From: Toshiaki Makita <toshiaki.makita1@gmail.com>
To: Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Martin KaFai Lau <kafai@fb.com>, Song Liu <songliubraving@fb.com>,
Yonghong Song <yhs@fb.com>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <jakub.kicinski@netronome.com>,
Jesper Dangaard Brouer <hawk@kernel.org>,
John Fastabend <john.fastabend@gmail.com>,
Jamal Hadi Salim <jhs@mojatatu.com>,
Cong Wang <xiyou.wangcong@gmail.com>,
Jiri Pirko <jiri@resnulli.us>
Cc: Toshiaki Makita <toshiaki.makita1@gmail.com>,
netdev@vger.kernel.org, bpf@vger.kernel.org,
William Tu <u9012063@gmail.com>
Subject: [RFC PATCH bpf-next 13/14] i40e: prefetch xdp->data before running XDP prog
Date: Tue, 13 Aug 2019 21:05:57 +0900 [thread overview]
Message-ID: <20190813120558.6151-14-toshiaki.makita1@gmail.com> (raw)
In-Reply-To: <20190813120558.6151-1-toshiaki.makita1@gmail.com>
XDP progs are likely to read/write xdp->data.
This improves the performance of xdp_flow.
This is included in this series just to demonstrate to what extent
xdp_flow performance can increase.
Signed-off-by: Toshiaki Makita <toshiaki.makita1@gmail.com>
---
drivers/net/ethernet/intel/i40e/i40e_txrx.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
index f162252..ea775ae 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
@@ -2207,6 +2207,7 @@ static struct sk_buff *i40e_run_xdp(struct i40e_ring *rx_ring,
if (!xdp_prog)
goto xdp_out;
+ prefetchw(xdp->data);
prefetchw(xdp->data_hard_start); /* xdp_frame write */
act = bpf_prog_run_xdp(xdp_prog, xdp);
--
1.8.3.1
next prev parent reply other threads:[~2019-08-13 12:08 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-13 12:05 [RFC PATCH bpf-next 00/14] xdp_flow: Flow offload to XDP Toshiaki Makita
2019-08-13 12:05 ` [RFC PATCH bpf-next 01/14] xdp_flow: Add skeleton of XDP based TC offload driver Toshiaki Makita
2019-08-13 12:05 ` [RFC PATCH bpf-next 02/14] xdp_flow: Add skeleton bpf program for XDP Toshiaki Makita
2019-08-13 12:05 ` [RFC PATCH bpf-next 03/14] bpf: Add API to get program from id Toshiaki Makita
2019-08-13 12:05 ` [RFC PATCH bpf-next 04/14] xdp_flow: Attach bpf prog to XDP in kernel after UMH loaded program Toshiaki Makita
2019-08-13 12:05 ` [RFC PATCH bpf-next 05/14] xdp_flow: Prepare flow tables in bpf Toshiaki Makita
2019-08-13 12:05 ` [RFC PATCH bpf-next 06/14] xdp_flow: Add flow entry insertion/deletion logic in UMH Toshiaki Makita
2019-08-13 12:05 ` [RFC PATCH bpf-next 07/14] xdp_flow: Add flow handling and basic actions in bpf prog Toshiaki Makita
2019-08-13 12:05 ` [RFC PATCH bpf-next 08/14] xdp_flow: Implement flow replacement/deletion logic in xdp_flow kmod Toshiaki Makita
2019-08-13 12:05 ` [RFC PATCH bpf-next 09/14] xdp_flow: Add netdev feature for enabling TC flower offload to XDP Toshiaki Makita
2019-08-13 12:05 ` [RFC PATCH bpf-next 10/14] xdp_flow: Implement redirect action Toshiaki Makita
2019-08-13 12:05 ` [RFC PATCH bpf-next 11/14] xdp_flow: Implement vlan_push action Toshiaki Makita
2019-08-13 12:05 ` [RFC PATCH bpf-next 12/14] bpf, selftest: Add test for xdp_flow Toshiaki Makita
2019-08-13 12:05 ` Toshiaki Makita [this message]
2019-08-13 12:05 ` [RFC PATCH bpf-next 14/14] bpf, hashtab: Compare keys in long Toshiaki Makita
2019-08-14 1:44 ` [RFC PATCH bpf-next 00/14] xdp_flow: Flow offload to XDP Alexei Starovoitov
2019-08-14 7:33 ` Toshiaki Makita
2019-08-15 10:59 ` Toshiaki Makita
2019-08-14 17:07 ` Stanislav Fomichev
2019-08-15 10:26 ` Toshiaki Makita
2019-08-15 15:21 ` Stanislav Fomichev
2019-08-15 19:22 ` Jakub Kicinski
2019-08-16 1:28 ` Toshiaki Makita
2019-08-16 18:52 ` Jakub Kicinski
2019-08-17 14:01 ` Toshiaki Makita
2019-08-19 18:15 ` Jakub Kicinski
2019-08-21 8:49 ` Toshiaki Makita
2019-08-21 18:38 ` Jakub Kicinski
2019-08-16 15:59 ` Stanislav Fomichev
2019-08-16 16:20 ` Stanislav Fomichev
2019-08-16 1:09 ` Toshiaki Makita
2019-08-16 15:35 ` Stanislav Fomichev
2019-08-17 14:10 ` Toshiaki Makita
2019-08-15 15:46 ` William Tu
2019-08-16 1:38 ` Toshiaki Makita
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