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Re: Wrong Display of System CPU Usage

From: Matt Corks
Subject: Re: Wrong Display of System CPU Usage
Date: Tue, 6 Feb 2007 19:08:14 -0500
User-agent: Mutt/1.5.13 (2006-08-11)

Ah, that makes sense.  This also explains why I haven't been able to
reproduce this error since rebooting recently.  Many thanks, Ron and

 -- matt

On Tue, Feb 06, 2007 at 05:14:20PM +0100, Martin Pala wrote:
>Thanks for the patch :)
>It was added to cvs ... Matt's and Alex's problem regarding linux cpu 
>usage statistics should be solved.
>Ron Avriel wrote:
>>On one of my Linux systems monit erroneously reports the system CPU 
>>usage as ?82.6%us, 0.0%sy, 17.3%wa?, while the system is almost 
>>completely idle.
>>I traced down the problem to /proc/stat reporting CPU times larger than 
>>LONG_MAX, while the code assumes they?re (signed) long.
>>In function used_system_cpu_sysdep() in file process/sysdep_LINUX.c in , 
>>changing all ?long? variables to ?unsigned long long? and changing 
>>sscanf %ld to %llu fixed the problem.
>>BTW, the CPU times monit reads are the sum of all CPUs times, so for a 
>>four CPU system the problem occurs after 124 days.
>>Thanks for great product,
>>Express yourself instantly with MSN Messenger! Download today it's FREE! 
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