On Thu, Dec 08, 2005 at 03:35:05PM -0800, Christoph Lameter wrote:
> On Fri, 9 Dec 2005, Andi Kleen wrote:
>
> > > My experience is that at 20 systems do not need zone reclaim yet.
> >
> > I really cannot confirm your experience here.
>
> Maybe the meaning of these numbers varies? I know that 10 is a local
> access but the assumption in include/linux/numa.h that 20 is a remote
> access is probably already a guess.
The spec seems to suggest it's roughly the NUMA factor scaled (so for 1.4
you would get 14). But I haven't actually seen a Opteron with correct
SLIT yet so I don't know what they use ...
> I know that our Altix machines seem to use 10 for a local and 20 for
> nonlocal but same box. The distances then increase from there.
Unless non local same box is 2 times as slow as the local I wouldn't
consider that correct. (I would expect the Altix to do better than that)
-Andi
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
