https://bugs.dpdk.org/show_bug.cgi?id=487
Bug ID: 487
Summary: Worse performance with DPDK driver when MTU is set to
2022 or less
Product: DPDK
Version: 20.02
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: Normal
Component: core
Assignee: dev@dpdk.org
Reporter: vrpo...@cisco.com
Target Milestone: ---
This is a copy of issue VPP-1876 [0], opened against VPP project. See the
description and comments there (or let me know and I will copy them here).
Performance of VPP (NIC: Intel-xxv710) depends on MTU value set, but only when
DPDK driver is used. That does not prove the bug is in DPDK, but it is
suspicious enough for me to open this Bug against DPDK.
I tried to reproduce the behavior using other DPDK applications, but they tend
to hit the line rate regardless of MTU. Is there a DPDK application that
intentionally wastes some cycles, so I can try to confirm its performance
depends on MTU value?
[0] https://jira.fd.io/browse/VPP-1876
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