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<p class="MsoNormal"><span style="font-size:11.0pt">> On Wed, Nov 17, 2021 at 4:38 PM Elena Agostini <eagostini@nvidia.com> wrote:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> ><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> > > External email: Use caution opening links or attachments<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> ><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> > ><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> ><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> > ><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> ><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> > > On Wed, 17 Nov 2021 03:04:59 +0000<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> ><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> > > <eagostini@nvidia.com> wrote:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> ><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> > ><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> ><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> > > > From: Elena Agostini <eagostini@nvidia.com><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> ><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> > > ><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> ><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> > > > This patch introduces GPU memory in testpmd through the gpudev library.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> ><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> > > > Testpmd can be used for network benchmarks when using GPU memory<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> ><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> > > > instead of regular CPU memory to send and receive packets.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> ><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> > > > This option is currently limited to iofwd engine to ensure<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> ><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> > > > no workload is applied on packets not accessible from the CPU.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> ><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> > > ><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> ><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> > > > The options chose is --mbuf-size so buffer split feature across<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> ><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> > > > different mempools can be enabled.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> ><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> > > ><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> ><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> > > > Signed-off-by: Elena Agostini <eagostini@nvidia.com><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> ><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> > ><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> ><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> > > Won't this create a hard dependency of test-pmd on gpudev?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> ><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> > > I thought gpudev was supposed to be optional<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> ><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> ><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> ><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> > Sure, let me submit another patch to make it optional<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> Why to add yet another compile time macro everywhere in testpmd and<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> make hard to maintain?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> Adding iofwd kind of code is very simple to add test/test-gpudev and<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> all GPU specific options<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> can be added in test-gpudev. It also helps to review the patches as<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> test cases focus on<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">> each device class.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt">Test-gpudev is standalone unit test to ensure gpudev functions work correctly.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt">In testpmd instead, there is a connection between gpudev and the network.<o:p></o:p></span></p>
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