From: santosh <santosh.shukla@caviumnetworks.com>
To: Olivier MATZ <olivier.matz@6wind.com>
Cc: dev@dpdk.org, thomas@monjalon.net,
jerin.jacob@caviumnetworks.com, hemant.agrawal@nxp.com
Subject: Re: [dpdk-dev] [PATCH v4 2/2] ethdev: get the supported pools for a port
Date: Fri, 29 Sep 2017 06:00:13 +0100 [thread overview]
Message-ID: <385a9723-9831-e5c0-6d4a-ecd69d0f34e3@caviumnetworks.com> (raw)
In-Reply-To: <8b832367-e8fa-077a-1732-50627e977f9c@caviumnetworks.com>
Hi Olivier,
On Monday 25 September 2017 10:52 PM, santosh wrote:
> Hi Olivier,
>
>
> On Monday 25 September 2017 08:37 AM, Olivier MATZ wrote:
>>> +{
>>> + struct rte_eth_dev *dev;
>>> + const char *tmp;
>>> +
>>> + RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
>>> +
>>> + if (pool == NULL)
>>> + return -EINVAL;
>>> +
>>> + dev = &rte_eth_devices[port_id];
>>> +
>>> + if (*dev->dev_ops->pools_ops_supported == NULL) {
>>> + tmp = rte_eal_mbuf_default_mempool_ops();
>>> + if (!strcmp(tmp, pool))
>>> + return 0;
>>> + else
>>> + return -ENOTSUP;
>> I don't understand why we are comparing with
>> rte_eal_mbuf_default_mempool_ops().
>>
>> It means that the result of the function would be influenced
>> by the parameter given by the user.
> But that will be only for ops not supported case and in that case,
> function _must_ make sure that if inputted param is _default_ops_name
> then function should return ops supported correct info (whether
> returning '0' : Best ops or '1': ops does support
> , this part is arguable.. meaning One can say that default_ops ='handle-name' is best possible handle Or
> one of handle which platform supports).
>
>> I think that a PMD that does not implement ->pools_ops_supported
>> should always return 1 (mempool is supported).
> Return 1 says: PMD support this ops..
>
> So if ops is not supported and func returns with 1, then which ops application will use?
> If that ops is default_ops.. then How application will distinguish when to use default ops or
> param ops?.. as because in both cases func will return with value 1.
>
> The approach in the patch takes care of that condition and func will return -ENOTSUP
> if (ops not support || inputted param not matching with default ops) otherwise will return
> 0 or 1.
>
> At application side;
> For error case: In case of -ENOTSUP, its upto application to use _default_ops or exit.
> For good case: 0 or 1 case, func gaurantee that handle is either best handle for pool or pool supports
> that handle.. However in your suggestion if ops not supported case returns 1 then application is not
> sure which ops to use.. default_ops Or input ops given to func.
>
> make sense?
Ping? Are you fine with said explanation if not then would you
share your thought in case if ops not supported returns simply
1 if then how application differentiate whether to use
default_ops Or inputted param ops.. as return value 1 holds true
for both cases, so how application will pick and choose which ops
to use?
Can we pl. close on this? need to send v5 for -rc1 release.
Thanks.
next prev parent reply other threads:[~2017-09-29 5:00 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-01 8:05 [dpdk-dev] [PATCH 0/2] Allow application set mempool handle Santosh Shukla
2017-06-01 8:05 ` [dpdk-dev] [PATCH 1/2] eal: Introducing option to " Santosh Shukla
2017-06-30 14:12 ` Olivier Matz
2017-07-04 12:33 ` santosh
2017-06-01 8:05 ` [dpdk-dev] [PATCH 2/2] ether/ethdev: Allow pmd to advertise preferred pool capability Santosh Shukla
2017-06-30 14:13 ` Olivier Matz
2017-07-04 12:39 ` santosh
2017-07-04 13:07 ` Olivier Matz
2017-07-04 14:12 ` Jerin Jacob
2017-06-19 11:52 ` [dpdk-dev] [PATCH 0/2] Allow application set mempool handle Hemant Agrawal
2017-06-19 13:01 ` Jerin Jacob
2017-06-20 10:37 ` Hemant Agrawal
2017-06-20 14:04 ` Jerin Jacob
2017-06-30 14:12 ` Olivier Matz
2017-07-04 12:25 ` santosh
2017-07-04 15:59 ` Olivier Matz
2017-07-05 7:48 ` santosh
2017-07-20 7:06 ` [dpdk-dev] [PATCH v2 0/2] Dynamically configure " Santosh Shukla
2017-07-20 7:06 ` [dpdk-dev] [PATCH v2 1/2] eal: allow user to override default pool handle Santosh Shukla
2017-08-15 8:07 ` [dpdk-dev] [PATCH v3 0/2] Dynamically configure mempool handle Santosh Shukla
2017-08-15 8:07 ` [dpdk-dev] [PATCH v3 1/2] eal: allow user to override default pool handle Santosh Shukla
2017-09-04 11:46 ` Olivier MATZ
2017-09-07 9:25 ` Hemant Agrawal
2017-08-15 8:07 ` [dpdk-dev] [PATCH v3 2/2] ethdev: allow pmd to advertise " Santosh Shukla
2017-09-04 12:11 ` Olivier MATZ
2017-09-04 13:14 ` santosh
2017-09-07 9:21 ` Hemant Agrawal
2017-09-07 10:06 ` santosh
2017-09-07 10:11 ` santosh
2017-09-07 11:08 ` Hemant Agrawal
2017-09-11 9:33 ` Olivier MATZ
2017-09-11 12:40 ` santosh
2017-09-11 13:00 ` Olivier MATZ
2017-09-04 9:41 ` [dpdk-dev] [PATCH v3 0/2] Dynamically configure mempool handle Sergio Gonzalez Monroy
2017-09-04 13:20 ` santosh
2017-09-04 13:34 ` Olivier MATZ
2017-09-04 14:24 ` Sergio Gonzalez Monroy
2017-09-05 7:47 ` Olivier MATZ
2017-09-05 8:11 ` Jerin Jacob
2017-09-11 15:18 ` [dpdk-dev] [PATCH v4 " Santosh Shukla
2017-09-11 15:18 ` [dpdk-dev] [PATCH v4 1/2] eal: allow user to override default pool handle Santosh Shukla
2017-09-25 7:28 ` Olivier MATZ
2017-09-25 21:23 ` santosh
2017-09-11 15:18 ` [dpdk-dev] [PATCH v4 2/2] ethdev: get the supported pools for a port Santosh Shukla
2017-09-25 7:37 ` Olivier MATZ
2017-09-25 21:52 ` santosh
2017-09-29 5:00 ` santosh [this message]
2017-09-29 8:32 ` Olivier MATZ
2017-09-29 10:16 ` santosh
2017-09-29 11:21 ` santosh
2017-09-29 11:23 ` Olivier MATZ
2017-09-29 11:31 ` santosh
2017-09-13 10:00 ` [dpdk-dev] [PATCH v4 0/2] Dynamically configure mempool handle santosh
2017-09-19 8:28 ` santosh
2017-09-25 7:24 ` Olivier MATZ
2017-09-25 21:58 ` santosh
2017-10-01 9:14 ` [dpdk-dev] [PATCH v5 " Santosh Shukla
2017-10-01 9:14 ` [dpdk-dev] [PATCH v5 1/2] eal: allow user to override default pool handle Santosh Shukla
2017-10-02 14:29 ` Olivier MATZ
2017-10-06 0:29 ` Thomas Monjalon
2017-10-06 3:31 ` santosh
2017-10-06 8:39 ` Thomas Monjalon
2017-10-06 7:45 ` [dpdk-dev] [PATCH v6 0/2] Dynamically configure mempool handle Santosh Shukla
2017-10-06 7:45 ` [dpdk-dev] [PATCH v6 1/2] eal: allow user to override default pool handle Santosh Shukla
2017-10-06 7:45 ` [dpdk-dev] [PATCH v6 2/2] ethdev: get the supported pool for a port Santosh Shukla
2017-10-06 18:58 ` [dpdk-dev] [PATCH v6 0/2] Dynamically configure mempool handle Thomas Monjalon
2017-10-01 9:14 ` [dpdk-dev] [PATCH v5 2/2] ethdev: get the supported pool for a port Santosh Shukla
2017-10-02 14:31 ` Olivier MATZ
2017-10-06 0:30 ` Thomas Monjalon
2017-10-06 3:32 ` santosh
2017-10-02 8:37 ` [dpdk-dev] [PATCH v5 0/2] Dynamically configure mempool handle santosh
2017-07-20 7:06 ` [dpdk-dev] [PATCH v2 2/2] ethdev: allow pmd to advertise pool handle Santosh Shukla
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