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I wrote that because I noticed for days (from time I installed -18 kernel...) that
first cpu (only first...?... and with gkrellm is much evident) stay always on high
system-cpu on my dual xeon machine( compaq evo w8000, the only test smp I've) ....also
when I really do nothing (and in that time I expect cpus about 99% idle...)
...I thinked about some kind of bad thread management in smp environment with new
modules/new kernel version (on my single cpu system laptop I haven't that behaviour
with -18...doing nothing, cpu stay normally on 99% idle)
Now I've tried compile(nessus2 and nessus3 at the same time) on -16 enterprise and see
below.... I've 100% used on both cpus....and after compile ending both cpus return at
~99% idle it seems correct.....no? (I haven't noticed on my previous email that 0%
idle in top output.....really strange !?!):
during compile:
08:31:23 up 20:09, 24 users, load average: 0.43, 0.21, 0.34
103 processes: 101 sleeping, 2 running, 0 zombie, 0 stopped
09:21:06 up 20:59, 24 users, load average: 0.71, 0.27, 0.13
114 processes: 108 sleeping, 5 running, 1 zombie, 0 stopped
CPU0: 76.5% user 23.6% system 0.0% nice 0.0% iowait 0.0% idle
CPU1: 74.9% user 25.0% system 0.0% nice 0.0% iowait 0.0% idle
Mem: 1033364k av, 1009132k used, 24232k free, 0k shrd, 33892k buff
280652k active, 615408k inactive
Swap: 1052216k av, 4064k used, 1048152k free 744316k cached
after compile:
08:31:23 up 20:09, 24 users, load average: 0.43, 0.21, 0.34
103 processes: 101 sleeping, 2 running, 0 zombie, 0 stopped
09:21:06 up 20:59, 24 users, load average: 0.71, 0.27, 0.13
114 processes: 108 sleeping, 5 running, 1 zombie, 0 stopped
09:37:48 up 21:16, 24 users, load average: 0.00, 0.02, 0.06
102 processes: 101 sleeping, 1 running, 0 zombie, 0 stopped
CPU0: 0.3% user 0.3% system 0.0% nice 0.0% iowait 99.2% idle
CPU1: 0.7% user 0.5% system 0.0% nice 0.0% iowait 98.6% idle
Mem: 1033364k av, 1005420k used, 27944k free, 0k shrd, 33836k buff
285716k active, 606620k inactive
Swap: 1052216k av, 4064k used, 1048152k free 744048k cached
...cu....and good work....;o)
On Tuesday 05 November 2002 20:57, Todd Lyons wrote:
> Franco Silvestro wrote on Tue, Nov 05, 2002 at 01:24:39PM +0100 :
> > I see that with last kernel-enterprise (doing nothing), very high system
> > cpu: CPU0: 0.5% user 84.4% system 0.0% nice 0.0% iowait 14.9%
> > idle CPU1: 9.5% user 10.9% system 0.0% nice 0.0% iowait 79.4%
> > idle
> >
> > also with last kernel-smp (doing nothing), very high system cpu:
> > CPU0: 0.9% user 79.8% system 0.0% nice 0.0% iowait 19.2% idle
> > CPU1: 0.9% user 0.3% system 0.0% nice 0.0% iowait 98.6% idle
>
> I honestly have not seen this. I have high userspace times, but not
> system times.
>
> > else with old kernel-enterprise-2.4.19.16mdk-1-1mdk (doing nothing) seems
> > ok : CPU0: 0.0% user 0.0% system 0.0% nice 0.1% iowait 0.0%
^^^^^
> > idle CPU1: 0.0% user 0.0% system 0.0% nice 0.1% iowait 0.0%
^^^^^
I haven't noticed that 0%
idle.....really strange !?!
> > idle
>
> You've highlighted something I saw on another machine. Notice how on
> the .16mdk the numbers don't add up? Even in a heavy compile, the
> numbers won't add up to 100%. There seems to be some kind of scaling
> that is happening.
>
> Blue skies... Todd
- --
Franco Silvestro
c/o CeSIA - Alma Mater Studiorum - Universita' di Bologna
'lynx -source http://www.reti.unibo.it/FrancoSilvestro.asc | gpg --import'
Key fingerprint = 3145 1309 C5D8 7B3F 2582 44D2 91BB ACAB E010 ABF9
Current Linux uptime: 20 hours 20 minutes.
- -----------------------------------------
Wed Nov 6 08:42:24 CET 2002
- -----------------------------------------
Linux 2.4.19-16mdkenterprise GNU/Linux
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