On 04/29/12 01:53, Oliver Pinter wrote:
Attached the ktr file. This is on core2duo P9400 cpu (
smbios.system.product="HP ProBook 5310m (WD792EA#ABU)" ). The workload
is only a single user boost: sh + top running, but the load average is
near 0.5.
ktr shows no real load there. But it shows that you are using dummynet,
that schedules its runs on every hardclock tick. I believe that load you
see is the result or synchronization between dummynet calls and loadvg
sampling, both of which called from hardclock. I think removing dummynet
from equation, should hide this problem and also reduce you laptops
power consumption.
What's about fixing this, it is loadavg sampling algorithm that should
be changed. Fixing dummynet to not run on every hardclock tick would
also be great.
On 4/28/12, Alexander Motin<m...@freebsd.org> wrote:
On 04/28/12 00:34, Albert Shih wrote:
Le 27/04/2012 ? 22:45:40+0200, Oliver Pinter a écrit
I'm running 9-stable on all my computer. (csup yesterday).
On my desktop everything is fine. But I've two laptop, (both are Dell).
On
both latptop I've problem about the load, event when I do nothing I got
a
load between 0.5-1.
Here the result of a «top» on the laptop :
last pid: 2434; load averages: 0.63, 0.67, 0.59 up 0+00:23:59
22:25:29
57 processes: 3 running, 54 sleeping
CPU: 2.7% user, 0.0% nice, 3.7% system, 1.4% interrupt, 92.2% idle
Mem: 89M Active, 92M Inact, 198M Wired, 13M Cache, 100M Buf, 3529M Free
Swap: 4096M Total, 4096M Free
Here on the desktop :
last pid: 61010; load averages: 0.00, 0.00, 0.00 up 2+11:02:42
22:29:08
126 processes: 1 running, 125 sleeping
CPU: % user, % nice, % system, % interrupt, % idle
Mem: 803M Active, 2874M Inact, 1901M Wired, 112M Cache, 620M Buf, 202M
Free
Swap: 6144M Total, 36M Used, 6107M Free
http://lists.freebsd.org/pipermail/freebsd-bugs/2012-April/048213.html
What I understand of your message (I'm definitvly not a dev) is that's
only
a little problem of accounting.
I'm not absolute sure of that because my laptop fan never stop...
If you want any more information...
Definitely, because here I don't see much.
Generally, all CPU loads and load averages now calculated via sampling,
so theoretically with spiky load numbers may vary for many reasons. I
would start from collecting information about running processes. To find
fast switching processes that could hide from accounting try `top -SH -m
io -o vcsw`. To get more information about scheduler work, use
/usr/src/tools/sched/schedgraph.py (instruction inside it).
--
Alexander Motin
--
Alexander Motin
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