在 2024/11/28 3:07, Cheng Xu 写道:
On 11/26/24 11:36 PM, Zhu Yanjun wrote:
在 2024/11/26 7:59, Boshi Yu 写道:
Currently, the erdma driver supports both the iWARP and RoCEv2 protocols.
The erdma driver reads the ERDMA_REGS_DEV_PROTO_REG register to identify
the protocol used by the erdma device. Since each protocol requires
different ib_device_ops, we introduce the erdma_device_ops_iwarp and
erdma_device_ops_rocev2 for iWARP and RoCEv2 protocols, respectively.
Hi, Boshi
From alomost all of the RDMA users, it seems that RoCEv2 protocol is required while very few users request iWARP protocol in their production hosts. But in the erdma HW/FW, this iWARP protocol is supported. Is this iWARP protocol for some special use cases in the Ali-Cloud environment?
Hi, Yanjun,
iWarp & TCP have some good features, such as Tail Loss Probe(TLP), selective ACK and
out-of-order DDP, so that can get better performance in large-scale lossy network. The
Thanks for your reply. The design purpose of RDMA is for big bandwidth
and low latency network, that is, a loss-less network. And most users
work in this loss-less network. I can not image why rdma should work in
this kind of large-scale lossy network.
Anyway
Reviewed-by: Zhu Yanjun <yanjun.zhu@xxxxxxxxx>
Zhu Yanjun
current usage scenarios include HPC industrial simulation, redis, PolarDB and big data
in public cloud environment.
Thanks,
Cheng Xu
I am just curious about this, not to be against this patch series. If this is related with the Ali-Cloud security, you can ignore this.
Thanks,
Zhu Yanjun
