Re: [dpdk-dev] [PATCH v1] app/testpmd: set default RSS key as NULL

[Ophir Munk <ophirmu@mellanox.com>]

Hi Zhao,
The patch which causes your crash is already reverted (see [1]). 
You can find it with head of next-net or in RC3 (once it is issued).
Please re-test your case after applying the reverting patch.

Regards,
Ophir

[1]
Commit 8773db152033 ("app/testpmd: revert setting default RSS")

> -----Original Message-----
> From: Zhao1, Wei [mailto:wei.zhao1@intel.com]
> Sent: Wednesday, November 14, 2018 7:25 AM
> To: Ophir Munk <ophirmu@mellanox.com>; Lu, Wenzhuo
> <wenzhuo.lu@intel.com>; Wu, Jingjing <jingjing.wu@intel.com>; Iremonger,
> Bernard <bernard.iremonger@intel.com>; dev@dpdk.org; Peng, Yuan
> <yuan.peng@intel.com>
> Cc: Asaf Penso <asafp@mellanox.com>; Shahaf Shuler
> <shahafs@mellanox.com>; Thomas Monjalon <thomas@monjalon.net>;
> Olga Shern <olgas@mellanox.com>; Yongseok Koh <yskoh@mellanox.com>
> Subject: RE: [PATCH v1] app/testpmd: set default RSS key as NULL
> 
> Hi, Ophir Munk
> 
> 	Peng yuan has find this problem with patch , if you  use the following
> test step, You will find the problem.
> She is using i40e nic.
> 
> ./x86_64-native-linuxapp-gcc/app/testpmd -c 1ffff -n 4 - -i --nb-cores=8 --
> rxq=4 --txq=4 --port-topology=chained ...............
> testpmd> start
> testpmd> flow create 0 ingress pattern end actions rss types ipv4-udp
> testpmd> end key 67108863 / end
>  Segmentation fault (core dumped)
> 
> 
> > -----Original Message-----
> > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Ophir Munk
> > Sent: Saturday, November 3, 2018 11:55 PM
> > To: Lu, Wenzhuo <wenzhuo.lu@intel.com>; Wu, Jingjing
> > <jingjing.wu@intel.com>; Iremonger, Bernard
> > <bernard.iremonger@intel.com>; dev@dpdk.org
> > Cc: Asaf Penso <asafp@mellanox.com>; Shahaf Shuler
> > <shahafs@mellanox.com>; Thomas Monjalon <thomas@monjalon.net>;
> Olga
> > Shern <olgas@mellanox.com>; Ophir Munk <ophirmu@mellanox.com>;
> > Yongseok Koh <yskoh@mellanox.com>
> > Subject: [dpdk-dev] [PATCH v1] app/testpmd: set default RSS key as
> > NULL
> >
> > When creating an RSS rule without specifying a key (see [1]) it is
> > expected that the device will use the default key.
> > A NULL key is uded to indicate to a PMD it should use its default key,
> > however testpmd assigns a non-NULL dummy key (see [2]) instead.
> > This does not enable testing any PMD behavior when the RSS key is not
> > specified. This commit fixes this limitation by setting key to NULL.
> >
> > [1]
> > RSS rule example without specifying a key:
> > flow create 0 ingress <pattern> / end actions rss queues 0 1 end / end
> > [2] Testpmd default key assignment:
> > .key= "testpmd's default RSS hash key, "
> > "override it for better balancing"
> >
> > Signed-off-by: Ophir Munk <ophirmu@mellanox.com>
> > ---
> > v1: Initial version
> >
> >  app/test-pmd/cmdline_flow.c | 15 ++-------------
> >  1 file changed, 2 insertions(+), 13 deletions(-)
> >
> > diff --git a/app/test-pmd/cmdline_flow.c b/app/test-pmd/cmdline_flow.c
> > index 23ea7cc..91e2e35 100644
> > --- a/app/test-pmd/cmdline_flow.c
> > +++ b/app/test-pmd/cmdline_flow.c
> > @@ -3248,26 +3248,15 @@ static int comp_vc_action_rss_queue(struct
> > context *, const struct token *,
> >  			.func = RTE_ETH_HASH_FUNCTION_DEFAULT,
> >  			.level = 0,
> >  			.types = rss_hf,
> > -			.key_len = sizeof(action_rss_data->key),
> > +			.key_len = 0,
> >  			.queue_num = RTE_MIN(nb_rxq,
> > ACTION_RSS_QUEUE_NUM),
> > -			.key = action_rss_data->key,
> > +			.key = NULL,
> >  			.queue = action_rss_data->queue,
> >  		},
> > -		.key = "testpmd's default RSS hash key, "
> > -			"override it for better balancing",
> >  		.queue = { 0 },
> >  	};
> >  	for (i = 0; i < action_rss_data->conf.queue_num; ++i)
> >  		action_rss_data->queue[i] = i;
> > -	if (!port_id_is_invalid(ctx->port, DISABLED_WARN) &&
> > -	    ctx->port != (portid_t)RTE_PORT_ALL) {
> > -		struct rte_eth_dev_info info;
> > -
> > -		rte_eth_dev_info_get(ctx->port, &info);
> > -		action_rss_data->conf.key_len =
> > -			RTE_MIN(sizeof(action_rss_data->key),
> > -				info.hash_key_size);
> > -	}
> >  	action->conf = &action_rss_data->conf;
> >  	return ret;
> >  }
> > --
> > 1.8.3.1