Modify BIOS Setting & Stuck in BIOS

[江立中]

Hi Cloudlab Team,

My current experiments are https://www.cloudlab.us/status.php?uuid=6af8a7be-9010-11ed-b318-e4434b2381fc# and https://www.cloudlab.us/status.php?uuid=8e7aebc5-907d-11ed-b318-e4434b2381fc# , which are running on r6525 and d6515 respectively.

I want to test the memory performance on machines where cache prefetchers and memory interleaving are disabled.

After looking into the default BIOS options, I found several options to modify.

System Setup -> Memory Setting -> 

                                            Memory Interleaving -> Disabled

System Setup -> Processor Setting ->

                                            "All kinds of" Prefetchers -> Disabled

To the best of my knowledge, the prefetchers options may be different due to the microarchitecture (Zen3 for r6525 and Zen2 for d6515), and I want to disable all of them.

Could you help me with this?

Also, I accidentally had both machines stuck in the BIOS when I was checking the BIOS options using consoles. I could not solve this situation even RELOAD the nodes.

Could you also help me solve it?

Sorry about that. I will be much more careful when using the console.

Thank you!

Sincerely,

Michael

[Mike Hibler]

You had tried a bunch of BIOS setup passwords and it eventually halted the
system. Next time just choose "Power Cycle" from the node menu.

I have disabled the options you mention on those two nodes.

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