[PATCH v2 1/6] examples/l3fwd: fix lcore ID restriction

[Tummala, Sivaprasad]

[AMD Official Use Only - General]

Hi Konstantin,

> -----Original Message-----
> From: Konstantin Ananyev <konstantin.ananyev at huawei.com>
> Sent: Tuesday, December 19, 2023 8:40 PM
> To: Tummala, Sivaprasad <Sivaprasad.Tummala at amd.com>;
> david.hunt at intel.com; anatoly.burakov at intel.com; jerinj at marvell.com;
> radu.nicolau at intel.com; gakhil at marvell.com; cristian.dumitrescu at intel.com; Yigit,
> Ferruh <Ferruh.Yigit at amd.com>
> Cc: dev at dpdk.org; stable at dpdk.org
> Subject: RE: [PATCH v2 1/6] examples/l3fwd: fix lcore ID restriction
>
> Caution: This message originated from an External Source. Use proper caution
> when opening attachments, clicking links, or responding.
>
>
> Hi Sivaprasad,
>
> >
> > Hi Konstantin,
> >
> > > -----Original Message-----
> > > From: Konstantin Ananyev <konstantin.ananyev at huawei.com>
> > > Sent: Tuesday, December 19, 2023 6:00 PM
> > > To: Konstantin Ananyev <konstantin.ananyev at huawei.com>; Tummala,
> > > Sivaprasad <Sivaprasad.Tummala at amd.com>; david.hunt at intel.com;
> > > anatoly.burakov at intel.com; jerinj at marvell.com;
> > > radu.nicolau at intel.com; gakhil at marvell.com;
> > > cristian.dumitrescu at intel.com; Yigit, Ferruh <Ferruh.Yigit at amd.com>
> > > Cc: dev at dpdk.org; stable at dpdk.org
> > > Subject: RE: [PATCH v2 1/6] examples/l3fwd: fix lcore ID restriction
> > >
> > > Caution: This message originated from an External Source. Use proper
> > > caution when opening attachments, clicking links, or responding.
> > >
> > >
> > > >
> > > > > Currently the config option allows lcore IDs up to 255,
> > > > > irrespective of RTE_MAX_LCORES and needs to be fixed.
> > > > >
> > > > > The patch allows config options based on DPDK config.
> > > > >
> > > > > Fixes: af75078fece3 ("first public release")
> > > > > Cc: stable at dpdk.org
> > > > >
> > > > > Signed-off-by: Sivaprasad Tummala <sivaprasad.tummala at amd.com>
> > > > > ---
> > > > >  examples/l3fwd/main.c | 19 +++++++++++--------
> > > > >  1 file changed, 11 insertions(+), 8 deletions(-)
> > > > >
> > > > > diff --git a/examples/l3fwd/main.c b/examples/l3fwd/main.c index
> > > > > 3bf28aec0c..ed116da09c 100644
> > > > > --- a/examples/l3fwd/main.c
> > > > > +++ b/examples/l3fwd/main.c
> > > > > @@ -99,7 +99,7 @@ struct parm_cfg parm_config;  struct
> > > > > lcore_params {
> > > > >     uint16_t port_id;
> > > > >     uint8_t queue_id;
> > >
> > > Actually one comment:
> > > As lcore_id becomes uint16_t it might be worth to do the same
> > > queue_id, they usually are very much related.
> > Yes, that's a valid statement for one network interface.
> > With multiple interfaces, it's a combination of port/queue that maps to a specific
> lcore.
> > If there a NICs that support more than 256 queues, then it makes sense
> > to change the queue_id type as well.
>
> AFAIK, majority of modern NICs do support more than 256 queues.
> That's why in rte_ethev API queue_id is uint16_t.
Thanks. Will update the queue_id type to uint16_t in next version.
>
> >
> > Please let me know your thoughts.
> > >
> > > > > -   uint8_t lcore_id;
> > > > > +   uint16_t lcore_id;
> > > > >  } __rte_cache_aligned;
> > > > >
> > > > >  static struct lcore_params
> > > > > lcore_params_array[MAX_LCORE_PARAMS];
> > > > > @@ -292,8 +292,8 @@ setup_l3fwd_lookup_tables(void)  static int
> > > > >  check_lcore_params(void)
> > > > >  {
> > > > > -   uint8_t queue, lcore;
> > > > > -   uint16_t i;
> > > > > +   uint8_t queue;
> > > > > +   uint16_t i, lcore;
> > > > >     int socketid;
> > > > >
> > > > >     for (i = 0; i < nb_lcore_params; ++i) { @@ -304,12 +304,12
> > > > > @@
> > > > > check_lcore_params(void)
> > > > >             }
> > > > >             lcore = lcore_params[i].lcore_id;
> > > > >             if (!rte_lcore_is_enabled(lcore)) {
> > > > > -                   printf("error: lcore %hhu is not enabled in lcore mask\n",
> lcore);
> > > > > +                   printf("error: lcore %hu is not enabled in
> > > > > + lcore mask\n", lcore);
> > > > >                     return -1;
> > > > >             }
> > > > >             if ((socketid = rte_lcore_to_socket_id(lcore) != 0) &&
> > > > >                     (numa_on == 0)) {
> > > > > -                   printf("warning: lcore %hhu is on socket %d with numa off
> \n",
> > > > > +                   printf("warning: lcore %hu is on socket %d
> > > > > + with numa off\n",
> > > > >                             lcore, socketid);
> > > > >             }
> > > > >     }
> > > > > @@ -359,7 +359,7 @@ static int
> > > > >  init_lcore_rx_queues(void)
> > > > >  {
> > > > >     uint16_t i, nb_rx_queue;
> > > > > -   uint8_t lcore;
> > > > > +   uint16_t lcore;
> > > > >
> > > > >     for (i = 0; i < nb_lcore_params; ++i) {
> > > > >             lcore = lcore_params[i].lcore_id; @@ -500,6 +500,8
> > > > > @@ parse_config(const char *q_arg)
> > > > >     char *str_fld[_NUM_FLD];
> > > > >     int i;
> > > > >     unsigned size;
> > > > > +   unsigned int max_fld[_NUM_FLD] = {RTE_MAX_ETHPORTS,
> > > > > +                                   255, RTE_MAX_LCORE};
> > > > >
> > > > >     nb_lcore_params = 0;
> > > > >
> > > > > @@ -518,7 +520,8 @@ parse_config(const char *q_arg)
> > > > >             for (i = 0; i < _NUM_FLD; i++){
> > > > >                     errno = 0;
> > > > >                     int_fld[i] = strtoul(str_fld[i], &end, 0);
> > > > > -                   if (errno != 0 || end == str_fld[i] || int_fld[i] > 255)
> > > > > +                   if (errno != 0 || end == str_fld[i] ||
> > > > > + int_fld[i] >
> > > > > +
> > > > > + max_fld[i])
> > > > >                             return -1;
> > > > >             }
> > > > >             if (nb_lcore_params >= MAX_LCORE_PARAMS) { @@ -531,7
> > > > > +534,7 @@ parse_config(const char *q_arg)
> > > > >             lcore_params_array[nb_lcore_params].queue_id =
> > > > >                     (uint8_t)int_fld[FLD_QUEUE];
> > > > >             lcore_params_array[nb_lcore_params].lcore_id =
> > > > > -                   (uint8_t)int_fld[FLD_LCORE];
> > > > > +                   (uint16_t)int_fld[FLD_LCORE];
> > > > >             ++nb_lcore_params;
> > > > >     }
> > > > >     lcore_params = lcore_params_array;
> > > > > --
> > > >
> > > > Acked-by: Konstantin Ananyev <konstantin.ananyev at huawei.com>
> > > >
> > > >
> > > > > 2.25.1