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<p class="MsoNormal"><span style="font-size:20.0pt;font-family:"Courier New"">Hi DPDK Community,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:20.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:20.0pt;font-family:"Courier New"">I am looking for clarification regarding LZ4 compression algorithm support within the DPDK CompressDev framework.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:20.0pt;font-family:"Courier New"">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.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:20.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:20.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:20.0pt;font-family:"Courier New"">My Questions:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:20.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<ol style="margin-top:0cm" start="1" type="1">
<li class="MsoNormal" style="mso-list:l0 level1 lfo1"><span style="font-size:20.0pt;font-family:"Courier New"">Is there an official, built-in software (SW) virtual PMD (compress_lz4) available in DPDK for LZ4 compression/decompression?<o:p></o:p></span></li><li class="MsoNormal" style="mso-list:l0 level1 lfo1"><span style="font-size:20.0pt;font-family:"Courier New"">If a native SW PMD does not exist, are there plans to introduce a reference software driver based on the liblz4 library?<o:p></o:p></span></li><li class="MsoNormal" style="mso-list:l0 level1 lfo1"><span style="font-size:20.0pt;font-family:"Courier New"">What is the recommended approach if I need to run LZ4 software compression over vdevs alongside other DPDK processing pipelines?<o:p></o:p></span></li></ol>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:20.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:20.0pt;font-family:"Courier New"">My Environment/Context:<o:p></o:p></span></p>
<ul style="margin-top:0cm" type="disc">
<li class="MsoNormal" style="mso-list:l1 level1 lfo2"><span style="font-size:20.0pt;font-family:"Courier New"">DPDK Version: DPDK25.11<o:p></o:p></span></li><li class="MsoNormal" style="mso-list:l1 level1 lfo2"><span style="font-size:20.0pt;font-family:"Courier New"">Operating System: Marvel CN106xx Octeon boards with ARM architecture.<o:p></o:p></span></li></ul>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:20.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:20.0pt;font-family:"Courier New"">cat /etc/os-release<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:20.0pt;font-family:"Courier New"">NAME=Buildroot<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:20.0pt;font-family:"Courier New"">VERSION=2020.02.3-ge935b06c8-dirty<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:20.0pt;font-family:"Courier New"">ID=buildroot<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:20.0pt;font-family:"Courier New"">VERSION_ID=2020.02.3<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:20.0pt;font-family:"Courier New"">PRETTY_NAME="Buildroot 2020.02.3"<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:20.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:20.0pt;font-family:"Courier New"">uname -a<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:20.0pt;font-family:"Courier New"">Linux oct2 5.4.210 #15 SMP PREEMPT Thu Aug 15 12:23:54 CST 2024 aarch64 GNU/Linux<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:20.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:20.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<ul style="margin-top:0cm" type="disc">
<li class="MsoNormal" style="mso-list:l1 level1 lfo2"><span style="font-size:20.0pt;font-family:"Courier New"">Target Use Case: We run user space TCP/IP Stack on Marvel CN106xx Octeon ARM boards, as part of FCIP Solutions.<o:p></o:p></span></li></ul>
<p class="MsoNormal" style="margin-left:18.0pt"><span style="font-size:20.0pt;font-family:"Courier New""> We need to enable LZ4 software compression support and DPDK don’t have software PMD support for LZ4 compression. <o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:18.0pt"><span style="font-size:20.0pt;font-family:"Courier New""> We are looking for support or any other approach to achieve this implementation.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:20.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:20.0pt;font-family:"Courier New"">Thanks and Regards<br>
Shravan S<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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