topic Low DPDK performance in Embedded Intel® Core™ Processors

Low DPDK performance

AATLI — Thu, 21 Jan 2016 12:45:47 GMT

I'm trying to measure the throughput of DPDK for physical ports (using 64-byte udp packets), but it seems very low. My test setup is shown below:

+─────────────────────────────+

│ 82599ES 10-Gigabit SFI/SFP+ │

+───+────+──────────+────+────+

│ p0 │ │ p1 │

+────+ +────+

^ ^

| |

v v

+────+ +────+

│ p0 │ │ p1 │

+───+────+──────────+────+────+

│ NAPATECH Adapter - 2 port │

+─────────────────────────────+

I isolated cores (master and logical cores on hyper-threading) from Linux kernel according to the output of dpdk/tools/cpu_layout.p, iommu is set to pt, intel_iommu is off and 1G hugepages allocated for numa nodes as follows;

$ cat /sys/devices/system/node/node*/meminfo | fgrep Huge

Node 0 AnonHugePages: 137216 kB

Node 0 HugePages_Total: 3

Node 0 HugePages_Free: 2

Node 0 HugePages_Surp: 0

Node 1 AnonHugePages: 227328 kB

Node 1 HugePages_Total: 2

Node 1 HugePages_Free: 1

Node 1 HugePages_Surp: 0

$ ./cpu_layout.py

cores = [0, 1, 2, 8, 9, 10]

sockets = [0, 1]

Socket 0 Socket 1

-------- --------

Core 0 [0, 12] [6, 18]

Core 1 [1, 13] [7, 19]

Core 2 [2, 14] [8, 20]

Core 8 [3, 15] [9, 21]

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Re: Low DPDK performance

CarlosAM_INTEL — Thu, 21 Jan 2016 15:08:52 GMT

Hello avatli,

Thank you for contacting the Intel Embedded Community.

We suggest you verify that the mentioned test fulfills with the requirements stated at the http://dpdk.org/doc/dts/gsg/index.html Getting Started Guide — DPDK Test Suite documentation.

It is important to let you know that your DPDK consultations will be further answered using the email addresses listed at the http://dpdk.org/ml DPDK Mailing Lists.

Please let us know if this information is useful to you.

Best Regards,

Carlos_A.

Re: Low DPDK performance

AATLI — Fri, 05 Feb 2016 10:01:34 GMT

Hello

No one has answered the question at the DPDK Mailing Lists. We still have the performance problem. I could not reach your benchmark results, especially for small packets.

Re: Low DPDK performance

CarlosAM_INTEL — Fri, 12 Feb 2016 19:39:22 GMT

Hello avatli,

Thanks for your update.

We have the following suggestions to solve this inconvenience:

1) Please add --numa knob to ./testpmd command line.

2) Please increase the number of descriptors (try default values (no –rxd –txd flags, and rxd=256, txd=512/1024).

3) Also, it would be helpful to see the output of 'lspci –vt'.

Please let us know if this information is useful to you.

Best Regards,

Carlos_A.

Re: Low DPDK performance

AATLI — Mon, 15 Feb 2016 09:50:15 GMT

Hi Carlos

Unfortunately still the same low performance, here is my output;

argela@argela-HP-Z800-Workstation:~/ovs_dpdk/dpdk/app/test-pmd/build/app$ lspci -vt

-+-[0000:7f]-+-00.0 Intel Corporation Xeon 5600 Series QuickPath Architecture Generic Non-core Registers

| +-00.1 Intel Corporation Xeon 5600 Series QuickPath Architecture System Address Decoder

| +-02.0 Intel Corporation Xeon 5600 Series QPI Link 0

| +-02.1 Intel Corporation Xeon 5600 Series QPI Physical 0

| +-02.2 Intel Corporation Xeon 5600 Series Mirror Port Link 0

| +-02.3 Intel Corporation Xeon 5600 Series Mirror Port Link 1

| +-02.4 Intel Corporation Xeon 5600 Series QPI Link 1

| +-02.5 Intel Corporation Xeon 5600 Series QPI Physical 1

| +-03.0 Intel Corporation Xeon 5600 Series Integrated Memory Controller Registers

| +-03.1 Intel Corporation Xeon 5600 Series Integrated Memory Controller Target Address Decoder

| +-03.2 Intel Corporation Xeon 5600 Series Integrated Memory Controller RAS Registers

| +-03.4 Intel Corporation Xeon 5600 Series Integrated Memory Controller Test Registers

| +-04.0 Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 0 Control

| +-04.1 Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 0 Address

| +-04.2 Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 0 Rank

| +-04.3 Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 0 Thermal Control

| +-05.0 Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 1 Control

| +-05.1 Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 1 Address

| +-05.2 Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 1 Rank

| +-05.3 Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 1 Thermal Control

| +-06.0 Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 2 Control

| +-06.1 Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 2 Address

| +-06.2 Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 2 Rank

| \-06.3 Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 2 Thermal Control

+-[0000:7e]-+-00.0 Intel Corporation Xeon 5600 Series QuickPath Architecture Generic Non-core Registers