From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Phil Yang (Arm Technology China)" <Phil.Yang@arm.com>
Subject: Re: [PATCH v2 1/3] packet_ordering: add statistics for
 each worker thread
Date: Sat, 30 Mar 2019 16:55:22 +0000
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Cc: "Hunt, David" <david.hunt@intel.com>, "Gavin Hu (Arm Technology China)"
 <Gavin.Hu@arm.com>, Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>, nd
 <nd@arm.com>, nd <nd@arm.com>
To: "Pattan, Reshma" <reshma.pattan@intel.com>, "dev@dpdk.org" <dev@dpdk.org>,
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> -----Original Message-----
> From: Pattan, Reshma <reshma.pattan@intel.com>
> Sent: Saturday, March 30, 2019 12:40 AM
> To: Phil Yang (Arm Technology China) <Phil.Yang@arm.com>; dev@dpdk.org;
> thomas@monjalon.net
> Cc: Hunt, David <david.hunt@intel.com>; Gavin Hu (Arm Technology China)
> <Gavin.Hu@arm.com>; Honnappa Nagarahalli
> <Honnappa.Nagarahalli@arm.com>; nd <nd@arm.com>
> Subject: RE: [PATCH v2 1/3] packet_ordering: add statistics for each work=
er
> thread
>=20
>=20
>=20
> > -----Original Message-----
> > From: Phil Yang [mailto:phil.yang@arm.com]
> >
> > The current implementation using '__sync' built-ins to synchronize
> > statistics within worker threads. '__sync' built-ins functions are
> > full barriers which will affect the performance, so add a per worker pa=
ckets
> statistics.
> >
> > Enable by option --insight-worker.
> >
>=20
> I don't feel the need of this new option to print per core stats.  Any re=
ason
> for this?

Hi Reshma,

Thanks for your comment.=20
The per core stats aims at removing the '__sync' builtin full barrier in th=
e worker thread.=20
It records the workload of each core (It shows the bottleneck core as well)=
.  Since the maximum core number may be more than 128, so disable the print=
 in default and add this new option for debugging use.=20

Anyway, if you insist there is no need to print that info out, I can remove=
 the option. But I think using per core stats will benefit performance.

Thanks,
Phil

>=20
> Thanks,
> Reshma