DPDK patches and discussions
 help / color / mirror / Atom feed
From: David Marchand <david.marchand@redhat.com>
To: "You, KaisenX" <kaisenx.you@intel.com>
Cc: Ferruh Yigit <ferruh.yigit@amd.com>,
	"dev@dpdk.org" <dev@dpdk.org>,
	 "Burakov, Anatoly" <anatoly.burakov@intel.com>,
	"stable@dpdk.org" <stable@dpdk.org>,
	 "Yang, Qiming" <qiming.yang@intel.com>,
	"Zhou, YidingX" <yidingx.zhou@intel.com>,
	 "Wu, Jingjing" <jingjing.wu@intel.com>,
	"Xing, Beilei" <beilei.xing@intel.com>,
	"Zhang, Qi Z" <qi.z.zhang@intel.com>,
	Luca Boccassi <bluca@debian.org>,
	 "Mcnamara, John" <john.mcnamara@intel.com>,
	Kevin Traynor <ktraynor@redhat.com>
Subject: Re: [PATCH] net/iavf:fix slow memory allocation
Date: Tue, 20 Dec 2022 10:33:36 +0100	[thread overview]
Message-ID: <CAJFAV8y2wBnjcTn3d=mj7-K1AF2Avb3LLjjNf1s6iQRe404qOg@mail.gmail.com> (raw)
In-Reply-To: <SJ0PR11MB6765839AAA1D619724D69908E1EA9@SJ0PR11MB6765.namprd11.prod.outlook.com>

On Tue, Dec 20, 2022 at 7:52 AM You, KaisenX <kaisenx.you@intel.com> wrote:
> > >> As to the reason for not using rte_malloc_socket. I thought
> > >> rte_malloc_socket() could solve the problem too. And the appropriate
> > >> parameter should be the socket_id that created the memory pool for
> > >> DPDK initialization. Assuming that> the socket_id of the initially
> > >> allocated memory = 1, first let the
> > > eal_intr_thread
> > >> determine if it is on the socket_id, then record this socket_id in
> > >> the eal_intr_thread and pass it to the iavf_event_thread.  But there
> > >> seems no way to link this parameter to the iavf_dev_event_post()
> > function. That is why rte_malloc_socket is not used.
> > >>
> > >
> > > I was thinking socket id of device can be used, but that won't help if
> > > the core that interrupt handler runs is in different socket.
> > > And I also don't know if there is a way to get socket that interrupt
> > > thread is on. @David may help perhaps.
> > >
> > > So question is why interrupt thread is not running on main lcore.
> > >
> >
> > OK after some talk with David, what I am missing is 'rte_ctrl_thread_create()'
> > does NOT run on main lcore, it can run on any core except data plane cores.
> >
> > Driver "iavf-event-thread" thread (iavf_dev_event_handle()) and interrupt
> > thread (so driver interrupt callback iavf_dev_event_post()) can run on any
> > core, making it hard to manage.
> > And it seems it is not possible to control where interrupt thread to run.
> >
> > One option can be allocating hugepages for all sockets, but this requires user
> > involvement, and can't happen transparently.
> >
> > Other option can be to control where "iavf-event-thread" run, like using
> > 'rte_thread_create()' to create thread and provide attribute to run it on main
> > lcore (rte_lcore_cpuset(rte_get_main_lcore()))?
> >
> > Can you please test above option?
> >
> >
> The first option can solve this issue. but to borrow from your previous saying,
> "in a dual socket system, if all used cores are in socket 1 and the NIC is in socket 1,
>  no memory is allocated for socket 0.  This is to optimize memory consumption."
> I think it's unreasonable to do so.
>
> About other option. In " rte_eal_intr_init" function, After the thread is created,
> I set the thread affinity for eal-intr-thread, but it does not solve this issue.

Jumping in this thread.

I tried to play a bit with a E810 nic on a dual numa and I can't see
anything wrong for now.
Can you provide a simple and small reproducer of your issue?

Thanks.

-- 
David Marchand


  reply	other threads:[~2022-12-20  9:33 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-11-17  6:57 Kaisen You
2022-11-18  8:22 ` Jiale, SongX
2022-12-07  9:07 ` You, KaisenX
2022-12-08  8:46 ` Wu, Jingjing
2022-12-08 15:04 ` Ferruh Yigit
2022-12-13  7:52   ` You, KaisenX
2022-12-13  9:35     ` Ferruh Yigit
2022-12-13 13:27       ` Ferruh Yigit
2022-12-20  6:52         ` You, KaisenX
2022-12-20  9:33           ` David Marchand [this message]
2022-12-20 10:11             ` You, KaisenX
2022-12-20 10:33               ` David Marchand
2022-12-21  9:12                 ` You, KaisenX
2022-12-21 10:50                   ` David Marchand
2022-12-22  6:42                     ` You, KaisenX
2022-12-27  6:06                       ` You, KaisenX
2023-01-10 10:16                         ` David Marchand
2023-01-13  6:24                           ` You, KaisenX
2022-12-21 13:48           ` Ferruh Yigit
2022-12-22  7:23             ` You, KaisenX
2022-12-22 12:06               ` Ferruh Yigit
2022-12-26  2:17                 ` Zhang, Qi Z

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='CAJFAV8y2wBnjcTn3d=mj7-K1AF2Avb3LLjjNf1s6iQRe404qOg@mail.gmail.com' \
    --to=david.marchand@redhat.com \
    --cc=anatoly.burakov@intel.com \
    --cc=beilei.xing@intel.com \
    --cc=bluca@debian.org \
    --cc=dev@dpdk.org \
    --cc=ferruh.yigit@amd.com \
    --cc=jingjing.wu@intel.com \
    --cc=john.mcnamara@intel.com \
    --cc=kaisenx.you@intel.com \
    --cc=ktraynor@redhat.com \
    --cc=qi.z.zhang@intel.com \
    --cc=qiming.yang@intel.com \
    --cc=stable@dpdk.org \
    --cc=yidingx.zhou@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).