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List:       linux-smp
Subject:    Re: BogoMIPS
From:       jlewis () lewis ! org
Date:       2000-05-21 2:19:26
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On 19 May 2000, Johan Kullstam wrote:

> > I have a dual PII/450, and recently upgraded to kernel 2.2.15.  Ever since
> > the upgrade, I think, the kernel has been reporting 900 or so bogoMIPS for
> > each CPU (it always used to report around 450 for each).  Is this anything
> > to worry about, or doesn't it matter?
> 
> this was discussed a couple of weeks ago.  apparently the bogomips
> number has been doubled by the kernel code.  1 old bogomip = 2 new
> ones.  afaik there is nothing amiss with your system.

It looks like the relationship between old bogomips and new bogomips
varies with processor type (just like bogomips:mhz varies by processor
generation).  On my dual P120, I just upgraded to 2.2.15 today, and the
factor is 5.

[root@sloth /root]# grep -i bogomip /var/log/messages
May 20 18:14:09 sloth kernel: Calibrating delay loop... 238.39 BogoMIPS 
May 20 18:14:09 sloth kernel: Calibrating delay loop... 239.21 BogoMIPS 
May 20 18:14:09 sloth kernel: Total of 2 processors activated (477.59
BogoMIPS).

May 14 15:57:28 sloth kernel: Calibrating delay loop... 47.72 BogoMIPS 
May 14 15:57:28 sloth kernel: Calibrating delay loop... 47.82 BogoMIPS 
May 14 15:57:28 sloth kernel: Total of 2 processors activated (95.54
BogoMIPS). 


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 Jon Lewis *jlewis@lewis.org*|  I route
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