From: Lorenzo Bianconi <lorenzo@kernel.org>
To: netdev@vger.kernel.org
Cc: davem@davemloft.net, ilias.apalodimas@linaro.org,
brouer@redhat.com, lorenzo.bianconi@redhat.com,
mcroce@redhat.com
Subject: [PATCH v3 net-next 0/3] add DMA-sync-for-device capability to page_pool API
Date: Fri, 15 Nov 2019 21:01:36 +0200 [thread overview]
Message-ID: <cover.1573844190.git.lorenzo@kernel.org> (raw)
Introduce the possibility to sync DMA memory for device in the page_pool API.
This feature allows to sync proper DMA size and not always full buffer
(dma_sync_single_for_device can be very costly).
Please note DMA-sync-for-CPU is still device driver responsibility.
Relying on page_pool DMA sync mvneta driver improves XDP_DROP pps of
about 180Kpps:
- XDP_DROP DMA sync managed by mvneta driver: ~420Kpps
- XDP_DROP DMA sync managed by page_pool API: ~595Kpps
Changes since v2:
- rely on PP_FLAG_DMA_SYNC_DEV flag instead of dma_sync
Changes since v1:
- rename sync in dma_sync
- set dma_sync_size to 0xFFFFFFFF in page_pool_recycle_direct and
page_pool_put_page routines
- Improve documentation
Lorenzo Bianconi (3):
net: mvneta: rely on page_pool_recycle_direct in mvneta_run_xdp
net: page_pool: add the possibility to sync DMA memory for device
net: mvneta: get rid of huge dma sync in mvneta_rx_refill
drivers/net/ethernet/marvell/mvneta.c | 24 +++++++++------
include/net/page_pool.h | 21 ++++++++++----
net/core/page_pool.c | 42 +++++++++++++++++++++++----
3 files changed, 66 insertions(+), 21 deletions(-)
--
2.21.0
next reply other threads:[~2019-11-15 19:02 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-15 19:01 Lorenzo Bianconi [this message]
2019-11-15 19:01 ` [PATCH v3 net-next 1/3] net: mvneta: rely on page_pool_recycle_direct in mvneta_run_xdp Lorenzo Bianconi
2019-11-15 19:01 ` [PATCH v3 net-next 2/3] net: page_pool: add the possibility to sync DMA memory for device Lorenzo Bianconi
2019-11-15 19:35 ` Jonathan Lemon
2019-11-16 11:20 ` Jesper Dangaard Brouer
2019-11-16 11:36 ` Lorenzo Bianconi
2019-11-16 12:17 ` Jesper Dangaard Brouer
2019-11-16 14:17 ` Lorenzo Bianconi
2019-11-15 19:01 ` [PATCH v3 net-next 3/3] net: mvneta: get rid of huge dma sync in mvneta_rx_refill Lorenzo Bianconi
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