A 4xDC would be far more sensitive to poor NUMA code than 2xDC so I'm
not surprised I don't see performance issues on our 2xDC w/ < 2.6.12.
J. Andrew Rogers wrote:
On 7/30/05 12:57 AM, "William Yu" <[EMAIL PROTECTED]> 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
---------------------------(end of broadcast)---------------------------
TIP 2: Don't 'kill -9' the postmaster
---------------------------(end of broadcast)---------------------------
TIP 5: don't forget to increase your free space map settings
