Date: Tue, 22 Jan 2008 21:02:01 +0100 From: Hartmut Brandt <hartmut.brandt@dlr.de> To: Bartosz Giza <gizmen@blurp.pl> Cc: freebsd-current@freebsd.org Subject: Re: bsnmpd daemon eating all cpu Message-ID: <47964BB9.8030602@dlr.de> In-Reply-To: <200801221934.20774.gizmen@blurp.pl> References: <200801221438.53254.gizmen@blurp.pl> <20080122172058.Y94121@knop-beagle.kn.op.dlr.de> <200801221934.20774.gizmen@blurp.pl>
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Bartosz Giza wrote:
> Tuesday 22 of January 2008 17:25:15 Harti Brandt napisał(a):
>> Hi,
>>
>> On Tue, 22 Jan 2008, Bartosz Giza wrote:
>>
>> BG>I am using dell poweredge sc440 router with one xeon dual core cpu.
>> BG>This is basicly only router for dummynet firewall dhcpd and named.
>> BG>I want to run bsnmpd daemon but when i start it it starts eating all cpu
>> from BG>one core.
>> BG>I have run truss to check what it is doing and i have got huge amount of
>> such BG>syscalls
>> BG>gettimeofday({1201008182.366354},0x0) = 0 (0x0)
>> BG>
>> BG>I want to use this daemon because it is in base system but if i could
>> not run BG>this daemon in normal way i will be forced to use net-snmpd
>> port. BG>I have basic config with hotres module added.
>> BG>I am running freebsd 7.0-prerelease.
>> BG>Alsa what is strange i have exactly the same machine with freebsd
>> BG>7.0-prerelase but with only one network card for testing and bsnmpd
>> behaves BG>normal.
>> BG>Could some one help me with this. I can send dump from truss or even do
>> some BG>more testing.
>>
>> Could you please disable all modules? Just comment out all lines starting
>> from the Load MIB-2 module line. What does it do then?
>
> When i turn off all modules bsnmpd uses 0% of cpu. When i have added this
> snmp_mibII.so module it started again to use 100% of one core.
> On other UP kernels with 7-PRE bsnmpd behaves good. And also when i was trying
> to find what is going on i found that it happens when there is quite bit of
> traffic on interfaces.
> For test purposes i have downed lan interface and bsnmpd stopped to use 100%
> of cpu. And when i have brought up lan interface bsnmpd started again to use
> 100% od cpu. So it is related to IP traffic.
I have a feeling that this is related to the 64-bit counter emulation.
Could you please tell me what interfaces you have in that machine and on
what speed they are running? Have you set any of the begemot* variables
for MIB-2 in snmpd.conf (especially the polling related ones)? Maybe
just send me the snmpd.conf?
harti
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