Subject: [Questions] LZ4 software compression PMD support in DPDK

[Shravan S (shrraj)]

Hi @Thomas Monjalon<mailto:thomas at monjalon.net>



   Thanks for the confirmation.



Thanks and Regards

   Shravan S



-----Original Message-----
From: Thomas Monjalon <thomas at monjalon.net>
Sent: Saturday, July 11, 2026 7:55 PM
To: Shravan S (shrraj) <shrraj at cisco.com>
Cc: users at dpdk.org; Fan Zhang <fanzhang.oss at gmail.com>; Ashish Gupta <ashish.gupta at marvell.com>; Pablo de Lara <pablo.de.lara.guarch at intel.com>
Subject: Re: Subject: [Questions] LZ4 software compression PMD support in DPDK



Hello,



11/07/2026 04:38, Shravan S (shrraj):

> Hi DPDK Community,

>

> I am looking for clarification regarding LZ4 compression algorithm support within the DPDK CompressDev framework.

> While looking at the rte_comp.h API, I see references to rte_comp_lz4_params, and the dpdk-test-compress-perf tool lists --algo lz4 as an eligible flag. However, looking through the available software virtual devices (like the ZLIB PMD or ISA-L PMD), they primarily target DEFLATE.



The drivers support is written in this table:

https://doc.dpdk.org/guides/compressdevs/overview.html



As you can see, only mlx5 supports LZ4 for its hardware.



> My Questions:

>

>

>   1.  Is there an official, built-in software (SW) virtual PMD (compress_lz4) available in DPDK for LZ4 compression/decompression?

>   2.  If a native SW PMD does not exist, are there plans to introduce a reference software driver based on the liblz4 library?

>   3.  What is the recommended approach if I need to run LZ4 software compression over vdevs alongside other DPDK processing pipelines?



There is no plan regarding LZ4 in software, but you are welcome to propose a solution.





> My Environment/Context:

>

>   *   DPDK Version: DPDK25.11

>   *   Operating System:  Marvel CN106xx Octeon boards with ARM architecture.

>

> cat /etc/os-release

> NAME=Buildroot

> VERSION=2020.02.3-ge935b06c8-dirty

> ID=buildroot

> VERSION_ID=2020.02.3

> PRETTY_NAME="Buildroot 2020.02.3"

>

> uname -a

> Linux oct2 5.4.210 #15 SMP PREEMPT Thu Aug 15 12:23:54 CST 2024 aarch64 GNU/Linux

>

>

>

>   *   Target Use Case: We run user space TCP/IP Stack on Marvel CN106xx Octeon ARM boards, as part of FCIP Solutions.

>                  We need to enable LZ4 software compression support and DPDK don't have software PMD support for LZ4 compression.

>                  We are looking for support or any other approach to achieve this implementation.

>

> Thanks and Regards

>     Shravan S






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