[dpdk-dev] [PATCH v3 2/2] app/testpmd: only config supported RSS hash types
Xueming(Steven) Li
xuemingl at mellanox.com
Wed Apr 18 15:54:20 CEST 2018
> -----Original Message-----
> From: Adrien Mazarguil <adrien.mazarguil at 6wind.com>
> Sent: Wednesday, April 18, 2018 9:26 PM
> To: Xueming(Steven) Li <xuemingl at mellanox.com>
> Cc: Shahaf Shuler <shahafs at mellanox.com>; Nelio Laranjeiro <notifications at github.com>; Wenzhuo Lu
> <wenzhuo.lu at intel.com>; Jingjing Wu <jingjing.wu at intel.com>; Thomas Monjalon <thomas at monjalon.net>;
> dev at dpdk.org
> Subject: Re: [dpdk-dev] [PATCH v3 2/2] app/testpmd: only config supported RSS hash types
>
> Hi Xueming,
>
> On Wed, Apr 18, 2018 at 07:06:48PM +0800, Xueming Li wrote:
> > "port config all rss all" command will fail on PMD that not support
> > any of hard coding RSS hash types. This patch changed hard coding hash
> > types to supported types retrieved from device info.
> >
> > Signed-off-by: Xueming Li <xuemingl at mellanox.com>
>
> Problem is that this patch removes the ability to request "all" RSS types regardless of PMD support.
>
> Users will expect "all" to behave as documented, however doing so will only result in the limited set
> of types reported by PMDs. For instance at least
> mlx4 doesn't update the flow_type_rss_offloads field since it has never implemented configuration
> support for the legacy RSS API.
>
> You should add an argument with a different name (e.g. "supported" or
> "default") for that and keep the original meaning for "all".
>
> Testpmd documentation has to be updated accordingly.
You must want to have a look at first part of this patchset:
http://www.dpdk.org/ml/archives/dev/2018-April/097849.html
>
> One more nit below.
>
> > ---
> > app/test-pmd/cmdline.c | 7 +++++++
> > 1 file changed, 7 insertions(+)
> >
> > diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c index
> > 512e3b55e..d357de7e6 100644
> > --- a/app/test-pmd/cmdline.c
> > +++ b/app/test-pmd/cmdline.c
> > @@ -1998,6 +1998,7 @@ cmd_config_rss_parsed(void *parsed_result, {
> > struct cmd_config_rss *res = parsed_result;
> > struct rte_eth_rss_conf rss_conf = { .rss_key_len = 0, };
> > + struct rte_eth_dev_info dev_info = {0};
>
> This could be declared in the new block where it's used. Also note that "{0}" is nonstandard syntax,
> use memset() or initialize a field like rss_key_len above.
>
> > int diag;
> > uint8_t i;
> >
> > @@ -2034,6 +2035,12 @@ cmd_config_rss_parsed(void *parsed_result,
> > }
> > rss_conf.rss_key = NULL;
> > for (i = 0; i < rte_eth_dev_count(); i++) {
> > + if (!strcmp(res->value, "all")) {
> > + rte_eth_dev_info_get(i, &dev_info);
> > + if (dev_info.flow_type_rss_offloads)
> > + rss_conf.rss_hf =
> > + dev_info.flow_type_rss_offloads;
> > + }
> > diag = rte_eth_dev_rss_hash_update(i, &rss_conf);
> > if (diag < 0)
> > printf("Configuration of RSS hash at ethernet port %d "
> > --
> > 2.13.3
> >
>
>
> --
> Adrien Mazarguil
> 6WIND
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