ECC scrub options?

[Brian Long <brilong cisco com>]

Hello,

I sent this to amd64-list yesterday and received no response.  I've
noticed different vendors use different BIOS defaults for the AMD64
ECC hardware scrubbing.

                        Tyan S2884 | Sun V40z (Newisys 4300)
-----------------------------------|---------
Dcache ECC Scrub Ctl    Disabled   | 5.12us
L2 ECC Scrub Ctl        Disabled   | 10.2us
Dram ECC Scrub Ctl      1.3ms      | 163.8us

Has anyone on this list experimented with how these values affect
application and OS performance on RHEL 3 AMD64?  We've seen blackbox
servers running the Tyan motherboard outperform Tier 1 vendor Quad
Opteron machines and I wonder how much these settings have to do with
it.  Thanks for any info.

/Brian/
-- 
       Brian Long                      |         |           |
       IT Data Center Systems          |       .|||.       .|||.
       Cisco Linux Developer           |   ..:|||||||:...:|||||||:..
       Phone: (919) 392-7363           |   C i s c o   S y s t e m s