From: "Morten Brørup" <mb@smartsharesystems.com>
To: "Stephen Hemminger" <stephen@networkplumber.org>
Cc: "David Marchand" <david.marchand@redhat.com>, <dev@dpdk.org>,
<konstantin.v.ananyev@yandex.ru>
Subject: RE: [PATCH] dumpcap: fix mbuf pool ring type
Date: Tue, 7 Nov 2023 08:22:37 +0100 [thread overview]
Message-ID: <98CBD80474FA8B44BF855DF32C47DC35E9EFE8@smartserver.smartshare.dk> (raw)
In-Reply-To: <20231106183618.79ab6f93@hermes.local>
> From: Stephen Hemminger [mailto:stephen@networkplumber.org]
> Sent: Tuesday, 7 November 2023 03.36
>
> On Mon, 6 Nov 2023 22:50:50 +0100
> Morten Brørup <mb@smartsharesystems.com> wrote:
>
> > > > And I guess there might be other use cases than this one, where a
> > > thread-safe mempool driver is required. So adding a generalized
> > > function to get the "upgraded" (i.e. thread safe) variant of a
> mempool
> > > driver would be nice.
> > > > </feature creep>
> > >
> > > If the user overrides the default mbuf pool type, then it will need
> to
> > > be thread safe for
> > > the general case of driver as well (or they are on single cpu).
> >
> > If they have chosen a thread safe pool type, using the chosen type
> will work for dumpcap too. I think we all agree on that.
> >
> > I'm not sure I understand your single-cpu argument, so let me try to
> paraphrase:
> >
> > If their application only uses one EAL thread, and they have chosen
> "ring_sc_sp", dumpcap also work, because mempool accesses are still
> single-threaded. Is this correctly understood?
> >
> > Or are you saying that if they want to use dumpcap, they must choose
> a thread safe pool type for their application (regardless if the
> application is single-threaded or not)?
>
> There is no command line of EAL nature in dumpcap.
> This is intentional.
> QED: overriding default pool type is not going to be a possible
The preferred mbuf pool type can configured in the primary process by EAL params. If so configured, it is stored in a memzone named "mbuf_user_pool_ops".
And if it is set there, the secondary process will also use it as its preferred mbuf pool type.
next prev parent reply other threads:[~2023-11-07 7:22 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-04 16:16 Stephen Hemminger
2023-08-05 9:05 ` Morten Brørup
2023-10-02 7:33 ` David Marchand
2023-10-02 8:42 ` Morten Brørup
2023-11-06 19:23 ` Stephen Hemminger
2023-11-06 21:50 ` Morten Brørup
2023-11-07 2:36 ` Stephen Hemminger
2023-11-07 7:22 ` Morten Brørup [this message]
2023-11-07 16:41 ` Stephen Hemminger
2023-11-07 17:38 ` Morten Brørup
2023-11-08 16:50 ` Stephen Hemminger
2023-11-08 17:43 ` Morten Brørup
2023-11-07 17:00 ` Stephen Hemminger
2023-11-06 19:24 ` Stephen Hemminger
2023-11-06 19:34 ` [PATCH v2] " Stephen Hemminger
2023-11-08 17:47 ` [PATCH v3 ] " Stephen Hemminger
2023-11-09 7:21 ` Morten Brørup
2023-11-12 14:05 ` Thomas Monjalon
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