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From: "Ajmera, Megha" <megha.ajmera@intel.com>
To: Stephen Hemminger <stephen@networkplumber.org>
CC: "dev@dpdk.org" <dev@dpdk.org>, "Mcnamara, John" <john.mcnamara@intel.com>,
"Singh, Jasvinder" <jasvinder.singh@intel.com>, "Dumitrescu, Cristian"
<cristian.dumitrescu@intel.com>, "Yigit, Ferruh" <ferruh.yigit@intel.com>,
"Thakur, Sham Singh" <sham.singh.thakur@intel.com>
Subject: RE: [PATCH v1] sched: enable/disable TC OV at runtime
Thread-Topic: [PATCH v1] sched: enable/disable TC OV at runtime
Thread-Index: AQHYNLz/wHdsUuHBrEGNn1mvgkrEb6y5tuYg
Date: Fri, 11 Mar 2022 06:24:35 +0000
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>=20
> > diff --git a/lib/sched/rte_sched.c b/lib/sched/rte_sched.c index
> > ec74bee939..1d05089d00 100644
> > --- a/lib/sched/rte_sched.c
> > +++ b/lib/sched/rte_sched.c
> > @@ -155,6 +155,7 @@ struct rte_sched_subport {
> > uint64_t tc_credits[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
> >
> > /* TC oversubscription */
> > + uint8_t is_tc_ov_enabled;
> > uint64_t tc_ov_wm;
> > uint64_t tc_ov_wm_min;
> > uint64_t tc_ov_wm_max;
>=20
> Putting the field there creates a hole in the structure.
> Put it after tc_ov and fill an existing hole.
>=20
> This is pahole of current code, looks like this struct could use some wor=
k to be
> better packed and aligned.
>
Thanks Stephen for pointing this out. I agree there is some work needed to =
pack this structure better.
Can we take this up in a separate patch in later release as it requires mor=
e performance test runs to see the impact ?
=20