From: "Zhou, Tianlin" <tianlin.zhou@tekcomms.com>
To: "dev@dpdk.org" <dev@dpdk.org>
Subject: [dpdk-dev] Poor Virtio PMD TX Performance
Date: Fri, 5 Jun 2015 09:23:24 +0000 [thread overview]
Message-ID: <7D6C3D7847A9FE4E8EB311EAC72727A04EB1447D@US-BV-EXM02-P.global.tektronix.net> (raw)
Hi there,
We tested TX performance of Virtio PMD by DPDK l2fwd, but found even at 60KPPS (720B packet length) TX rate, there is 1/1000 packet dropping rate.
The log shows "No free tx descriptors to transmit" in Virtio PMD.
Increasing TX queues by modifying DPDK l2fwd can decreases packet dropping rate, but can't ensure no packet dropping unless retransmitting packets that can't be sent successfully.
Oppositely, RX rate can be 600KPPS without packet dropping.
Test Env
- Host CPU: 4 cores, 2127.770MHz
- Host Memory: 8G
- Host OS: Linux dw-2 3.13.0-24-generic #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
- Guest CPU: 4 cores, 2127.770MHz
- Guest Memory: 4G
- Guest OS: fedora20
Anybody here face the same problem?
-Tianlin
next reply other threads:[~2015-06-05 9:23 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-05 9:23 Zhou, Tianlin [this message]
[not found] ` <F52918179C57134FAEC9EA62FA2F962511B84FEE@shsmsx102.ccr.corp.intel.com>
2015-06-12 9:35 ` Zhou, Tianlin
2015-06-12 9:45 ` Jason Wang
2015-06-15 7:04 ` Zhou, Tianlin
2015-06-12 15:46 ` Ouyang, Changchun
2015-06-05 10:06 [dpdk-dev] 答复： " 钢锁0310
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=7D6C3D7847A9FE4E8EB311EAC72727A04EB1447D@US-BV-EXM02-P.global.tektronix.net \
--to=tianlin.zhou@tekcomms.com \
--cc=dev@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).