[SPDK] Re: Why two perf processes can't scale out?

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These are two separate SPDK processes (nvmf_perf) and running on different =
cores.

Each SPDK process will create its own qpair and have its own qpair ID. This=
 resource is visible only for its own SPDK process.

-----Original Message-----
From: 645505358(a)qq.com <645505358(a)qq.com> =

Sent: Tuesday, May 10, 2022 23:44
To: spdk(a)lists.01.org
Subject: [SPDK] Re: Why two perf processes can't scale out?

Hi,
I have another question.
I run two perf processes with the command line:
"./build/examples/nvmf_perf -w write -q 1  -o 131072 -t 60 -r "trtype:RDMA =
adrfam:IPv4 traddr:192.168.2.86 trsvcid:5120 subnqn:nqn.2016-06.io.spdk:cno=
de2" and designate lcore with -c 0x5 in the second process.
I found that both of them use the same qpair.
Sepcifically, I print out the qpair ID in function nvme_ctrlr_create_io_qpa=
ir (i.e., qid =3D spdk_nvme_ctrlr_alloc_qid(ctrlr) ).
Both of them use the qpair with ID equal to 0.
So, why do they use the same qpair ? =

Will this cause resource competition?

Thanks.
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