Re: Performance problems on 4/8way Opteron (dualcore)

On 7/30/05 12:57 AM, "William Yu" <wyu@talisys.com> wrote:
> I haven't investigated the 2.6.12+ kernel updates yet -- I probably will
> do our development servers first to give it a test.


The kernel updates make the NUMA code dual-core aware, which apparently
makes a big difference in some cases but not in others.  It makes some
sense, since multi-processor multi-core machines will have two different
types of non-locality instead of just one that need to be managed.  Prior to
the v2.6.12 patches, a dual-core dual-proc machine was viewed as a quad-proc
machine.

The closest thing to a supported v2.6.12 kernel that I know of is FC4, which
is not really supported in the enterprise sense of course.


J. Andrew Rogers