On Wed, Sep 23, 2009 at 11:01 AM, Moni Shoua <mo...@voltaire.com> wrote:
>
> Sneha Mistry wrote:
> > I have two Dual port HCAa card.Which I have installed in
> > same PC.
> >
> > I am using OpenSuse 10.3  and installed OFED 1.4.
> >
> > If I try to run any IB bandwidth test or latency test it end us with warning
> > "Conflicting CPU frequency values detected: 2394.000000 != 1596.000000".
> >
> > Is it an OFED related problem or Linux kernel problem.
> >
> > HCA are connected back to back and output of ibstat is as given below.
>
> One more option to solve it (besides the -F) is to disable the power saving 
> of the CPU.
> In the power saving mode not all CPUs operate at the same Hz/sec rate (cycle 
> rate) and this is the reason for the conflict.
> Disabling the power saving mode is done in the BIOS and it is sometimes 
> called economy mode or performance mode (the other side of the trade off)

An alternative for configuring CPU frequency scaling via the BIOS is
to modify the variables in /sys/devices/system/cpu/cpu0/cpufreq. This
doesn't even require a reboot.

Bart.
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