Hi Thomas,

On Thu, 16 Aug 2012, Thomas Fjellstrom wrote:

> I have a 6501-50 and installed Debian Sid onto a 32G mSATA SSD.
>
> I haven't done extensive testing but performance seems to be good network
> wise. However when I run htop it shows a near constant 100% cpu use most of
> which is tagged as kernel use but it isn't assigned to any specific kernel
> threads.
>
> Has anyone witnessed anything like this on their 6501's?

That looks like a bug in htop. I can see the same thing on Squeeze and a 
custom 3.2 kernel, except that it's not accounted to kernel, it's not 
accounted at all:

   1  [******************************************************100.0%] 
Tasks: 93 total, 1 running
   2  [##***                                                   5.6%] 
Load average: 0.43 0.65 0.74
   Mem[|||||||||||||||||||||############******************306/882MB] 
Uptime: 2 days, 22:07:03
   Swp[                                                       0/0MB]

   PID USER     PRI  NI  VIRT   RES   SHR S CPU% MEM%   TIME+  Command
  7764 root      20   0  2552  1256   964 R  9.0  0.1  0:00.42 htop
  2423 root      20   0 24380 15096 14452 S  3.0  1.7  2h46:45 pmacctd:
   Core Process [default]
  2462 proxy     20   0  180M  155M  2256 S  1.0 17.6 57:16.83 (squid) -YC
   -f /etc/squid3/squid.conf
11329 dnsmasq   20   0  5312  1596   708 S  1.0  0.2  2:19.03
   /usr/sbin/dnsmasq -x /var/run/dnsmasq/dnsmasq.pid -u dnsmasq -r
   /var/run/dnsmas
  2464 root      20   0 21280 11556 10776 S  0.0  1.3 19:24.03 pmacctd: IMT
   Plugin [default]
  2591 tomcat6   20   0  263M 39792  2020 S  0.0  4.4 14:21.65
   /usr/lib/jvm/java-6-openjdk/bin/java
   -Djava.util.logging.config.file=/var/lib/t
  3531 mysql     20   0  133M 29092  1948 S  0.0  3.2  1:55.54
   /usr/sbin/mysqld --basedir=/usr --datadir=/media/hdb1/mysql --user=mysql
   --pid-

While top shows that the system is mostly idle:

top - 11:43:34 up 2 days, 22:05,  2 users,  load average: 0.49, 0.71, 0.76
Tasks: 115 total,   1 running, 113 sleeping,   0 stopped,   1 zombie
Cpu0  :  0.0%us,  1.8%sy,  0.0%ni, 90.1%id,  0.0%wa,  0.0%hi,  8.1%si, 
0.0%st
Cpu1  :  1.0%us,  1.0%sy,  0.0%ni, 98.0%id,  0.0%wa,  0.0%hi,  0.0%si, 
0.0%st
Mem:    903632k total,   884628k used,    19004k free,   176692k buffers
Swap:        0k total,        0k used,        0k free,   393492k cached

   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
  2423 root      20   0 24380  14m  14m S    6  1.7 166:41.26 pmacctd
  7614 root      20   0  2504 1164  896 R    1  0.1   0:01.99 top
  1014 nobody    20   0  6168 3716 1744 S    1  0.4  31:17.17 openvpn
   719 root      20   0     0    0    0 S    0  0.0   0:31.93 flush-254:1
  2462 proxy     20   0  180m 155m 2256 S    0 17.6  57:16.04 squid3

htop might be a bit broken.

Cheers, Chris.
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