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(parent: 2b2706a) | patch
net: mvneta: avoid possible cache misses in mvneta_rx_swbm
authorLorenzo Bianconi <lorenzo@kernel.org>
Tue, 29 Sep 2020 21:58:57 +0000 (23:58 +0200)
committerDavid S. Miller <davem@davemloft.net>
Wed, 30 Sep 2020 01:10:07 +0000 (18:10 -0700)
commit879456bedbe54f2d38b15c21dc5e3c30232b53e1
tree1c39b06c8314cb7b6d89d00b0f33acaa22c3f861tree | snapshot
parent2b2706aaaefee49ba0030bc679865db178e89e11commit | diff
net: mvneta: avoid possible cache misses in mvneta_rx_swbm

Do not use rx_desc pointers if possible since rx descriptors are stored in
uncached memory and dereferencing rx_desc pointers generate extra loads.
This patch improves XDP_DROP performance of ~ 110Kpps (700Kpps vs 590Kpps)
on Marvell Espressobin

Analyzed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/ethernet/marvell/mvneta.c diff | blob | history
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