On Sat, 2006-10-28 at 07:28 +0200, Willy Tarreau wrote:
> On Fri, Oct 27, 2006 at 11:28:00PM -0400, Lee Revell wrote:
> > On Fri, 2006-10-27 at 18:04 -0700, Andi Kleen wrote:
> > > I don't think it makes too much sense to hack on pure RDTSC when
> > > gtod is fast enough -- RDTSC will be always icky and hard to use.
> >
> > I agree FWIW, our application would be happy to just use gtod if it
> > wasn't so slow on these machines.
>
> Agreed, I had to turn about 20 dual-core servers to single core because
> the only way to get a monotonic gtod made it so slow that it was not
> worth using a dual-core. I initially considered buying one dual-core
> AMD for my own use, but after seeing this, I'm definitely sure I won't
> ever buy one as long as this problem is not fixed, as it causes too
> many problems.
Does anyone know if the problem will really be fixed in new CPUs, as AMD
promised a year or so ago?
http://lkml.org/lkml/2005/11/4/173
Since that post, there has been Socket F and AM2 which apparently have
the same issue.
Were the AMD guys just blowing smoke?
Lee
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