From: David Marchand <david.marchand@redhat.com>
To: "Van Haaren, Harry" <harry.van.haaren@intel.com>
Cc: dev <dev@dpdk.org>, "Rao, Nikhil" <nikhil.rao@intel.com>
Subject: Re: [dpdk-dev] [PATCH] service: improve service run performance
Date: Fri, 18 Oct 2019 06:10:39 +0200 [thread overview]
Message-ID: <CAJFAV8xK-eNVgT0o+9z-nqvn4x40NwEjO=6Y2OFipcJ8RBvJbQ@mail.gmail.com> (raw)
In-Reply-To: <E923DB57A917B54B9182A2E928D00FA6759078D3@IRSMSX102.ger.corp.intel.com>
On Mon, Oct 7, 2019 at 5:37 PM Van Haaren, Harry
<harry.van.haaren@intel.com> wrote:
>
> > -----Original Message-----
> > From: David Marchand [mailto:david.marchand@redhat.com]
> > Sent: Monday, October 7, 2019 3:53 PM
> > To: Van Haaren, Harry <harry.van.haaren@intel.com>
> > Cc: dev <dev@dpdk.org>; Rao, Nikhil <nikhil.rao@intel.com>
> > Subject: Re: [dpdk-dev] [PATCH] service: improve service run performance
> >
> > On Mon, Sep 16, 2019 at 12:01 PM Nikhil Rao <nikhil.rao@intel.com> wrote:
> > >
> > > For a valid service, the core mask of the service
> > > is checked against the current core and the corresponding
> > > entry in the active_on_lcore array is set or reset.
> > >
> > > Upto 8 cores share the same cache line for their
> > > service active_on_lcore array entries since each entry is a uint8_t.
> > > Some number of these entries also share the cache line with
> > > the internal_flags member of struct rte_service_spec_impl,
> > > hence this false sharing also makes the service_valid() check
> > > expensive.
> > >
> > > Eliminate false sharing by moving the active_on_lcore array to
> > > a per-core data structure. The array is now indexed by service id.
Acked-by: Gage Eads <gage.eads@intel.com>
> >
> > Harry, any comments on this patch?
>
>
> Looks good to me, thanks Nikhil & David for the ping;
>
> Acked-by: Harry van Haaren <harry.van.haaren@intel.com>
Applied, thanks.
--
David Marchand
next prev parent reply other threads:[~2019-10-18 4:10 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-16 10:01 Nikhil Rao
2019-10-07 14:52 ` David Marchand
2019-10-07 15:37 ` Van Haaren, Harry
2019-10-18 4:10 ` David Marchand [this message]
2019-10-07 14:52 Eads, Gage
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