From: shengxiao qian <tedsxqian@gmail.com>
To: users@dpdk.org
Subject: [dpdk-users] The latency of dpdk is more than 400us, something wrong?
Date: Wed, 9 May 2018 10:57:57 +0800 [thread overview]
Message-ID: <CAPd3biCTS79T0mPgRM1jFUwqdPJQOqSGz3cKMkW+=V7gH4MQXg@mail.gmail.com> (raw)
NIC: Intel 82599ES
DPDK version: 17.08.1
My test model is like this：
Host A send request packet to host B，when host B receive the request
packet，host B send replay packet to host A。Then host A send next request to
host B ...
When the request packet size is less than or equal to 128 bytes, it works
fine. the round trip latency is less than 12us. But if the packet size is
more than 128 bytes（even 129bytes),The latency is more than 400us。
I find that most of the time consumed in the receiving package.
In my application, I call the rte_eth_tx_burst() about every 1us.
What may be the cause? The NIC or dpdk driver receive packet made some
batch?
reply other threads:[~2018-05-09 2:57 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
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='CAPd3biCTS79T0mPgRM1jFUwqdPJQOqSGz3cKMkW+=V7gH4MQXg@mail.gmail.com' \
--to=tedsxqian@gmail.com \
--cc=users@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).