[ofa-general] Problem while running ib tests

[Jason Gunthorpe]

On Wed, Sep 23, 2009 at 12:01:02PM +0300, Moni Shoua wrote:

> > 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".

> 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)

This whole thing should just be removed. x86-64 linux has a VDSO
clock_gettime(CLOCK_MONOTONIC) that is fast, doesn't trap into the
kernel, and doesn't suffer from these problems.

Jason