Re: which program can test cpu speed
On Fri, Oct 26, 2018 at 07:51:16PM +0200, Pascal Hambourg wrote:
> Le 26/10/2018 à 16:34, Reco a écrit :
> >
> > On Fri, Oct 26, 2018 at 09:59:16AM -0400, Michael Stone wrote:
> > > On Fri, Oct 26, 2018 at 08:57:29AM +0300, Reco wrote:
> > > >
> > > > grep bogomips /proc/cpuinfo
> > >
> > > Anyone reading that advice: ignore it. You cannot use bogomips to meaningfully compare processors.
> >
> > The reason being?
> > The kernel uses it just fine for the clock calibration.
>
> As far as I remember, the bogomips number has consistently been twice the current clock frequency on any x86 PCU I have ever run Linux on.
Either your math is off, or they've changed it.
$ lscpu | egrep '(Vendor|MHz|MIPS)' # This PC
Vendor ID: GenuineIntel
CPU MHz: 1599.975
CPU max MHz: 3800.0000
CPU min MHz: 1600.0000
BogoMIPS: 6800.59
$ lscpu | egrep '(Vendor|MHz|MIPS)' # Certain VPS
Vendor ID: GenuineIntel
CPU MHz: 2099.996
BogoMIPS: 4199.99
And,
$ lscpu | egrep '(Vendor|MHz|MIPS)' # Xeon X5675
Vendor ID: GenuineIntel
CPU MHz: 1600.000
BogoMIPS: 6117.70
> How can you measure and compare processor performance from the mere clock frequency ?
That's I agree with.
REco
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