This series adds the missing flow for enabling the LRO in the ethdev and
adds a support for this feature in the ixgbe PMD. There is a big hope that this
initiative is going to be picked up by some Intel developer that would add the
LRO support
to other Intel PMDs. ;)
The series starts with some cleanup work in the code the final patch (the
actual adding of
the LRO support) is going to touch/use/change. There are still quite a few
issues in the ixgbe
PMD code left but they have to be a matter of a different series and I've left
a few "TODO"
remarks in the code.
The LRO ("RSC" in Intel's context) PMD completion handling code follows the
same design as the
corresponding Linux and FreeBSD implementation: pass the aggregation's cluster
HEAD buffer to
the NEXTP entry of the software ring till EOP is met.
HW configuration follows the corresponding specs: this feature is supported
only by x540 and
82599 PF devices.
The feature has been tested with seastar TCP stack with the following
configuration on Tx side:
- MTU: 400B
- 100 concurrent TCP connections.
The results were:
- Without LRO: total throughput: 0.12Gbps, coefficient of variance: 1.41%
- With LRO: total throughput: 8.21Gbps, coefficient of variance: 0.59%
Vlad Zolotarov (5):
ixgbe: Cleanups
ixgbe: Bug fix: Properly configure Rx CRC stripping for x540 devices
ixgbe: Code refactoring
common_linuxapp: Added CONFIG_RTE_ETHDEV_LRO_SUPPORT option
ixgbe: Add LRO support
config/common_linuxapp | 1 +
lib/librte_ether/rte_ethdev.h | 7 +-
lib/librte_pmd_ixgbe/ixgbe_ethdev.c | 17 +
lib/librte_pmd_ixgbe/ixgbe_ethdev.h | 5 +
lib/librte_pmd_ixgbe/ixgbe_rxtx.c | 724 ++++++++++++++++++++++++++++++++----
lib/librte_pmd_ixgbe/ixgbe_rxtx.h | 6 +
6 files changed, 687 insertions(+), 73 deletions(-)
--
2.1.0
