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From: Filip Janiszewski <contact@filipjaniszewski.com>
To: "users@dpdk.org" <users@dpdk.org>
Subject: [dpdk-users] MLX ConnectX-4 Discarding packets
Date: Fri, 10 Sep 2021 15:34:20 +0200
Message-ID: <e3867350-42a9-e74e-7fd3-a239797514ac@filipjaniszewski.com> (raw)

Hi,

I've switched a 100Gbe MLX ConnectX-4 card from an Intel Xeon server to
an AMD EPYC server (running 75F3 CPU, 256GiB of RAM and PCIe4 lanes),
and using the same capture software we can't get any faster than 10Gbps,
when exceeding that speed regardless of the amount of queues configured
the rx_discards_phy counter starts to raise and packets are lost in huge
amounts.

On the Xeon machine, I was able to get easily to 50Gbps with 4 queues.

Is there any specific DPDK configuration that we might want to setup for
those AMD servers? The software is DPDK based so I wonder if some build
option is missing somewhere.

What else I might want to look for to investigate this issue?

Thanks

-- 
BR, Filip
+48 666 369 823

             reply	other threads:[~2021-09-10 13:34 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-10 13:34 Filip Janiszewski [this message]
2021-09-11  8:56 ` Filip Janiszewski
2021-09-11 10:20   ` Steffen Weise
2021-09-11 14:19     ` Filip Janiszewski
2021-09-11 14:34       ` Filip Janiszewski
2021-09-12  9:32         ` Filip Janiszewski
2021-09-29 10:43           ` Thomas Monjalon

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