kern/126880: CPU usages are unbalanced

[Remko Lodder]

The following reply was made to PR kern/126880; it has been noted by GNATS.

From: "Remko Lodder" <remko at elvandar.org>
To: "KOIE Hidetaka" <koie at suri.co.jp>
Cc: freebsd-gnats-submit at freebsd.org
Subject: Re: kern/126880: CPU usages are unbalanced
Date: Wed, 27 Aug 2008 13:31:36 +0200 (CEST)

 On Wed, August 27, 2008 12:51 pm, KOIE Hidetaka wrote:
 >
 >>How-To-Repeat:
 > This machine is dual-core opteron and dual-socket.
 > koie at guriandgura% top -HSn|grep idle
 >    11 root       171 ki31     0K    64K RUN    0  26.7H 41.55% {idle:
 > cpu0}
 >    11 root       171 ki31     0K    64K RUN    2  23.5H 31.88% {idle:
 > cpu2}
 >    11 root       171 ki31     0K    64K RUN    1  19.9H 15.19% {idle:
 > cpu1}
 >    11 root       171 ki31     0K    64K RUN    3  20.8H  9.18% {idle:
 > cpu3}
 > koie at guriandgura%
 >
 
 Hello,
 
 What exactly do you want to show/tell us with this? Yes the  idle times
 are unbalanced, some CPU's can be more busy then others, and thus have
 less IDLE time recorded and less CPU spending on being idle (sounds
 contradictive :-)), but I do not see that as a problem, remember that
 there are unthreaded applications that just work on a single CPU , which
 might have been CPU3....
 
 Thanks,
 remko
 
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