Core consistently @ 100% and [Core load in SSH does match System Status]

[Zhenya]

Hi All,
2 issues, i'm on _5 and things are working fairly well - definitely faster than my wrt54g ( and much more flexible) but significantly less stable.

My 2 issues are related. An earlier post of mine brought up that my core was pegged @ 100%. The fix was to turn off DLNA, which helped! However, I still get 100% peg just not ALWAYS, but almost always.

When I ssh in and run top i see that the core is not @ 100% as stated by the giu. Can you guys help spot the problem?

Mem: 203904K used, 35768K free, 0K shrd, 65284K buff, 100616K cached
CPU: 36.7% usr 26.3% sys  0.0% nic  0.0% idle  0.0% io  3.5% irq 33.3% sirq
Load average: 2.24 2.20 1.93 4/65 16106
  PID  PPID USER     STAT   VSZ %VSZ CPU %CPU COMMAND
 1056     1 foouser D     4624  1.9   0 11.8 ./asus_lighttpd -Df /opt/etc/asus_
  438     1 foouser R     4144  1.7   0  1.3 httpd
13774 13667 foouser R     1440  0.6   0  0.4 top
  160     1 foouser S     1428  0.5   0  0.4 syslogd -m 0 -S -O /tmp/syslog.log
    5     2 foouser SW<      0  0.0   0  0.4 [khelper]
19071  8731 foouser S     6500  2.7   0  0.0 /usr/sbin/smbd -D -s /etc/smb.conf
 8731     1 foouser S     6032  2.5   0  0.0 /usr/sbin/smbd -D -s /etc/smb.conf
15039  8731 foouser S     6032  2.5   0  0.0 /usr/sbin/smbd -D -s /etc/smb.conf
 8729     1 foouser S     5860  2.4   0  0.0 nmbd -D -s /etc/smb.conf
 8730  8729 foouser S     5800  2.4   0  0.0 nmbd -D -s /etc/smb.conf
 8550     1 foouser S     4624  1.9   0  0.0 ./asus_lighttpd -Df /opt/etc/asus_
    1     0 foouser S     4504  1.8   0  0.0 /sbin/init noinitrd
  462     1 foouser S     4496  1.8   0  0.0 watchdog
  353     1 foouser S     4496  1.8   0  0.0 /sbin/wanduck
  619     1 foouser S     4496  1.8   0  0.0 disk_monitor
  365     1 foouser S     4496  1.8   0  0.0 wpsaide
  609     1 foouser S     4496  1.8   0  0.0 ntp
  507     1 foouser S     4496  1.8   0  0.0 usbled
  468   462 foouser S     4496  1.8   0  0.0 ots
  152     1 foouser S     4488  1.8   0  0.0 console

 

[L&LD]

What router? Have you reset to factory defaults and then manually enter only the required settings to secure the router and get you connected to your ISP?

 

[Zhenya]

Thanks for the reply.

This is a N66R. I bought it turned it on, played with a few things, then installed Merlin.

Should I really factory reset it?!

 

[L&LD]

Yes, I would. Depending on which firmware it was shipped with. But it seems like it does need it.

 

[Zhenya]

Thanks. 2 Questions:

1) What led you to this conclusion?
2) What is the most effective way to reset this router?

 

[L&LD]

1) Your indication that it is unstable was my first sign.

2) From the GUI, go to the firmware tabs and chose reset to factory defaults.

 

[john9527]

When I ssh in and run top i see that the core is not @ 100% as stated by the giu.

Just to help you close out the other part of of your question.

Unfortunately, top doesn't give you a total, just the pieces....so

CPU: 36.7% usr 26.3% sys 0.0% nic 0.0% idle 0.0% io 3.5% irq 33.3% sirq

is really
36.7% usr
26.3% sys
0.0% nic
0.0% idle
0.0% io
3.5% irq
33.3% sirq

add 'em up and you get 99.8%

 

[Zhenya]

Guys, thanks for the replies.

I reset the router and redid all the settings - I'm still pegged @ 100%.

Is it possible that the 1.5 TB drive is somehow really taxing the router?

I'm concerned that 1) I will have a hardware failure if I continue to run this router @100% 2) that I am not experiencing an optimal network due to the CPU load

 

[Zhenya]

All,
I am now on the newest release .50 . Same problem continues. I have a 1.5tb drive attached through USB. I have noticed that if I unplug it my cpu demand drastically falls. Is there something I can do to optimize my drive ot help the router mount it without all this incredible cpu load?

Thanks,
Zhenya

 

[Nullity]

Disable all unneeded features.

It seems like you are experiencing a DLNA/UPnP glitch. There are lots of threads on this topic (high-cpu usage related to drives filled with network-available media). I have not experienced this bug myself but it usually seems to be related to the scanning of the media files for cataloguing purposes.

 

[Nullity]

Just to help you close out the other part of of your question.

Unfortunately, top doesn't give you a total, just the pieces....so

CPU: 36.7% usr 26.3% sys 0.0% nic 0.0% idle 0.0% io 3.5% irq 33.3% sirq

is really
36.7% usr
26.3% sys
0.0% nic
0.0% idle
0.0% io
3.5% irq
33.3% sirq

add 'em up and you get 99.8%

...or, more simply, subtract "0.0% idle” from 100% to get the total.

 

[john9527]

...or, more simply, subtract "0.0% idle” from 100% to get the total.

Long way for educational purposes