forwarding to this list as Scott asked this question.

-Kumar


Begin forwarded message:

From: "Allen, Benjamin S." <bsallen@alcf.anl.gov>
Subject: Re: Memory Mode for MCDRAM
Date: April 4, 2016 at 12:22:49 PM CDT
To: "Kirkendall, Keith G" <keith.g.kirkendall@intel.com>
Cc: "Fromkin, Russ" <russ.fromkin@intel.com>, "Allison, CM" <cm.allison@intel.com>, "Kumaran, Kalyan" <kumaran@alcf.anl.gov>

I'm hoping to not have to use expect scripts or similar via a serial console over IPMI to edit the BIOS. Ideally something exposed via IPMI that could be set via "ipmitool raw" or similar.

Thanks,

Ben

On Apr 4, 2016, at 12:13 PM, Kirkendall, Keith G <keith.g.kirkendall@intel.com> wrote:

I will check.  It seems reasonable that you could change a BIOS setting via a script somehow & have it take effect on reboot.  I know we do that with core count settings on some of our clusters.

-----Original Message-----
From: Allen, Benjamin S. [mailto:bsallen@alcf.anl.gov]
Sent: Monday, April 4, 2016 12:10 PM
To: Fromkin, Russ <russ.fromkin@intel.com>; Kirkendall, Keith G <keith.g.kirkendall@intel.com>
Cc: Allison, CM <cm.allison@intel.com>; Kumaran, Kalyan <kumaran@alcf.anl.gov>
Subject: Memory Mode for MCDRAM

Russ and Keith,

Do you know or can you find out if there's a way to change the Memory model for the 2LM (MCDRAM) via some mechanism from Linux or IPMI, (eg. from cached to flat mode). We're hoping to provide the users some self-service ability to change the mode and have it in effect on reboot.

Thanks,

Ben