Is MCX512A-ACAT compatible with ASPM?

Infrastructure & Networking Adapters and Cables Ethernet Adapter Cards
1

I thought that ConnectX-3 and below were incompatible with ASPM, and after plugging a MCX512A-ACAT, It blocks my CPU package from going into a C8 state as it used to, and it now stays at C2 with nothing plugged into the SFP ports.

01:00.0 Ethernet controller: Mellanox Technologies MT27800 Family [ConnectX-5]
LnkCap: Port #0, Speed 8GT/s, Width x8, ASPM not supported
LnkCtl: ASPM Disabled; RCB 64 bytes, Disabled- CommClk+
01:00.1 Ethernet controller: Mellanox Technologies MT27800 Family [ConnectX-5]
LnkCap: Port #0, Speed 8GT/s, Width x8, ASPM not supported
LnkCtl: ASPM Disabled; RCB 64 bytes, Disabled- CommClk+

I’m pretty much unable to find a working example of a ConnectX-5 reporting either L0s or L1. No luck enabling ADVANCED_POWER_SETTINGS or ADVANCED_PCI_SETTINGS.

So, does the card have any way to enable more power efficient modes? Or am I out of luck?

2

Hi Barrenechea,

Thank you for posting your question on NVIDIA community.

ASPM as mentioned in lspci output, is not supported by the HCA. However, you may check if the feature can be enabled in BIOS/system drivers.

In order to check system related details, it would be great if you can reach out to your server vendor.

Thanks,
Namrata.

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