
    Load average: 4.00 4.02 4.05 1/89 30922
      PID  PPID USER     STAT   VSZ %VSZ CPU %CPU COMMAND
      469     1 admin    R     1256  0.4   1  0.5 protect_srv
    30876 30870 admin    R     1448  0.5   1  0.2 top
      491     1 admin    S     6656  2.6   0  0.1 httpd -i br0
      496     1 admin    S    10148  3.9   1  0.0 watchdog
        1     0 admin    S     6232  2.4   1  0.0 /sbin/preinit
      897     1 admin    S     6220  2.4   0  0.0 bwdpi_wred_alive
      468     1 admin    S     6220  2.4   0  0.0 /sbin/wanduck
      518     1 admin    S     6220  2.4   0  0.0 erp_monitor
      819     1 admin    S     6220  2.4   1  0.0 ntp
      842     1 admin    S     6220  2.4   0  0.0 disk_monitor
      511     1 admin    S     6220  2.4   0  0.0 hour_monitor
      747     1 admin    S     6220  2.4   1  0.0 usbled
      479     1 admin    S     6220  2.4   0  0.0 wpsaide
      500   496 admin    S     6220  2.4   0  0.0 ots
      510     1 admin    S     6220  2.4   1  0.0 bwdpi_check
      374     1 admin    S     6212  2.4   1  0.0 console
     5202  5201 admin    D     5200  2.0   0  0.0 bwdpi_sqlite -e -s NULL
      911   907 admin    S     4152  1.6   1  0.0 data_colld -i 1800 -p 43200 -b -w /tmp/bwdpi/dc/
      926   907 admin    S     4152  1.6   0  0.0 data_colld -i 1800 -p 43200 -b -w /tmp/bwdpi/dc/
      906     1 admin    S     4152  1.6   1  0.0 data_colld -i 1800 -p 43200 -b -w /tmp/bwdpi/dc/
      909   907 admin    S     4152  1.6   1  0.0 data_colld -i 1800 -p 43200 -b -w /tmp/bwdpi/dc/
      907   906 admin    S     4152  1.6   1  0.0 data_colld -i 1800 -p 43200 -b -w /tmp/bwdpi/dc/
      910   907 admin    S     4152  1.6   0  0.0 data_colld -i 1800 -p 43200 -b -w /tmp/bwdpi/dc/
      908   907 admin    S     4152  1.6   0  0.0 data_colld -i 1800 -p 43200 -b -w /tmp/bwdpi/dc/
      860   859 admin    S     2724  1.0   0  0.0 wred -B
      859   856 admin    S     2724  1.0   0  0.0 wred -B
      856     1 admin    S     2724  1.0   1  0.0 wred -B
      867   859 admin    S     2724  1.0   1  0.0 wred -B
      868   859 admin    S     2724  1.0   1  0.0 wred -B
      862   859 admin    S     2724  1.0   1  0.0 wred -B
      865   859 admin    S     2724  1.0   1  0.0 wred -B
      866   859 admin    S     2724  1.0   1  0.0 wred -B
      869   859 admin    S     2724  1.0   1  0.0 wred -B
      863   859 admin    S     2724  1.0   1  0.0 wred -B
      864   859 admin    S     2724  1.0   1  0.0 wred -B
      490     1 admin    S     2428  0.9   1  0.0 avahi-daemon: running [RT-AC68U-AC88.local]
      501     1 admin    S     2292  0.9   1  0.0 rstats
      751   748 admin    S     2200  0.8   1  0.0 u2ec
      748     1 admin    S     2200  0.8   1  0.0 u2ec
      752   751 admin    S     2200  0.8   0  0.0 u2ec
      481     1 admin    S     1752  0.6   1  0.0 nas
      508     1 admin    S     1584  0.6   0  0.0 networkmap --bootwait
    16898     1 admin    S     1452  0.5   0  0.0 /sbin/udhcpc -i eth0 -p /var/run/udhcpc0.pid -s /tmp/udhcpc -O33 -O249
    30870 30869 admin    S     1448  0.5   1  0.0 -sh
      376   374 admin    S     1444  0.5   1  0.0 /bin/sh
    16478   496 admin    D     1444  0.5   1  0.0 cp /tmp/syslog.log /tmp/syslog.log-1 /jffs
      493     1 admin    S     1440  0.5   1  0.0 crond
      391     1 admin    S     1440  0.5   0  0.0 /sbin/klogd -c 5
     5201   511 admin    S     1440  0.5   0  0.0 sh -c bwdpi_sqlite -e -s NULL
      389     1 admin    S     1436  0.5   0  0.0 /sbin/syslogd -m 0 -S -O /tmp/syslog.log -s 256 -l 7
      485     1 nobody   S     1396  0.5   1  0.0 dnsmasq --log-async
      482     1 admin    S     1384  0.5   0  0.0 /usr/sbin/acsd
      475   469 admin    S     1256  0.4   1  0.0 protect_srv
      476   475 admin    S     1256  0.4   1  0.0 protect_srv
      749     1 admin    S     1236  0.4   1  0.0 lpd br0
      505     1 admin    S     1208  0.4   0  0.0 lld2d br0
      477     1 admin    S     1192  0.4   1  0.0 /bin/eapd
      494     1 admin    S     1164  0.4   0  0.0 /usr/sbin/infosvr br0
    30869   472 admin    S     1136  0.4   0  0.0 dropbear -p 192.168.1.1:22 -s -j -k
      472     1 admin    S     1104  0.4   0  0.0 dropbear -p 192.168.1.1:22 -s -j -k
    17155     1 admin    S      912  0.3   0  0.0 miniupnpd -f /etc/upnp/config
    16990     1 admin    S      756  0.3   0  0.0 odhcp6c -df -R -s /tmp/dhcp6c -N try -c 000300017824af7dac88 -FP 0:dac88 -r82 -r83 eth0
      294     1 admin    S      664  0.2   1  0.0 hotplug2 --persistent --no-coldplug
      255     2 admin    SW       0  0.0   0  0.0 [mtdblock3]
        3     2 admin    SW       0  0.0   0  0.0 [ksoftirqd/0]
      385     2 admin    DWN      0  0.0   1  0.0 [jffs2_gcd_mtd4]
        7     2 admin    SW       0  0.0   1  0.0 [migration/1]
        6     2 admin    SW       0  0.0   0  0.0 [migration/0]
        9     2 admin    SW       0  0.0   1  0.0 [ksoftirqd/1]
      282     2 admin    SW       0  0.0   1  0.0 [kworker/1:1]
    16759     2 admin    SW       0  0.0   0  0.0 [kworker/0:2]
       57     2 admin    DW       0  0.0   1  0.0 [sync_supers]
        5     2 admin    SW       0  0.0   1  0.0 [kworker/u:0]
    
    I've got similar settings as the OP (HiVolt) for the JFSS partition.

    A software reboot does not solve this problem. The only thing that solves it for me is to use the power button on the back of the router. Like the OP, this happens pretty regularly once the router has a moderate amount of uptime. Right now, I'm sitting at 12 days of uptime, but I'm not sure when the CPU pegged because I've been gone on travel recently.
     

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