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Hello Ana,
Linux-rdma/perftest uses RDMA Write only. RDMA Write ends when PCIe Write is initiated (but not finished).
The tool has been designed to test only RDMA performance and is not aware of memory persistency.
In example you mentioned https://github.com/pmem/rpma/tree/master/examples/04-write-to-persistent RDMA Read is used to flush data from RNIC and also push data out from PCIe bus based on PCIe ordering/fencing rules.
Best regards
Tomasz
From: pm...@googlegroups.com <pm...@googlegroups.com> On Behalf Of Ana Khorguani
Sent: Tuesday, July 5, 2022 10:56 AM
To: pmem <pm...@googlegroups.com>
Subject: Re: ibv_reg_mr returns -EOPNOTSUPP for mapped files
Hello Tomasz,
About DDIO, I used https://github.com/aliireza/ddio-bench benchmark do disable it during my experiments.
Thank you for the pointers. I will look into fio engine.
I also tried using the example from rpma, here: https://github.com/pmem/rpma/tree/master/examples/04-write-to-persistent This seems to work better, since I see the read and write bandwidth to pmem. Now I am trying to understand what is different with this benchmark compared to linux-rdma/perftest.
Best regards,
Ana
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