On Wed, 14 Apr 2021 11:05:50 -0700 Saeed Mahameed wrote: > From: Parav Pandit <pa...@nvidia.com> > > Currently each packet inserted in eswitch is tagged with a internal > metadata to indicate source vport. Metadata tagging is not always > needed. Metadata insertion is needed for multi-port RoCE, failover > between representors and stacked devices. In many other cases, > metadata enablement is not needed. > > Metadata insertion slows down the packet processing rate of the E-switch > when it is in switchdev mode. > > Below table show performance gain with metadata disabled for VXLAN > offload rules in both SMFS and DMFS steering mode on ConnectX-5 device. > > ---------------------------------------------- > | steering | metadata | pkt size | rx pps | > | mode | | | (million) | > ---------------------------------------------- > | smfs | disabled | 128Bytes | 42 | > ---------------------------------------------- > | smfs | enabled | 128Bytes | 36 | > ---------------------------------------------- > | dmfs | disabled | 128Bytes | 42 | > ---------------------------------------------- > | dmfs | enabled | 128Bytes | 36 | > ---------------------------------------------- > > Hence, allow user to disable metadata using driver specific devlink > parameter. Metadata setting of the eswitch is applicable only for the > switchdev mode. > > Example to show and disable metadata before changing eswitch mode: > $ devlink dev param show pci/0000:06:00.0 name esw_port_metadata > pci/0000:06:00.0: > name esw_port_metadata type driver-specific > values: > cmode runtime value true > > $ devlink dev param set pci/0000:06:00.0 \ > name esw_port_metadata value false cmode runtime > > $ devlink dev eswitch set pci/0000:06:00.0 mode switchdev > > Signed-off-by: Parav Pandit <pa...@nvidia.com> > Reviewed-by: Roi Dayan <r...@nvidia.com> > Reviewed-by: Vu Pham <vuhu...@nvidia.com> > Signed-off-by: Saeed Mahameed <sae...@nvidia.com>
Acked-by: Jakub Kicinski <k...@kernel.org>
