From: Maxime Coquelin <maxime.coquelin@redhat.com>
To: dev@dpdk.org, jfreimann@redhat.com, tiwei.bie@intel.com,
zhihong.wang@intel.com
Cc: Maxime Coquelin <maxime.coquelin@redhat.com>
Subject: [dpdk-dev] [PATCH v3 0/3] net/virtio: Rx paths improvements
Date: Thu, 20 Dec 2018 18:27:15 +0100 [thread overview]
Message-ID: <20181220172718.9615-1-maxime.coquelin@redhat.com> (raw)
First version of this series did merge out-of-order mergeable
and non-mergeable receive paths, but Intel STV team highlighted
some performance regression when using multiqueue with two cores
enqueueing descs on host, while a single core dequeues the
two queues.
I didn't manage to close the performance gap, so I decided to
give-up this refactoring. But while trying to optimize, I reworked
the meargeable function so that it looks like the in-order one.
I.e. descriptors are now dequeued in batches, so are descriptors
refilled. Doing that, I measure a perfromance gain of 6% when doing
rxonly microbenchmark with two cores on host, one in guest.
Changes since v2:
- Rebase after Jens' packed ring series
- Break refill loop if VQ_RING_DESC_CHAIN_END (Tiwei)
- Fixup commit message
Maxime Coquelin (3):
net/virtio: inline refill and offload helpers
net/virtio: add non-mergeable support to in-order path
net/virtio: improve batching in mergeable path
drivers/net/virtio/virtio_ethdev.c | 14 +-
drivers/net/virtio/virtio_ethdev.h | 2 +-
drivers/net/virtio/virtio_rxtx.c | 257 ++++++++++++++++-------------
3 files changed, 145 insertions(+), 128 deletions(-)
--
2.17.2
next reply other threads:[~2018-12-20 17:27 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-20 17:27 Maxime Coquelin [this message]
2018-12-20 17:27 ` [dpdk-dev] [PATCH v3 1/3] net/virtio: inline refill and offload helpers Maxime Coquelin
2018-12-20 17:27 ` [dpdk-dev] [PATCH v3 2/3] net/virtio: add non-mergeable support to in-order path Maxime Coquelin
2018-12-20 17:27 ` [dpdk-dev] [PATCH v3 3/3] net/virtio: improve batching in mergeable path Maxime Coquelin
2018-12-21 6:27 ` Gavin Hu (Arm Technology China)
2018-12-21 8:36 ` Maxime Coquelin
2018-12-21 8:41 ` Gavin Hu (Arm Technology China)
2018-12-21 9:20 ` [dpdk-dev] [PATCH v3 0/3] net/virtio: Rx paths improvements Maxime Coquelin
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=20181220172718.9615-1-maxime.coquelin@redhat.com \
--to=maxime.coquelin@redhat.com \
--cc=dev@dpdk.org \
--cc=jfreimann@redhat.com \
--cc=tiwei.bie@intel.com \
--cc=zhihong.wang@intel.com \
/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).