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mlxsw: pci: Optimize data buffer access

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Before accessing data buffer, call net_prefetch() to load it into the
cache. This change improves driver performance, CPU can handle about
7.1% more packets per second.

Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/1fa07c510890866a6f201163ab7e78890ba28b3b.1718709196.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Amit Cohen 2024-06-18 13:34:44 +02:00 committed by Jakub Kicinski
parent b5b60bb491
commit 0f3cd437a1
1 changed files with 1 additions and 0 deletions
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drivers/net/ethernet/mellanox/mlxsw/pci.c
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@ -396,6 +396,7 @@ static struct sk_buff *mlxsw_pci_rdq_build_skb(struct page *page,
unsigned int allocated_size;
struct sk_buff *skb;
net_prefetch(data);
allocated_size = page_size(page);
skb = napi_build_skb(data, allocated_size);
if (unlikely(!skb))