From: fengchengwen <fengchengwen@huawei.com>
To: <thomas@monjalon.net>
Cc: <dev@dpdk.org>, <kevin.laatz@intel.com>, <bruce.richardson@intel.com>
Subject: Re: [PATCH v2] examples/dma: support DMA dequeue when no packet received
Date: Tue, 13 Sep 2022 09:44:18 +0800 [thread overview]
Message-ID: <bc7cf756-c8e9-aa9b-67ec-150b0e3e1cb4@huawei.com> (raw)
In-Reply-To: <20220725122200.47851-1-fengchengwen@huawei.com>
Kindly ping.
On 2022/7/25 20:22, Chengwen Feng wrote:
> Currently the example using DMA in asynchronous mode, which are:
> nb_rx = rte_eth_rx_burst();
> if (nb_rx == 0)
> continue;
> ...
> dma_enqueue(); // enqueue the received packets copy request
> nb_cpl = dma_dequeue(); // get copy completed packets
> ...
>
> There are no waiting inside dma_dequeue(), and this is why it's called
> asynchronus. If there are no packet received, it won't call
> dma_dequeue(), but some packets may still in the DMA queue which
> enqueued in last cycle. As a result, when the traffic is stopped, the
> sent packets and received packets are unbalanced from the perspective
> of the traffic generator.
>
> The patch supports DMA dequeue when no packet received, it helps to
> judge the test result by comparing the sent packets with the received
> packets on traffic generator sides.
>
> Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
> ---
...
prev parent reply other threads:[~2022-09-13 1:44 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-25 12:22 Chengwen Feng
2022-07-25 12:48 ` Bruce Richardson
2022-10-03 16:21 ` Thomas Monjalon
2022-07-26 8:49 ` Kevin Laatz
2022-09-13 1:44 ` fengchengwen [this message]
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=bc7cf756-c8e9-aa9b-67ec-150b0e3e1cb4@huawei.com \
--to=fengchengwen@huawei.com \
--cc=bruce.richardson@intel.com \
--cc=dev@dpdk.org \
--cc=kevin.laatz@intel.com \
--cc=thomas@monjalon.net \
/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).