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<p class="MsoNormal">I think I just answered my own question – too large a transfer size is the cause.<o:p></o:p></p>
<p class="MsoNormal"><br>
Daniel<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:12.0pt;color:black">From:
</span></b><span style="font-size:12.0pt;color:black">Daniel Waddington <Daniel.Waddington@ibm.com><br>
<b>Date: </b>Tuesday, June 14, 2022 at 3:17 PM<br>
<b>To: </b>users@dpdk.org <users@dpdk.org><br>
<b>Subject: </b>[EXTERNAL] IOAT channel halting unexpectedly<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-line-height-alt:.75pt"><span style="font-size:1.0pt;color:white">Hi DPDK folks, I’m trying to use IOAT (rte_dma_copy) on Skylake. I can do a single submit and completion OK. When I try to do more (> 3 as it happens), the IOAT
reports: “ioat_completed(): Device HALTED and could not be recovered”. ˛ ˛ ˛ ˛ ˛
<o:p></o:p></span></p>
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<p class="MsoNormal">Hi DPDK folks,<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">I’m trying to use IOAT (rte_dma_copy) on Skylake. I can do a single submit and completion OK. When I try to do more (> 3 as it happens), the IOAT reports:<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">“ioat_completed(): Device HALTED and could not be recovered”.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">From the rte_dma_dump I see the channel status has entered HALTED and the completions stop.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">My question is, what can cause the channel to halt? (e.g. bad src or dst address). Any hints on how I might debug this?<o:p></o:p></p>
<p class="MsoNormal">Also, I have to reboot to get it out of this state. Re-loading drivers doesn’t seem to help – any other way?<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Daniel<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
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