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Server Processors

wyatuestc
Journeyman III
‎09-08-2019 12:50 AM

Whether AMD EPYC 2 supports host-to-device PCIe AtomicOps?

Whether AMD EPYC 2 supports host-to-device PCIe AtomicOps?

This post said that AMD EPYC does not support PCIe AtomicOps If AMD EPYC support PCIe AtomicOps host-to-device transactions?   

How about the AMD EPYC2? Do you have any update on PCIe controllers?

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Anonymous
Not applicable
‎09-25-2019 03:07 PM

Hello,

Yes, the EPYC 7002 Series processors will support peer to peer atomic operations. 

wyatuestc
Journeyman III
‎10-23-2019 12:36 AM

I'm sorry and I want to know whether the PCIe controller (EPYC 7002 Series processors) can send atomic operations to PCIe devices?  Does peer to peer transaction include host-to-device transactions? 

 

BTW, I got a 7742 CPU, however the output of lspci shows that "AtomicOpsCtl: ReqEn-". If it supported, how can I enable this feature? 

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