From: Sieng Piaw Liew <liew.s.piaw@gmail.com>
To: Florian Fainelli <f.fainelli@gmail.com>
Cc: bcm-kernel-feedback-list@broadcom.com,
Sieng Piaw Liew <liew.s.piaw@gmail.com>,
netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: [PATCH net-next v3 4/7] bcm63xx_enet: alloc rx skb with NET_IP_ALIGN
Date: Wed, 6 Jan 2021 22:42:05 +0800 [thread overview]
Message-ID: <20210106144208.1935-5-liew.s.piaw@gmail.com> (raw)
In-Reply-To: <20210106144208.1935-1-liew.s.piaw@gmail.com>
Use netdev_alloc_skb_ip_align on newer SoCs with integrated switch
(enetsw) when refilling RX. Increases packet processing performance
by 30% (with netif_receive_skb_list).
Non-enetsw SoCs cannot function with the extra pad so continue to use
the regular netdev_alloc_skb.
Tested on BCM6328 320 MHz and iperf3 -M 512 to measure packet/sec
performance.
Before:
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-30.00 sec 120 MBytes 33.7 Mbits/sec 277 sender
[ 4] 0.00-30.00 sec 120 MBytes 33.5 Mbits/sec receiver
After (+netif_receive_skb_list):
[ 4] 0.00-30.00 sec 155 MBytes 43.3 Mbits/sec 354 sender
[ 4] 0.00-30.00 sec 154 MBytes 43.1 Mbits/sec receiver
Signed-off-by: Sieng Piaw Liew <liew.s.piaw@gmail.com>
---
drivers/net/ethernet/broadcom/bcm63xx_enet.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/broadcom/bcm63xx_enet.c b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
index 21744dae30ce..96d56c3e2cc9 100644
--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
@@ -237,7 +237,10 @@ static int bcm_enet_refill_rx(struct net_device *dev)
desc = &priv->rx_desc_cpu[desc_idx];
if (!priv->rx_skb[desc_idx]) {
- skb = netdev_alloc_skb(dev, priv->rx_skb_size);
+ if (priv->enet_is_sw)
+ skb = netdev_alloc_skb_ip_align(dev, priv->rx_skb_size);
+ else
+ skb = netdev_alloc_skb(dev, priv->rx_skb_size);
if (!skb)
break;
priv->rx_skb[desc_idx] = skb;
--
2.17.1
next prev parent reply other threads:[~2021-01-06 14:44 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-06 14:42 [PATCH net-next v3 0/7] bcm63xx_enet: major makeover of driver Sieng Piaw Liew
2021-01-06 14:42 ` [PATCH net-next v3 1/7] bcm63xx_enet: batch process rx path Sieng Piaw Liew
2021-01-06 17:04 ` Florian Fainelli
2021-01-06 14:42 ` [PATCH net-next v3 2/7] bcm63xx_enet: add BQL support Sieng Piaw Liew
2021-01-06 17:05 ` Florian Fainelli
2021-01-06 14:42 ` [PATCH net-next v3 3/7] bcm63xx_enet: add xmit_more support Sieng Piaw Liew
2021-01-06 17:05 ` Florian Fainelli
2021-01-06 14:42 ` Sieng Piaw Liew [this message]
2021-01-06 17:06 ` [PATCH net-next v3 4/7] bcm63xx_enet: alloc rx skb with NET_IP_ALIGN Florian Fainelli
2021-01-06 14:42 ` [PATCH net-next v3 5/7] bcm63xx_enet: consolidate rx SKB ring cleanup code Sieng Piaw Liew
2021-01-06 17:07 ` Florian Fainelli
2021-01-06 14:42 ` [PATCH net-next v3 6/7] bcm63xx_enet: convert to build_skb Sieng Piaw Liew
2021-01-06 17:08 ` Florian Fainelli
2021-01-06 14:42 ` [PATCH net-next v3 7/7] bcm63xx_enet: improve rx loop Sieng Piaw Liew
2021-01-06 17:08 ` Florian Fainelli
2021-01-06 17:03 ` [PATCH net-next v3 0/7] bcm63xx_enet: major makeover of driver Florian Fainelli
2021-01-07 20:41 ` Jakub Kicinski
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210106144208.1935-5-liew.s.piaw@gmail.com \
--to=liew.s.piaw@gmail.com \
--cc=bcm-kernel-feedback-list@broadcom.com \
--cc=f.fainelli@gmail.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).