Insan Praja SW ??:
On Tue, 27 Nov 2007 02:42:39 +0700, NetOne - Doichin Dokov
[EMAIL PROTECTED] wrote:
It seems net-snmp gives wrong data about CPU usage on OpenBSD. This
is the data that i get (i've snipped some irrelevant OIDs)
# snmpwalk -v2c -c community localhost .1.3.6.1.4.1.2021.11
UCD-SNMP-MIB::ssCpuUser.0 = INTEGER: 0
UCD-SNMP-MIB::ssCpuSystem.0 = INTEGER: 0
UCD-SNMP-MIB::ssCpuIdle.0 = INTEGER: 0
UCD-SNMP-MIB::ssCpuRawUser.0 = Counter32: 1196105427
UCD-SNMP-MIB::ssCpuRawNice.0 = Counter32: 386973
UCD-SNMP-MIB::ssCpuRawSystem.0 = Counter32: 1179540172
UCD-SNMP-MIB::ssCpuRawIdle.0 = Counter32: 1196105427
UCD-SNMP-MIB::ssCpuRawWait.0 = Counter32: 0
UCD-SNMP-MIB::ssCpuRawKernel.0 = Counter32: 1
UCD-SNMP-MIB::ssCpuRawInterrupt.0 = Counter32: 1179540171
These are the same counters, but after some minutes:
# snmpwalk -v2c -c community localhost .1.3.6.1.4.1.2021.11
UCD-SNMP-MIB::ssCpuUser.0 = INTEGER: 0
UCD-SNMP-MIB::ssCpuSystem.0 = INTEGER: 0
UCD-SNMP-MIB::ssCpuIdle.0 = INTEGER: 0
UCD-SNMP-MIB::ssCpuRawUser.0 = Counter32: 1196105547
UCD-SNMP-MIB::ssCpuRawNice.0 = Counter32: 633528
UCD-SNMP-MIB::ssCpuRawSystem.0 = Counter32: 1179540175
UCD-SNMP-MIB::ssCpuRawIdle.0 = Counter32: 1196105547
UCD-SNMP-MIB::ssCpuRawWait.0 = Counter32: 0
UCD-SNMP-MIB::ssCpuRawKernel.0 = Counter32: 4
UCD-SNMP-MIB::ssCpuRawInterrupt.0 = Counter32: 1179540171
The SNMP data shows lots of NICE activity and nothing for interrupts.
In the same time, top reports this:
CPU0 states: 0.6% user, 0.0% nice, 1.0% system, 32.9% interrupt,
65.5% idle
The SNMP counters seem completely irrelevant to CPU usage. Here's
another example of two consecutive snmpwalks, executed right after
each other:
# snmpwalk -v2c -c community localhost .1.3.6.1.4.1.2021.11
UCD-SNMP-MIB::ssCpuUser.0 = INTEGER: 0
UCD-SNMP-MIB::ssCpuSystem.0 = INTEGER: 0
UCD-SNMP-MIB::ssCpuIdle.0 = INTEGER: 0
UCD-SNMP-MIB::ssCpuRawUser.0 = Counter32: 1196105672
UCD-SNMP-MIB::ssCpuRawNice.0 = Counter32: 890340
UCD-SNMP-MIB::ssCpuRawSystem.0 = Counter32: 1179540175
UCD-SNMP-MIB::ssCpuRawIdle.0 = Counter32: 4294865120
UCD-SNMP-MIB::ssCpuRawWait.0 = Counter32: 0
UCD-SNMP-MIB::ssCpuRawKernel.0 = Counter32: 0
UCD-SNMP-MIB::ssCpuRawInterrupt.0 = Counter32: 1297536800
# snmpwalk -v2c -c community localhost .1.3.6.1.4.1.2021.11
UCD-SNMP-MIB::ssCpuUser.0 = INTEGER: 0
UCD-SNMP-MIB::ssCpuSystem.0 = INTEGER: 0
UCD-SNMP-MIB::ssCpuIdle.0 = INTEGER: 100
UCD-SNMP-MIB::ssCpuRawUser.0 = Counter32: 65536
UCD-SNMP-MIB::ssCpuRawNice.0 = Counter32: 0
UCD-SNMP-MIB::ssCpuRawSystem.0 = Counter32: 1297536800
UCD-SNMP-MIB::ssCpuRawIdle.0 = Counter32: 4294865120
UCD-SNMP-MIB::ssCpuRawWait.0 = Counter32: 0
UCD-SNMP-MIB::ssCpuRawKernel.0 = Counter32: 0
UCD-SNMP-MIB::ssCpuRawInterrupt.0 = Counter32: 1297536800
Counters are completely irrelevant, look at ssCpuRawUser and
ssCpuRawNice.
Am I doing something wrong? What is the proper way to get CPU stats
off OpenBSD with net-snmp? I know the ticks are 10 000 by default on
OpenBSD, so I'm dividing the values accordingly, but still i don't
get proper stats. Anyone any ideas?
Regards,
Doichin
# uname -a
OpenBSD host.name.com 4.2 GENERIC.MP#0 amd64
Hi,
You should really checkout this site
http://www.packetmischief.ca/openbsd/snmp/
Cool..
cu,
Insan
Yup, I am using the patched net-snmp and am producing nice graphs with
pf stats I need. Still no clue about how to get the CPU data, though.
Looking at the added OPENBSD-* mibs, I don't see anything CPU related.
Am I missing something?
Regards,
Doichin
