From: Andrew Rybchenko <arybchenko@solarflare.com>
To: Michal Krawczyk <mk@semihalf.com>, <dev@dpdk.org>
Cc: <mw@semihalf.com>, <mba@semihalf.com>, <gtzalik@amazon.com>,
<evgenys@amazon.com>, <igorch@amazon.com>
Subject: Re: [dpdk-dev] [PATCH 04/29] net/ena/base: set default hash key
Date: Fri, 27 Mar 2020 14:12:27 +0300 [thread overview]
Message-ID: <2c706c63-1138-8097-eda2-ef721ed30071@solarflare.com> (raw)
In-Reply-To: <20200327101823.12646-5-mk@semihalf.com>
On 3/27/20 1:17 PM, Michal Krawczyk wrote:
> The RSS hash key was present in the device, but it wasn't exposed to
> the user. The other key still cannot be set, but now it can be accessed
> if one needs to do that.
>
> By default, the random hash key is used and it is generated only once
> when requested for the first time.
>
> Signed-off-by: Michal Krawczyk <mk@semihalf.com>
> Reviewed-by: Igor Chauskin <igorch@amazon.com>
> Reviewed-by: Guy Tzalik <gtzalik@amazon.com>
[snip]
> diff --git a/drivers/net/ena/ena_ethdev.c b/drivers/net/ena/ena_ethdev.c
> index cab38152a7..4c1e4899d0 100644
> --- a/drivers/net/ena/ena_ethdev.c
> +++ b/drivers/net/ena/ena_ethdev.c
> @@ -256,6 +256,22 @@ static const struct eth_dev_ops ena_dev_ops = {
> .reta_query = ena_rss_reta_query,
> };
>
> +void ena_rss_key_fill(void *key, size_t size)
> +{
> + static bool key_generated;
> + static uint8_t default_key[ENA_HASH_KEY_SIZE];
You have thread-safety patches in the series before this one.
Is it OK to be thread-unsafe here?
> +
> + RTE_ASSERT(size <= ENA_HASH_KEY_SIZE);
> +
> + if (unlikely(!key_generated)) {
I believe that unlikely() is not required here. It is not a
datapath and there is no point to use likely/unlikely on
control path.
> + for (size_t i = 0; i < ENA_HASH_KEY_SIZE; ++i)
It is C99 feature which breaks DPDK build pretty often, since
neither c99 nor higher are requested in default DPDK build.
> + default_key[i] = rte_rand() & 0xff;
> + key_generated = true;
> + }
> +
> + rte_memcpy(key, default_key, size);
> +}
> +
> static inline void ena_rx_mbuf_prepare(struct rte_mbuf *mbuf,
> struct ena_com_rx_ctx *ena_rx_ctx)
> {
>
next prev parent reply other threads:[~2020-03-27 11:12 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-27 10:17 [dpdk-dev] [PATCH 00/29] Update ENA driver to v2.1.0 Michal Krawczyk
2020-03-27 10:17 ` [dpdk-dev] [PATCH 01/29] net/ena: check if size of buffer is at least 1400B Michal Krawczyk
2020-03-27 10:55 ` Andrew Rybchenko
2020-03-31 9:47 ` Michał Krawczyk
2020-03-27 14:51 ` Stephen Hemminger
2020-03-31 9:48 ` Michał Krawczyk
2020-03-27 10:17 ` [dpdk-dev] [PATCH 02/29] net/ena/base: make allocation macros thread-safe Michal Krawczyk
2020-03-27 14:54 ` Stephen Hemminger
2020-03-31 9:47 ` Michał Krawczyk
2020-03-27 10:17 ` [dpdk-dev] [PATCH 03/29] net/ena/base: prevent allocation of 0-sized memory Michal Krawczyk
2020-03-27 10:17 ` [dpdk-dev] [PATCH 04/29] net/ena/base: set default hash key Michal Krawczyk
2020-03-27 11:12 ` Andrew Rybchenko [this message]
2020-03-31 9:40 ` Michał Krawczyk
2020-03-31 9:51 ` Michał Krawczyk
2020-03-27 10:17 ` [dpdk-dev] [PATCH 05/29] net/ena/base: rework interrupt moderation Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 06/29] net/ena/base: remove extra properties strings Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 07/29] net/ena/base: add accelerated LLQ mode Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 08/29] net/ena/base: fix documentation of the functions Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 09/29] net/ena/base: fix indentation in cq polling Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 10/29] net/ena/base: add error logs when preparing Tx Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 11/29] net/ena/base: use 48-bit memory addresses in ena_com Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 12/29] net/ena/base: fix types for printing timestamps Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 13/29] net/ena/base: fix indentation of multiple defines Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 14/29] net/ena/base: update gen date and commit Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 15/29] net/ena: set IO ring size to the valid value Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 16/29] net/ena: refactor getting IO queues capabilities Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 17/29] net/ena: add support for large LLQ headers Michal Krawczyk
2020-03-27 11:20 ` Andrew Rybchenko
2020-03-31 9:42 ` Michał Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 18/29] net/ena: remove memory barriers before doorbells Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 19/29] net/ena: add Tx drops statistic Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 20/29] net/ena: disable meta caching Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 21/29] net/ena: refactor Rx path Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 22/29] net/ena: rework getting number of available descs Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 23/29] net/ena: limit refill threshold by fixed value Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 24/29] net/ena: use macros for ring idx operations Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 25/29] net/ena: refactor Tx path Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 26/29] net/ena: reuse 0 length Rx descriptor Michal Krawczyk
2020-03-27 11:29 ` Andrew Rybchenko
2020-03-31 9:45 ` Michał Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 27/29] doc: add notes on ENA usage on metal instances Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 28/29] net/ena: update copyright date Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 29/29] net/ena: update version of the driver to v2.1.0 Michal Krawczyk
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=2c706c63-1138-8097-eda2-ef721ed30071@solarflare.com \
--to=arybchenko@solarflare.com \
--cc=dev@dpdk.org \
--cc=evgenys@amazon.com \
--cc=gtzalik@amazon.com \
--cc=igorch@amazon.com \
--cc=mba@semihalf.com \
--cc=mk@semihalf.com \
--cc=mw@semihalf.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).