From: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
To: dev@dpdk.org
Cc: nirranjan@chelsio.com, stable@dpdk.org
Subject: [dpdk-stable] [PATCH 05/12] net/cxgbe: fix prefetch for non-coalesced Tx packets
Date: Sat, 7 Sep 2019 03:22:26 +0530 [thread overview]
Message-ID: <f797f93570f60964b4fbf80617bd86b5b292a90c.1567799552.git.rahul.lakkireddy@chelsio.com> (raw)
In-Reply-To: <cover.1567799552.git.rahul.lakkireddy@chelsio.com>
In-Reply-To: <cover.1567799552.git.rahul.lakkireddy@chelsio.com>
Move prefetch code out of Tx coalesce path to allow prefetching for
non-coalesced Tx packets, as well.
Cc: stable@dpdk.org
Fixes: bf89cbedd2d9 ("cxgbe: optimize forwarding performance for 40G")
Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
---
drivers/net/cxgbe/cxgbe_ethdev.c | 9 +++++++--
drivers/net/cxgbe/sge.c | 1 -
2 files changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/net/cxgbe/cxgbe_ethdev.c b/drivers/net/cxgbe/cxgbe_ethdev.c
index efb458d47..fb174f8d4 100644
--- a/drivers/net/cxgbe/cxgbe_ethdev.c
+++ b/drivers/net/cxgbe/cxgbe_ethdev.c
@@ -67,6 +67,7 @@ uint16_t cxgbe_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
struct sge_eth_txq *txq = (struct sge_eth_txq *)tx_queue;
uint16_t pkts_sent, pkts_remain;
uint16_t total_sent = 0;
+ uint16_t idx = 0;
int ret = 0;
CXGBE_DEBUG_TX(adapter, "%s: txq = %p; tx_pkts = %p; nb_pkts = %d\n",
@@ -75,12 +76,16 @@ uint16_t cxgbe_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
t4_os_lock(&txq->txq_lock);
/* free up desc from already completed tx */
reclaim_completed_tx(&txq->q);
+ rte_prefetch0(rte_pktmbuf_mtod(tx_pkts[0], volatile void *));
while (total_sent < nb_pkts) {
pkts_remain = nb_pkts - total_sent;
for (pkts_sent = 0; pkts_sent < pkts_remain; pkts_sent++) {
- ret = t4_eth_xmit(txq, tx_pkts[total_sent + pkts_sent],
- nb_pkts);
+ idx = total_sent + pkts_sent;
+ if ((idx + 1) < nb_pkts)
+ rte_prefetch0(rte_pktmbuf_mtod(tx_pkts[idx + 1],
+ volatile void *));
+ ret = t4_eth_xmit(txq, tx_pkts[idx], nb_pkts);
if (ret < 0)
break;
}
diff --git a/drivers/net/cxgbe/sge.c b/drivers/net/cxgbe/sge.c
index 641be9657..bf3190211 100644
--- a/drivers/net/cxgbe/sge.c
+++ b/drivers/net/cxgbe/sge.c
@@ -1154,7 +1154,6 @@ int t4_eth_xmit(struct sge_eth_txq *txq, struct rte_mbuf *mbuf,
txq->stats.mapping_err++;
goto out_free;
}
- rte_prefetch0((volatile void *)addr);
return tx_do_packet_coalesce(txq, mbuf, cflits, adap,
pi, addr, nb_pkts);
} else {
--
2.18.0
next prev parent reply other threads:[~2019-09-06 21:59 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1567799552.git.rahul.lakkireddy@chelsio.com>
2019-09-06 21:52 ` [dpdk-stable] [PATCH 01/12] net/cxgbe: add cxgbe_ prefix to global functions Rahul Lakkireddy
2019-09-06 21:52 ` [dpdk-stable] [PATCH 02/12] net/cxgbe: fix NULL access when allocating CLIP entry Rahul Lakkireddy
2019-09-06 21:52 ` [dpdk-stable] [PATCH 03/12] net/cxgbe: fix slot allocation for IPv6 flows Rahul Lakkireddy
2019-09-06 21:52 ` [dpdk-stable] [PATCH 04/12] net/cxgbe: fix parsing VLAN ID rewrite action Rahul Lakkireddy
2019-09-06 21:52 ` Rahul Lakkireddy [this message]
2019-09-06 21:52 ` [dpdk-stable] [PATCH 06/12] net/cxgbe: avoid polling link status before device start Rahul Lakkireddy
[not found] ` <cover.1569611036.git.rahul.lakkireddy@chelsio.com>
2019-09-27 20:30 ` [dpdk-stable] [PATCH v2 01/12] net/cxgbe: add cxgbe_ prefix to global functions Rahul Lakkireddy
2019-09-27 20:30 ` [dpdk-stable] [PATCH v2 02/12] net/cxgbe: fix NULL access when allocating CLIP entry Rahul Lakkireddy
2019-09-27 20:30 ` [dpdk-stable] [PATCH v2 03/12] net/cxgbe: fix slot allocation for IPv6 flows Rahul Lakkireddy
2019-09-27 20:30 ` [dpdk-stable] [PATCH v2 04/12] net/cxgbe: fix parsing VLAN ID rewrite action Rahul Lakkireddy
2019-09-27 20:30 ` [dpdk-stable] [PATCH v2 05/12] net/cxgbe: fix prefetch for non-coalesced Tx packets Rahul Lakkireddy
2019-09-27 20:30 ` [dpdk-stable] [PATCH v2 06/12] net/cxgbe: avoid polling link status before device start Rahul Lakkireddy
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=f797f93570f60964b4fbf80617bd86b5b292a90c.1567799552.git.rahul.lakkireddy@chelsio.com \
--to=rahul.lakkireddy@chelsio.com \
--cc=dev@dpdk.org \
--cc=nirranjan@chelsio.com \
--cc=stable@dpdk.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).