Bogomips?

Bogomips?

[David Frascone]

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?

-Dave

-- 
David Frascone

Gimme back my face! You're getting it ugly.

Re: Bogomips?

[Greg Weeks]

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

RE: Bogomips?

[Rune Torgersen]

It's way low...
(output from a 8560 on 2.6.11):
cpu             : e500
revision        : 2.0 (pvr 8020 0020)
bogomips        : 823.29
Vendor          : Freescale Semiconductor
Machine         : mpc8560ads
clock           : 825MHz
PVR             : 0x80200020
SVR             : 0x80700020
PLL setting     : 0x5
Memory          : 256 MB=20

The 8260 one seems correct
cpu             : 82xx
revision        : 16.20 (pvr 8081 1014)
bogomips        : 191.48
core clock      : 289 MHz
CPM  clock      : 206 MHz
bus  clock      : 82 MHz

> -----Original Message-----
> From: linuxppc-dev-bounces@ozlabs.org=20
> [mailto:linuxppc-dev-bounces@ozlabs.org] On Behalf Of David Frascone
> Sent: Wednesday, April 06, 2005 08:12
> To: linuxppc-dev@ozlabs.org
> Subject: Bogomips?
>=20
>=20
> Can this be right?  I'm getting This from a MPC-8260 (/proc/cpuinfo):
>=20
> ------------------------------------------------
> cpu             : 82xx
> core clock      : 199 MHz
> CPM  clock      : 133 MHz
> bus  clock      : 33 MHz
> revision        : 1.1 (pvr 0081 0101)
> bogomips        : 133.12
> ------------------------------------------------
>=20
> 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
> ------------------------------------------------
>=20
>=20
> The second one looks way low . . . any ideas?
>=20
> -Dave
>=20
> --=20
> David Frascone
>=20
> Gimme back my face! You're getting it ugly.
> _______________________________________________
> Linuxppc-dev mailing list
> Linuxppc-dev@ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-dev
>=20
>=20

Re: Bogomips?

[David Frascone]

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...