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Date: Wed, 6 Apr 2005 14:29:47 -0500
From: David Frascone <dave@frascone.com>
To: Greg Weeks <greg.weeks@timesys.com>
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Subject: Re: Bogomips?
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That nailed it (branch prediction)!

------------------------------------------------
# cat /proc/cpuinfo
cpu             : e500
revision        : 2.0 (pvr 8020 0020)
bogomips        : 665.19
Vendor          : Motorola SPS
Machine         : mpc8540ads
bus freq        : 666.666660 MHz
PVR             : 0x80200020
SVR             : 0x80300020
PLL setting     : 0x4
Memory          : 512 MB
------------------------------------------------

Thanks!

-Dave


On Wed, 06 Apr 2005 09:53:15 -0400
Greg Weeks <greg.weeks@timesys.com> wrote:

> David Frascone wrote:
> 
> >Can this be right?  I'm getting This from a MPC-8260 (/proc/cpuinfo):
> >
> >------------------------------------------------
> >cpu             : 82xx
> >core clock      : 199 MHz
> >CPM  clock      : 133 MHz
> >bus  clock      : 33 MHz
> >revision        : 1.1 (pvr 0081 0101)
> >bogomips        : 133.12
> >------------------------------------------------
> >
> >And this from a MPC-8540
> >------------------------------------------------
> >cpu             : e500
> >revision        : 2.0 (pvr 8020 0020)
> >bogomips        : 190.05
> >Vendor          : Motorola SPS
> >Machine         : mpc8540ads
> >bus freq        : 666.666660 MHz
> >PVR             : 0x80200020
> >SVR             : 0x80300020
> >PLL setting     : 0x4
> >Memory          : 512 MB
> >------------------------------------------------
> >
> >
> >The second one looks way low . . . any ideas?
> >  
> >
> Do you have cache turned on? Do you have branch prediction turned on? 
> Branch prediction would be my guess as it's easy to miss.
> 
> Greg Weeks
> 


-- 
David Frascone

Closed Hearing for the Caption Impaired...