DPDK usage discussions
 help / color / mirror / Atom feed
From: fwefew 4t4tg <7532yahoo@gmail.com>
To: users@dpdk.org
Subject: Preliminary AWS ENA Benchmark Results on DPDK
Date: Sun, 27 Mar 2022 20:03:46 -0400
Message-ID: <CA+Tq66USfTvFcimMANTJ9j5m86gBYd-Ey507Bn4bZO+8xLh2+Q@mail.gmail.com> (raw)

[-- Attachment #1: Type: text/plain, Size: 1363 bytes --]


I show two c5n.metal boxes with AWS ENA NICs running under DPDK in the same
data center running 1 TXQ and 1 RXQ transceiving 72-byte UDP packets
(32-byte payload):

- transmit around 874,410 packets/sec/queue

If the NIC's TXQ ring is not full the application code can hand off packets
to the NICs output buffer as fast as 415 ns/pkt or  some 2.4 million
packets/sec. But once the TXQ ring or HW buffers get full, throughput drops
about 3x. I will update the link shortly with the RX states. In short,
performance seems decent except when rings are full.

But since AWS ENA NICs are virtual --- they are not a bonafide NIC card
plugged into the computer's PCI bus, I'm not sure if these numbers are
good, average, or suck. Indeed as per:


chapter 12 (virtio) page 236 virtio is at least partially interrupt driven.
I had no idea of the details but interrupt driven surely has to under
perform a vanilla case where the CPU/NIC/PCI work in unison without all the
virtualization technology. I'm not even sure, by extension, whether the ENA
driver is really 100% poll-driven.

Any context/feedback here would be appreciated.

[-- Attachment #2: Type: text/html, Size: 1771 bytes --]

                 reply	other threads:[~2022-03-28  0:03 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:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=CA+Tq66USfTvFcimMANTJ9j5m86gBYd-Ey507Bn4bZO+8xLh2+Q@mail.gmail.com \
    --to=7532yahoo@gmail.com \
    --cc=users@dpdk.org \


* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

DPDK usage discussions

This inbox may be cloned and mirrored by anyone:

	git clone --mirror http://inbox.dpdk.org/users/0 users/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 users users/ http://inbox.dpdk.org/users \
	public-inbox-index users

Example config snippet for mirrors.
Newsgroup available over NNTP:

AGPL code for this site: git clone https://public-inbox.org/public-inbox.git