From: Konstantin Ananyev <konstantin.ananyev@huawei.com>
To: Stephen Hemminger <stephen@networkplumber.org>,
"dev@dpdk.org" <dev@dpdk.org>
Subject: RE: unnecessary rx callbacks when zero packets
Date: Mon, 8 Jan 2024 15:20:58 +0000 [thread overview]
Message-ID: <e1cf039bea144cf0bc642d05ab5f7626@huawei.com> (raw)
In-Reply-To: <20240107093721.512f1365@hermes.local>
rx callbacks when zero packets
>
> I noticed while looking at packet capture that currently the receive callbacks
> get called even if there are no packets. This seems unnecessary since if
> nb_rx is zero, then there are no packets to look at. My one concern is that
> an application could be using callbacks as some form of scheduling mechanism
> which would be broken.
As I remember, original idea was to allow callbacks to inject new packets if needed.
>
> The change would be:
>
>
> diff --git a/lib/ethdev/rte_ethdev.h b/lib/ethdev/rte_ethdev.h
> index 21e3a21903ec..f64bf977c46e 100644
> --- a/lib/ethdev/rte_ethdev.h
> +++ b/lib/ethdev/rte_ethdev.h
> @@ -6077,7 +6077,7 @@ rte_eth_rx_burst(uint16_t port_id, uint16_t queue_id,
> nb_rx = p->rx_pkt_burst(qd, rx_pkts, nb_pkts);
>
> #ifdef RTE_ETHDEV_RXTX_CALLBACKS
> - {
> + if (nb_rx > 0) {
> void *cb;
>
> /* rte_memory_order_release memory order was used when the
next prev parent reply other threads:[~2024-01-08 15:21 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-07 17:37 Stephen Hemminger
2024-01-07 20:57 ` Honnappa Nagarahalli
2024-01-08 10:19 ` Morten Brørup
2024-01-08 15:20 ` Konstantin Ananyev [this message]
2024-01-09 11:28 ` Ferruh Yigit
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=e1cf039bea144cf0bc642d05ab5f7626@huawei.com \
--to=konstantin.ananyev@huawei.com \
--cc=dev@dpdk.org \
--cc=stephen@networkplumber.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).