[SPDK] Re: For Dummies guide to setting up ramdisk NVMe/TCP target

How would I get my CPU mask on Linux? I'm running on a Virtualbox VM. I also used 0xf as a CPU mask and this was my output:

./build/bin/nvmf_tgt -m 0xf
[2020-10-14 09:47:07.650399] Starting SPDK v20.10-pre git sha1 779a6bdf8 / DPDK 20.08.0 initialization...
[2020-10-14 09:47:07.651075] [ DPDK EAL parameters: [2020-10-14 09:47:07.651092] nvmf [2020-10-14 09:47:07.651126] --no-shconf [2020-10-14 09:47:07.651132] -c 0xf [2020-10-14 09:47:07.651138] --log-level=lib.eal:6 [2020-10-14 09:47:07.651144] --log-level=lib.cryptodev:5 [2020-10-14 09:47:07.651150] --log-level=user1:6 [2020-10-14 09:47:07.651160] --iova-mode=pa [2020-10-14 09:47:07.651166] --base-virtaddr=0x200000000000 [2020-10-14 09:47:07.651172] --match-allocations [2020-10-14 09:47:07.651181] --file-prefix=spdk_pid702834 [2020-10-14 09:47:07.651187] ]
EAL: FATAL: Cannot use IOVA as 'PA' since physical addresses are not available
EAL: Cannot use IOVA as 'PA' since physical addresses are not available
[2020-10-14 09:47:07.659984] init.c: 577:spdk_env_init: *ERROR*: Failed to initialize DPDK
[2020-10-14 09:47:07.659999] app.c: 535:app_setup_env: *ERROR*: Unable to initialize SPDK env

Regards,

Eric Curtin
Software Engineer

Ovens Campus,
Cork,
Ireland

Dell EMC

Next planned absences: NA
________________________________
From: Rui Chang <Rui.Chang(a)arm.com>
Sent: Wednesday 14 October 2020 08:50
To: Curtin, Eric <Eric.Curtin(a)dell.com>
Cc: spdk(a)lists.01.org <spdk(a)lists.01.org>
Subject: RE: [SPDK] For Dummies guide to setting up ramdisk NVMe/TCP target


[EXTERNAL EMAIL]

Hi Eric



Refer to this page for HOWTO:

https://spdk.io/doc/nvmf.html



You said you want to run on one machine, suppose your machine’s IP is 8.8.8.6



  1.  Build your SPDK

git clone https://github.com/spdk/spdk spdk

cd spdk

git submodule update --init

./configure

make



  1.  Run:



Start target:

                ./build/bin/nvmf_tgt -m 0xf          (-m gives the CPU mask. Normally you can make it on the same CPU socket as network card to get better performance)



On another console, run rpc comamnds to do configuration:

./scripts/rpc.py nvmf_create_transport -t TCP      (there are lots of additional options you can use if you wish)

./scripts/rpc.py bdev_malloc_create -b Malloc0 200 512

./scripts/rpc.py nvmf_create_subsystem nqn.2016-06.io.spdk:cnode1 -a -s SPDK00000000000001 -d SPDK_Controller1

./scripts/rpc.py nvmf_subsystem_add_ns nqn.2016-06.io.spdk:cnode1 Malloc0

./scripts/rpc.py nvmf_subsystem_add_listener nqn.2016-06.io.spdk:cnode1 -t TCP -a 8.8.8.6 -s 4420                 (suppose 8.8.8.6 is the IP you want the target to listen on)



Run io:

./build/examples/perf -r 'trtype:TCP adrfam:IPv4 traddr:8.8.8.6 trsvcid:4420 subnqn:nqn.2016-06.io.spdk:cnode1'  -q 128 -o 4096  -w write -t 100 -c 0xf0  (-c give the cpu mask for perf tool, you’d better make it different with nvmf_tgt to get better performance)



Regards,

Rui





-----Original Message-----

From: eric.curtin(a)dell.com<mailto:eric.curtin(a)dell.com> <eric.curtin(a)dell.com<mailto:eric.curtin(a)dell.com>>

Sent: Thursday, October 1, 2020 3:23 PM

To: spdk(a)lists.01.org<mailto:spdk(a)lists.01.org>

Subject: [SPDK] For Dummies guide to setting up ramdisk NVMe/TCP target



Hi Guys,



I'm just getting started with SPDK and wanted to create a fake ramdisk NVMe/TCP target block device, just so I could simulate NVMe/TCP traffic on a single Linux instance for development purposes.



Anybody know how to set up a machine like this for NVMe/TCP development?

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