Arch Linux

monsieurseb

Member

Registered: 2005-04-12

Posts: 24

Website

Anormal cpu usage with kernel 2.6.17

Hi,

After upgrading my kernel, i noticed a strange cpu usage.

Outpout of top :

top - 13:34:40 up 34 min,  3 users,  load average: 0.00, 0.00, 0.01
Tasks:  85 total,   1 running,  83 sleeping,   1 stopped,   0 zombie
Cpu(s):  0.0%us,  0.3%sy,  0.0%ni, 87.7%id,  0.0%wa,  0.3%hi, 11.6%si,  0.0%st

why 11.6 %si, i nerver see that before the last upgrade.

Thanks for your help.

Edit :

[seb@pingus ~]$ cat /proc/cpuinfo
processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 6
model           : 8
model name      : AMD Athlon(tm) XP 2600+
stepping        : 1
cpu MHz         : 2075.627
cache size      : 256 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse syscall mmxext 3dnowext 3dnow up ts
bogomips        : 4152.85

monsieurseb

Member

Registered: 2005-04-12

Posts: 24

Website

Re: Anormal cpu usage with kernel 2.6.17

hmm no idea ?

I've opened a bug report : http://bugs.archlinux.org/task/5335

rpgcyco

Member

From: Australia

Registered: 2005-09-27

Posts: 74

Re: Anormal cpu usage with kernel 2.6.17

Hey,

I also have this problem, or at least a similar problem. Do you use the official NVIDIA drivers?

I posted a bug report over a month ago... no progress as of yet.

http://bugs.archlinux.org/task/5137

- Rpg Cyco

tomk

Forum Fellow

From: Ireland

Registered: 2004-07-21

Posts: 9,839

Re: Anormal cpu usage with kernel 2.6.17

Does this make any noticeable difference to your PC's performance?

Just curious.

monsieurseb

Member

Registered: 2005-04-12

Posts: 24

Website

Re: Anormal cpu usage with kernel 2.6.17

Does this make any noticeable difference to your PC's performance?

Just curious.

No , i did nit see any difference.

There is the same behaviour with or without nvidia driver.

rpgcyco

Member

From: Australia

Registered: 2005-09-27

Posts: 74

Re: Anormal cpu usage with kernel 2.6.17

Does this make any noticeable difference to your PC's performance?

Just curious.

For me, yes. As I said in the bug report, my computer is very laggy when the problem exists. I can't stand using it.

At the moment, I am using custom compiled versions of the 2.6.16 kernel (2.6.16.27, will update to .28 today) and the latest NVIDIA drivers. With this configuration, everything is fine.

There is the same behaviour with or without nvidia driver.

Bummer. I guess our problems are different. I experience the slowdown only when using X with the NVIDIA drivers. When X is not running, or I am using the "nv" driver, the problem does not occur.

- Rpg Cyco

monsieurseb

Member

Registered: 2005-04-12

Posts: 24

Website

Re: Anormal cpu usage with kernel 2.6.17

Back to 2.6.16.28 and everything is ok  :?