Re: [PATCH 0/6] Enable P2PDMA in Userspace RDMA

Martin Oliveira
2024-06-06T21:32:29Z

On 2024-06-06 02:53, Zhu Yanjun wrote:
> On 05.06.24 21:29, Martin Oliveira wrote:
>> This patch series enables P2PDMA memory to be used in userspace RDMA
>> transfers. With this series, P2PDMA memory mmaped into userspace (ie.
>> only NVMe CMBs, at the moment) can then be used with ibv_reg_mr() (or
>> similar) interfaces. This can be tested by passing a sysfs p2pmem
>> allocator to the --mmap flag of the perftest tools.
>
> Do you mean the following --mmap flag?
> "
> --mmap=file  Use an mmap'd file as the buffer for testing P2P transfers.
> "

Yes

> I am interested in this. Can you provide the full steps to make tests
> with this patch series
First start the server with:

ib_read_bw

Then run a client with something like this:

ib_read_bw --mmap /sys/bus/pci/devices/0000\:c5\:00.0/p2pmem/allocate <host>

Martin