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<p class="MsoNormal">Hi Yaron<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Maybe the caching takes PCI bandwidth?<o:p></o:p></p>
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<p class="MsoNormal">Matan<o:p></o:p></p>
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<p class="MsoNormal"><b>From:</b> Yaron Illouz <yaroni@radcom.com> <br>
<b>Sent:</b> Wednesday, January 19, 2022 4:27 PM<br>
<b>To:</b> dev@dpdk.org<br>
<b>Cc:</b> Matan Azrad <matan@nvidia.com><br>
<b>Subject:</b> mellanox connect x 5 drops when cache full<o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-size:7.5pt;font-family:"Verdana",sans-serif;color:black">External email: Use caution opening links or attachments</span></b><span style="font-size:7.5pt;font-family:"Verdana",sans-serif;color:black">
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<p class="MsoNormal">Hi <o:p></o:p></p>
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<p class="MsoNormal">I am using multiqueue with RSS to read from MT27800 Family [ConnectX-5] 1017<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">My application receive traffic, and write some data to disk. As a result I/O write is cached in linux memory.<o:p></o:p></p>
<p class="MsoNormal">When the server memory is completely cache ( I know it is still available) I start seeing drops at nic.
<o:p></o:p></p>
<p class="MsoNormal">If I delete the data from disk every minute the cached memory is released to free and and no drops at nic.<o:p></o:p></p>
<p class="MsoNormal">How can I avoid the drops at nic?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="text-indent:.5in"> total used free shared buff/cache available<o:p></o:p></p>
<p class="MsoNormal">Mem: 125G 77G 325M 29M 47G 47G<o:p></o:p></p>
<p class="MsoNormal">Swap: 8.0G 256K 8.0G<o:p></o:p></p>
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