Hi, > -----Original Message----- > From: Viacheslav Ovsiienko <[email protected]> > Sent: Thursday, February 4, 2021 2:04 PM > To: [email protected] > Cc: Raslan Darawsheh <[email protected]>; Matan Azrad > <[email protected]>; Ori Kam <[email protected]>; NBU-Contact-Thomas > Monjalon <[email protected]>; [email protected] > Subject: [PATCH] net/mlx5: fix Tx queue size created with DevX > > The number of descriptors specified for queue creation > implies the queue should be able to contain the specified > amount of packets being sent. Typically one packet takes > one queue descriptor (WQE) to be handled. If there is inline > data option enabled one packet might require more WQEs to > embrace the inline data and the overall queue size (the > number of queue descriptors) should be adjusted accordingly. > > In mlx5 PMD the queues can be created either via Verbs, using > the rdma-core library or via DevX as direct kernel/firmware call. > The rdma-core does queue size adjustment internally, depending on > TSO and inline setting. The DevX approach missed this point. > This caused the queue size discrepancy and performance variations. > > The patch adjusts the Tx queue size for the DexV approach > in the same as it is done in rdma-core implementation. > > Fixes: 86d259cec852 ("net/mlx5: separate Tx queue object creations") > Cc: [email protected] > > Signed-off-by: Viacheslav Ovsiienko <[email protected]> Patch applied to next-net-mlx,
Kindest regards, Raslan Darawsheh
