mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-05-05 18:13:26 -04:00
f0ac620946
Currently, when VFs are created, two flow tables are added for the eswitch: the "fdb" table, which contains rules for each VF and the "vepa_fdb" table. In the default VEB mode, the vepa_fdb table is empty. When switching to VEPA mode, flow steering rules are added to vepa_fdb. Even though the vepa_fdb table is empty in VEB mode, its presence adds some cost to packet processing. In some workloads, this leads to drops which are reported by the rx_discards_phy ethtool counter. In order to improve performance, only create vepa_fdb when in VEPA mode. Tests were done on a ConnectX-6 Lx adapter forwarding 64B packets between both ports using dpdk-testpmd. Numbers are Rx-pps for each port, as reported by testpmd. Without changes: traffic to unknown mac testpmd on PF numvfs=0,0 35257998,35264499 numvfs=1,1 24590124,24590888 testpmd on VF with numvfs=1,1 20434338,20434887 traffic to VF mac testpmd on VF with numvfs=1,1 30341014,30340749 With changes: traffic to unknown mac testpmd on PF numvfs=0,0 35404361,35383378 numvfs=1,1 29801247,29790757 testpmd on VF with numvfs=1,1 24310435,24309084 traffic to VF mac testpmd on VF with numvfs=1,1 34811436,34781706 Signed-off-by: Benjamin Poirier <bpoirier@nvidia.com> Reviewed-by: Cosmin Ratiu <cratiu@nvidia.com> Reviewed-by: Saeed Mahameed <saeedm@nvidia.com> Signed-off-by: Tariq Toukan <tariqt@nvidia.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.