Date: Fri, 29 Jan 2010 23:30:46 +0100 From: =?ISO-8859-1?Q?Gustau_P=E9rez?= <gperez@entel.upc.edu> To: Mikolaj Golub <to.my.trociny@gmail.com> Cc: freebsd-stable@freebsd.org Subject: Re: bsnmpd returns incorrect hrProcessorLoad values Message-ID: <4B636196.9030101@entel.upc.edu> In-Reply-To: <86ljfg7hl3.fsf@kopusha.onet> References: <4B62C890.3020802@entel.upc.edu> <86ljfg7hl3.fsf@kopusha.onet>
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En/na Mikolaj Golub ha escrit: > On Fri, 29 Jan 2010 12:37:52 +0100 Gustau Pérez wrote: > > >> Hi, >> >> I'm using cacti to monitor some servers running FBSD. I was using 7.2 >> with SCHED_4BSD. With this configuration : bsnmpd+bsnmp-ucd was >> returning right values for the cores' load. >> >> I recently updated the servers (via csup) to RELENG_8 and bsnmpd is >> returning negative values for the cores' load. If I try something like >> in a 4-core system : >> >> snmpwalk -v 2c -c community server .1.3.6.1.2.1.25.3.3.1 >> >> what I get is : >> >> .1.3.6.1.2.1.25.3.3.1.1.6 = OID: .0.0 >> .1.3.6.1.2.1.25.3.3.1.1.10 = OID: .0.0 >> .1.3.6.1.2.1.25.3.3.1.1.14 = OID: .0.0 >> .1.3.6.1.2.1.25.3.3.1.1.18 = OID: .0.0 >> .1.3.6.1.2.1.25.3.3.1.2.6 = INTEGER: -182 >> .1.3.6.1.2.1.25.3.3.1.2.10 = INTEGER: -182 >> .1.3.6.1.2.1.25.3.3.1.2.14 = INTEGER: -182 >> .1.3.6.1.2.1.25.3.3.1.2.18 = INTEGER: -182 >> >> I tried and old bsnmpd-ucd (0.2.1, works fine in a 7,2 system) with a >> 8.0 system. Same wrong results. And it seems bsnmpd in /usr/src/contrib >> has not changed between 7.2 and 8.0. >> >> Any ideas ? I'm not an expert, but with tcpdump I see different >> results. Against an old 7.2 system, the field related to each core load >> gives the right value. Instead, against and 8.0 system, those field show >> (in hex) values like fd 4b. What I don't know is how bsdnmp-ucb retrives >> those values and how it construct the udp response packet. >> > > bsnmpd-ucd has nothing to do with HOST-RESOURCES-MIB. These mibs are provided > by snmp_hostres(3) module (/usr/lib/snmp_hostres.so). So something wrong is > there (I suppose it is not in sync with some recent changes in kernel or > libkvm). > > I thought the same with a grep -r in the bsnmpd-ucd port. But If I deinstall bsnmpd-ucb then I can't check those mibs. Anyway, changing the scheduler to SCHED_ULE gives a 100% for all processors. Maybe that can be a hint. Regards, Gus -- PGP KEY : http://www-entel.upc.edu/gus/gus.asc
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