Re: [dpdk-dev] [RFC 0/2] TAP TSO Implementation

[Ophir Munk <ophirmu@mellanox.com>]

Patch sent for this release.

> -----Original Message-----
> From: Ferruh Yigit [mailto:ferruh.yigit@intel.com]
> Sent: Monday, April 09, 2018 7:39 PM
> To: Ophir Munk <ophirmu@mellanox.com>; dev@dpdk.org; Pascal Mazon
> <pascal.mazon@6wind.com>
> Cc: Thomas Monjalon <thomas@monjalon.net>; Olga Shern
> <olgas@mellanox.com>
> Subject: Re: [dpdk-dev] [RFC 0/2] TAP TSO Implementation
> 
> On 3/9/2018 9:10 PM, Ophir Munk wrote:
> > This RFC suggests TAP TSO (TSP segmentation offload) implementation in
> SW.
> > It uses dpdk library rte_gso which is also used by testpmd.
> > Dpdk rte_gso library segments large TCP payloads (e.g. 64K bytes) into
> > smaller MTU size buffers.
> > By supporting TSO offload capability in software a TAP device can be
> > used as a failsafe sub device and be paired with another PCI device
> > which supports TSO capability in HW.
> >
> > This RFC includes 2 commits:
> > 1. Calculation of IP/TCP/UDP checksums for multi segments packets.
> > Previously checksum offload was skipped if the number of packet
> > segments was greater than 1.
> > This commit removes this limitation. It is required before supporting
> > TAP TSO since the generated small TCP packets may be composed by
> > themselves by more than one segment.
> > 2. Core TAP TSO implementation: calling rte_gso_segment() segments
> > large TCP packets.
> > To be added: creation of a small private mbuf pool in TAP required by
> librte_gso.
> > The number of buffers will be 64 - each of 128 bytes length.
> >
> > Ophir Munk (2):
> >   net/tap: calculate checksum for multi segs packets
> >   net/tap: implement TAP TSO
> 
> This is an RFC, and V1 not sent for the patch, is this still valid for this release
> or should we push into next one?

V1 was sent for this release: 
https://dpdk.org/dev/patchwork/patch/37757/