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* [dpdk-dev] [PATCH 0/4] net/mlx5: add large packet size support to MPRQ
@ 2020-03-31 21:52 Alexander Kozyrev
  2020-03-31 21:52 ` [dpdk-dev] [PATCH 1/4] net/mlx5: add a devarg to specify MPRQ stride size Alexander Kozyrev
                   ` (5 more replies)
  0 siblings, 6 replies; 28+ messages in thread
From: Alexander Kozyrev @ 2020-03-31 21:52 UTC (permalink / raw)
  To: dev; +Cc: rasland, matan, viacheslavo, ferruh.yigit, thomas

In order to support the 9K MTU the MPRQ feature should be updated
to allow a packet to take more than one stride (single linear buffer).
Receiving a packet into multiple adjacent strides should be implemented.
The reason preventing the packet to be received into multiple strides is
that the data buffer must be preceded with some HEAD_ROOM space.
In the current implementation the HEAD_ROOM space is borrowed by the PMD
from the tail of the preceding stride. If packet takes multiple strides
the tail of stride may be overwritten with a packet data and the memory
can't be borrowed to provide the HEAD_ROOM space for the next packet.
Special care is needed to prevent the HEAD_ROOM corruption as such:
- copy a whole packet into a separate memory buffer if scatter is off
- copy an overlapping data only and craft a multi-segment mbuf otherwise
After multi-stride support for packets receiving is in place it is
possible to reduce the stride size for more efficient memory utilization.
Introduce the mprq_log_stride_size device parameter to configure
a stride size for MPRQ. Default stride size is set to 2048 bytes.

Alexander Kozyrev (4):
  net/mlx5: add a devarg to specify MPRQ stride size
  net/mlx5: enable MPRQ multi-stride operations
  doc: add a decsription for MPRQ stride size devarg
  net/mlx5: add multi-segment packets in MPRQ mode

 doc/guides/nics/mlx5.rst               |   9 +++
 doc/guides/rel_notes/release_20_05.rst |   1 +
 drivers/net/mlx5/mlx5.c                |  34 ++++++++--
 drivers/net/mlx5/mlx5.h                |   1 +
 drivers/net/mlx5/mlx5_defs.h           |   3 +
 drivers/net/mlx5/mlx5_rxq.c            |  43 +++++--------
 drivers/net/mlx5/mlx5_rxtx.c           | 113 +++++++++++++++++++--------------
 drivers/net/mlx5/mlx5_rxtx.h           |   2 +-
 8 files changed, 125 insertions(+), 81 deletions(-)

-- 
1.8.3.1


^ permalink raw reply	[flat|nested] 28+ messages in thread

end of thread, other threads:[~2020-04-15 15:52 UTC | newest]

Thread overview: 28+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-03-31 21:52 [dpdk-dev] [PATCH 0/4] net/mlx5: add large packet size support to MPRQ Alexander Kozyrev
2020-03-31 21:52 ` [dpdk-dev] [PATCH 1/4] net/mlx5: add a devarg to specify MPRQ stride size Alexander Kozyrev
2020-04-02 10:00   ` Slava Ovsiienko
2020-03-31 21:52 ` [dpdk-dev] [PATCH 2/4] net/mlx5: enable MPRQ multi-stride operations Alexander Kozyrev
2020-04-02 10:01   ` Slava Ovsiienko
2020-03-31 21:52 ` [dpdk-dev] [PATCH 3/4] doc: add a decsription for MPRQ stride size devarg Alexander Kozyrev
2020-03-31 21:52 ` [dpdk-dev] [PATCH 4/4] net/mlx5: add multi-segment packets in MPRQ mode Alexander Kozyrev
2020-04-02 10:02   ` Slava Ovsiienko
2020-04-02 18:11 ` [dpdk-dev] [PATCH 0/3] net/mlx5: add large packet size support to MPRQ Alexander Kozyrev
2020-04-02 18:11   ` [dpdk-dev] [PATCH 1/3] net/mlx5: add a devarg to specify MPRQ stride size Alexander Kozyrev
2020-04-02 18:11   ` [dpdk-dev] [PATCH 2/3] net/mlx5: enable MPRQ multi-stride operations Alexander Kozyrev
2020-04-02 18:11   ` [dpdk-dev] [PATCH 3/3] net/mlx5: add multi-segment packets in MPRQ mode Alexander Kozyrev
2020-04-09 22:23   ` [dpdk-dev] [PATCH v4 0/3] net/mlx5: add large packet size support to MPRQ Alexander Kozyrev
2020-04-09 22:23     ` [dpdk-dev] [PATCH v4 1/3] net/mlx5: add a devarg to specify MPRQ stride size Alexander Kozyrev
2020-04-14 11:42       ` Ferruh Yigit
2020-04-14 12:52         ` Thomas Monjalon
2020-04-15 11:01           ` Ferruh Yigit
2020-04-15 11:25             ` Luca Boccassi
2020-04-15 15:34               ` Alexander Kozyrev
2020-04-15 15:52                 ` [dpdk-dev] [dpdk-stable] " Luca Boccassi
2020-04-09 22:23     ` [dpdk-dev] [PATCH v4 2/3] net/mlx5: enable MPRQ multi-stride operations Alexander Kozyrev
2020-04-09 22:23     ` [dpdk-dev] [PATCH v4 3/3] net/mlx5: add multi-segment packets in MPRQ mode Alexander Kozyrev
2020-04-10 14:01     ` [dpdk-dev] [PATCH v4 0/3] net/mlx5: add large packet size support to MPRQ Matan Azrad
2020-04-13 10:57     ` Raslan Darawsheh
2020-04-09 21:24 ` [dpdk-dev] [PATCH v3 " Alexander Kozyrev
2020-04-09 21:24   ` [dpdk-dev] [PATCH v3 1/3] net/mlx5: add a devarg to specify MPRQ stride size Alexander Kozyrev
2020-04-09 21:24   ` [dpdk-dev] [PATCH v3 2/3] net/mlx5: enable MPRQ multi-stride operations Alexander Kozyrev
2020-04-09 21:24   ` [dpdk-dev] [PATCH v3 3/3] net/mlx5: add multi-segment packets in MPRQ mode Alexander Kozyrev

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