From: Olivier Matz <olivier.matz@6wind.com>
To: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Cc: David Marchand <david.marchand@redhat.com>,
Andrew Rybchenko <arybchenko@solarflare.com>,
Jerin Jacob <jerinjacobk@gmail.com>, dpdk-dev <dev@dpdk.org>,
Gage Eads <gage.eads@intel.com>,
"Artem V. Andreev" <artem.andreev@oktetlabs.ru>,
Jerin Jacob <jerinj@marvell.com>,
Nithin Dabilpuram <ndabilpuram@marvell.com>,
Vamsi Attunuru <vattunuru@marvell.com>,
Hemant Agrawal <hemant.agrawal@nxp.com>,
"Burakov, Anatoly" <anatoly.burakov@intel.com>,
Bruce Richardson <bruce.richardson@intel.com>
Subject: Re: [dpdk-dev] [PATCH dpdk-dev v3] mempool: sort the rte_mempool_ops by name
Date: Mon, 16 Mar 2020 08:55:49 +0100 [thread overview]
Message-ID: <20200316075549.GH17125@platinum> (raw)
In-Reply-To: <CAMDZJNXfj8pGM648hswpG7UhoMy-eNJDk4e8wDDaJpP=GrJuMw@mail.gmail.com>
Hi Tonghao,
On Mon, Mar 16, 2020 at 03:43:40PM +0800, Tonghao Zhang wrote:
> On Mon, Mar 9, 2020 at 9:15 PM David Marchand <david.marchand@redhat.com> wrote:
> >
> > On Mon, Mar 9, 2020 at 9:56 AM Tonghao Zhang <xiangxia.m.yue@gmail.com> wrote:
> > > On Mon, Mar 9, 2020 at 4:27 PM Olivier Matz <olivier.matz@6wind.com> wrote:
> > > > The fact that the ops index changes during mempool driver lifetime is
> > > > indeed frightening, especially knowning that this is a dynamic
> > > > registration that could happen at any moment in the life of the
> > > > application. Also, breaking the ABI is not desirable.
> > > That solution is better.
> > >
> > > > Let me try to propose something else to solve your issue:
> > > >
> > > > 1/ At init, the primary process allocates a struct in shared memory
> > > > (named memzone):
> > > >
> > > > struct rte_mempool_shared_ops {
> > > > size_t num_mempool_ops;
> > > > struct {
> > > > char name[RTE_MEMPOOL_OPS_NAMESIZE];
> > > > } mempool_ops[RTE_MEMPOOL_MAX_OPS_IDX];
> > > > char *mempool_ops_name[RTE_MEMPOOL_MAX_OPS_IDX];
> > > > rte_spinlock_t mempool;
> > > > }
> > > >
> > > > 2/ When we register a mempool ops, we first get a name and id from the
> > > > shared struct: with the lock held, lookup for the registered name and
> > > > return its index, else get the last id and copy the name in the struct.
> > > >
> > > > 3/ Then do as before (in the per-process global table), except that we
> > > > reuse the registered id.
> > > >
> > > > We can remove the num_ops field from rte_mempool_ops_table.
> > > >
> > > > Thoughts?
> >
> > It seems better, just adding Anatoly and Bruce who know more about multiprocess.
> >
> > Tonghao, could you add a unit test to exhibit the issue as part of this work?
> >
> > Thanks.
> Hi Olivier
> any progress?will apply this patch or wait your patch?
Sorry if it wasn't clear, but my proposition was just an idea, I have no
time yet to work on it. Feel free to implement it by yourself, and I'll
help to review the patches.
Thanks,
Olivier
next prev parent reply other threads:[~2020-03-16 7:55 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-02 1:57 [dpdk-dev] [PATCH] " xiangxia.m.yue
2020-03-02 13:45 ` Jerin Jacob
2020-03-04 13:17 ` Tonghao Zhang
2020-03-04 13:33 ` Jerin Jacob
2020-03-04 14:46 ` Tonghao Zhang
2020-03-04 15:14 ` Jerin Jacob
2020-03-04 15:25 ` Tonghao Zhang
2020-03-05 8:20 ` [dpdk-dev] [PATCH dpdk-dev v2] " xiangxia.m.yue
2020-03-05 16:57 ` Olivier Matz
2020-03-06 13:36 ` [dpdk-dev] [PATCH dpdk-dev v3] " xiangxia.m.yue
2020-03-06 13:37 ` Jerin Jacob
2020-03-07 12:51 ` Andrew Rybchenko
2020-03-07 12:54 ` Andrew Rybchenko
2020-03-09 3:01 ` Tonghao Zhang
2020-03-09 8:27 ` Olivier Matz
2020-03-09 8:55 ` Tonghao Zhang
2020-03-09 9:05 ` Olivier Matz
2020-03-09 13:15 ` David Marchand
2020-03-16 7:43 ` Tonghao Zhang
2020-03-16 7:55 ` Olivier Matz [this message]
2020-03-24 9:35 ` Andrew Rybchenko
2020-03-24 12:41 ` Tonghao Zhang
2020-04-09 10:52 ` [dpdk-dev] [PATCH dpdk-dev 1/2] eal: introduce last-init queue for libraries initialization xiangxia.m.yue
2020-04-09 10:53 ` [dpdk-dev] [PATCH dpdk-dev 2/2] mempool: use shared memzone for rte_mempool_ops xiangxia.m.yue
2020-04-09 11:31 ` [dpdk-dev] [PATCH dpdk-dev 1/2] eal: introduce last-init queue for libraries initialization Jerin Jacob
2020-04-09 15:04 ` Tonghao Zhang
2020-04-09 15:02 ` [dpdk-dev] [PATCH dpdk-dev v2 1/2] eal: introduce rte-init " xiangxia.m.yue
2020-04-09 15:02 ` [dpdk-dev] [PATCH dpdk-dev v2 2/2] mempool: use shared memzone for rte_mempool_ops xiangxia.m.yue
2020-04-10 6:18 ` [dpdk-dev] [PATCH dpdk-dev v2 1/2] eal: introduce rte-init queue for libraries initialization Jerin Jacob
2020-04-10 13:11 ` Jerin Jacob
2020-04-12 3:20 ` Tonghao Zhang
2020-04-12 3:32 ` Tonghao Zhang
2020-04-13 11:32 ` Jerin Jacob
2020-04-13 14:21 ` [dpdk-dev] [PATCH dpdk-dev v3 " xiangxia.m.yue
2020-04-13 14:21 ` [dpdk-dev] [PATCH dpdk-dev v3 2/2] mempool: use shared memzone for rte_mempool_ops xiangxia.m.yue
2020-04-16 22:27 ` Thomas Monjalon
2020-04-27 8:03 ` Tonghao Zhang
2020-04-27 11:40 ` Thomas Monjalon
2020-04-27 12:51 ` Tonghao Zhang
2020-04-28 13:22 ` Tonghao Zhang
2020-05-04 7:42 ` Olivier Matz
2021-03-25 14:24 ` David Marchand
2020-04-23 13:38 ` Andrew Rybchenko
2020-04-27 5:23 ` Tonghao Zhang
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=20200316075549.GH17125@platinum \
--to=olivier.matz@6wind.com \
--cc=anatoly.burakov@intel.com \
--cc=artem.andreev@oktetlabs.ru \
--cc=arybchenko@solarflare.com \
--cc=bruce.richardson@intel.com \
--cc=david.marchand@redhat.com \
--cc=dev@dpdk.org \
--cc=gage.eads@intel.com \
--cc=hemant.agrawal@nxp.com \
--cc=jerinj@marvell.com \
--cc=jerinjacobk@gmail.com \
--cc=ndabilpuram@marvell.com \
--cc=vattunuru@marvell.com \
--cc=xiangxia.m.yue@gmail.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).