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Bug 1069979

Summary: SNMP HRPROCESSORLOAD RETURNS INCORRECT VALUES FOR PROCESSOR #'S > 100
Product: Red Hat Enterprise Linux 5 Reporter: Luan Jianhai <jianhai.luan>
Component: net-snmpAssignee: Jan Safranek <jsafrane>
Status: CLOSED NEXTRELEASE QA Contact: BaseOS QE Security Team <qe-baseos-security>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 5.9CC: jianhai.luan, joe.jin
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
: 1070075 1070076 (view as bug list) Environment:
Last Closed: 2014-02-26 08:30:02 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 1070075, 1070076    
Attachments:
Description Flags
The patch to fix the issue. none

Description Luan Jianhai 2014-02-26 02:22:56 UTC 
Created attachment 867723 [details]
The patch to fix the issue.

Description of problem:
using snmp monitor cpu usage with more than 100 processors. hrProcessorLoad will returns incorrect values for processor #'s > 100

Version-Release number of selected component (if applicable):
RHEL 5.x RHEL 6.x

How reproducible:

Steps to Reproduce:
1. using snmp monitor cpu usage with more than 100 processors.

Actual results:
hrProcessorLoad will return incorrect values for processor #'s

Expected results:
hrProcessorLoad will return correct values for processor #'s (letter than 100)

Additional info:
http://mailing.unix.net-snmp-users.narkive.com/o21D50GY/hrprocessorload-returns-incorrect-values-for-processor-s-100

The file agent/mibgroup/hardware/cpu/cpu_linux.c: netsnmp_cpu_arch_load() use below  hard code to skip cpuN
  b1 = b2+5; /* Skip "cpuN " */

When processor more than 100, the value will be wrong.
Comment 1 Luan Jianhai 2014-02-26 02:41:40 UTC 
The patch have be applied to net-snmp upstream:
  http://git.code.sf.net/p/net-snmp/code: 
commit eef2f64b46357b353c79504bc593535ebe7421e7
Author: Niels Baggesen <nba.net>
Date:   Thu Jan 23 16:27:07 2014 +0100

    cpu_linux: support systems with more than 100 cpus.
Comment 2 Jan Safranek 2014-02-26 08:30:02 UTC 
Thanks for the report. RHEL 5 is in maintenance mode and only critical bugs are fixed. Please contact your Red Hat support, e.g. at https://access.redhat.com/ and negotiate an exception.

I've cloned the bug into newer RHEL releases (6+7) and it should be better there. However, a support ticket would speed up the bugfix there.