From: Mohsin Bashir <mohsin.bashr@gmail.com>
To: netdev@vger.kernel.org
Cc: kuba@kernel.org, alexanderduyck@fb.com, andrew+netdev@lunn.ch,
ast@kernel.org, bpf@vger.kernel.org, corbet@lwn.net,
daniel@iogearbox.net, davem@davemloft.net, edumazet@google.com,
hawk@kernel.org, horms@kernel.org, john.fastabend@gmail.com,
kernel-team@meta.com, mohsin.bashr@gmail.com, pabeni@redhat.com,
sdf@fomichev.me, vadim.fedorenko@linux.dev,
aleksander.lobakin@intel.com
Subject: [PATCH net-next V2 4/9] eth: fbnic: Prefetch packet headers on Rx
Date: Mon, 11 Aug 2025 14:54:57 -0700 [thread overview]
Message-ID: <20250811215457.1053688-1-mohsin.bashr@gmail.com> (raw)
In-Reply-To: <20250811211338.857992-1-mohsin.bashr@gmail.com>
Issue a prefetch for the start of the buffer on Rx to try to avoid cache
miss on packet headers.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Mohsin Bashir <mohsin.bashr@gmail.com>
---
drivers/net/ethernet/meta/fbnic/fbnic_txrx.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_txrx.c b/drivers/net/ethernet/meta/fbnic/fbnic_txrx.c
index 819234aa5bd4..7945f695b6f2 100644
--- a/drivers/net/ethernet/meta/fbnic/fbnic_txrx.c
+++ b/drivers/net/ethernet/meta/fbnic/fbnic_txrx.c
@@ -888,7 +888,7 @@ static void fbnic_pkt_prepare(struct fbnic_napi_vector *nv, u64 rcd,
/* Build frame around buffer */
hdr_start = page_address(page) + hdr_pg_start;
-
+ net_prefetch(pkt->buff.data);
xdp_prepare_buff(&pkt->buff, hdr_start, headroom,
len - FBNIC_RX_PAD, true);
--
2.47.3
next prev parent reply other threads:[~2025-08-11 21:55 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-11 21:13 [PATCH net-next V2 0/9] eth: fbnic: Add XDP support for fbnic Mohsin Bashir
2025-08-11 21:13 ` [PATCH net-next V2 1/9] eth: fbnic: Add support for HDS configuration Mohsin Bashir
2025-08-12 10:47 ` Vadim Fedorenko
2025-08-12 13:52 ` Mohsin Bashir
2025-08-12 14:41 ` Jakub Kicinski
2025-08-11 21:13 ` [PATCH net-next V2 2/9] eth: fbnic: Update Headroom Mohsin Bashir
2025-08-11 21:49 ` [PATCH net-next V2 3/9] eth: fbnic: Use shinfo to track frags state on Rx Mohsin Bashir
2025-08-11 21:54 ` Mohsin Bashir [this message]
2025-08-11 21:55 ` [PATCH net-next V2 5/9] eth: fbnic: Add XDP pass, drop, abort support Mohsin Bashir
2025-08-11 21:55 ` [PATCH net-next V2 6/9] eth: fbnic: Add support for XDP queues Mohsin Bashir
2025-08-11 21:56 ` [PATCH net-next V2 7/9] eth: fbnic: Add support for XDP_TX action Mohsin Bashir
2025-08-11 21:56 ` [PATCH net-next V2 8/9] eth: fbnic: Collect packet statistics for XDP Mohsin Bashir
2025-08-11 21:57 ` [PATCH net-next V2 9/9] eth: fbnic: Report XDP stats via ethtool Mohsin Bashir
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