From: "Ouyang, Changchun" <changchun.ouyang@intel.com>
To: Vlad Zolotarov <vladz@cloudius-systems.com>,
"dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH v4 4/6] ether: Check VMDq RSS mode
Date: Wed, 7 Jan 2015 02:28:50 +0000 [thread overview]
Message-ID: <F52918179C57134FAEC9EA62FA2F9625119508AF@shsmsx102.ccr.corp.intel.com> (raw)
In-Reply-To: <54AC3DD7.60604@cloudius-systems.com>
> -----Original Message-----
> From: Vlad Zolotarov [mailto:vladz@cloudius-systems.com]
> Sent: Wednesday, January 7, 2015 3:56 AM
> To: Ouyang, Changchun; dev@dpdk.org
> Subject: Re: [dpdk-dev] [PATCH v4 4/6] ether: Check VMDq RSS mode
>
>
> On 01/06/15 03:56, Ouyang, Changchun wrote:
> >> -----Original Message-----
> >> From: Vlad Zolotarov [mailto:vladz@cloudius-systems.com]
> >> Sent: Monday, January 5, 2015 6:10 PM
> >> To: Ouyang, Changchun;dev@dpdk.org
> >> Subject: Re: [dpdk-dev] [PATCH v4 4/6] ether: Check VMDq RSS mode
> >>
> >>
> >> On 01/05/15 03:00, Ouyang, Changchun wrote:
> >>>> -----Original Message-----
> >>>> From: Vlad Zolotarov [mailto:vladz@cloudius-systems.com]
> >>>> Sent: Sunday, January 4, 2015 5:46 PM
> >>>> To: Ouyang, Changchun;dev@dpdk.org
> >>>> Subject: Re: [dpdk-dev] [PATCH v4 4/6] ether: Check VMDq RSS mode
> >>>>
> >>>>
> >>>> On 01/04/15 10:58, Ouyang, Changchun wrote:
> >>>>>> -----Original Message-----
> >>>>>> From: Vlad Zolotarov [mailto:vladz@cloudius-systems.com]
> >>>>>> Sent: Sunday, January 4, 2015 4:45 PM
> >>>>>> To: Ouyang, Changchun;dev@dpdk.org
> >>>>>> Subject: Re: [dpdk-dev] [PATCH v4 4/6] ether: Check VMDq RSS
> mode
> >>>>>>
> >>>>>>
> >>>>>> On 01/04/15 09:18, Ouyang Changchun wrote:
> >>>>>>> Check mq mode for VMDq RSS, handle it correctly instead of
> >>>>>>> returning an error; Also remove the limitation of per pool queue
> >>>>>>> number has max value of 1, because the per pool queue number
> >> could
> >>>>>>> be 2 or 4 if it is VMDq RSS mode;
> >>>>>>>
> >>>>>>> The number of rxq specified in config will determine the mq mode
> >>>>>>> for
> >>>>>> VMDq RSS.
> >>>>>>> Signed-off-by: Changchun Ouyang<changchun.ouyang@intel.com>
> >>>>>>> ---
> >>>>>>> lib/librte_ether/rte_ethdev.c | 39
> >>>>>> ++++++++++++++++++++++++++++++++++-----
> >>>>>>> 1 file changed, 34 insertions(+), 5 deletions(-)
> >>>>>>>
> >>>>>>> diff --git a/lib/librte_ether/rte_ethdev.c
> >>>>>>> b/lib/librte_ether/rte_ethdev.c index 95f2ceb..59ff325 100644
> >>>>>>> --- a/lib/librte_ether/rte_ethdev.c
> >>>>>>> +++ b/lib/librte_ether/rte_ethdev.c
> >>>>>>> @@ -510,8 +510,7 @@ rte_eth_dev_check_mq_mode(uint8_t
> >> port_id,
> >>>>>>> uint16_t nb_rx_q, uint16_t nb_tx_q,
> >>>>>>>
> >>>>>>> if (RTE_ETH_DEV_SRIOV(dev).active != 0) {
> >>>>>>> /* check multi-queue mode */
> >>>>>>> - if ((dev_conf->rxmode.mq_mode ==
> >> ETH_MQ_RX_RSS) ||
> >>>>>>> - (dev_conf->rxmode.mq_mode ==
> >> ETH_MQ_RX_DCB) ||
> >>>>>>> + if ((dev_conf->rxmode.mq_mode ==
> >> ETH_MQ_RX_DCB) ||
> >>>>>>> (dev_conf->rxmode.mq_mode ==
> >> ETH_MQ_RX_DCB_RSS)
> >>>>>> ||
> >>>>>>> (dev_conf->txmode.mq_mode ==
> >> ETH_MQ_TX_DCB)) {
> >>>>>>> /* SRIOV only works in VMDq enable mode
> >> */ @@ -
> >>>>>> 525,7 +524,6 @@
> >>>>>>> rte_eth_dev_check_mq_mode(uint8_t port_id, uint16_t nb_rx_q,
> >>>>>> uint16_t nb_tx_q,
> >>>>>>> }
> >>>>>>>
> >>>>>>> switch (dev_conf->rxmode.mq_mode) {
> >>>>>>> - case ETH_MQ_RX_VMDQ_RSS:
> >>>>>>> case ETH_MQ_RX_VMDQ_DCB:
> >>>>>>> case ETH_MQ_RX_VMDQ_DCB_RSS:
> >>>>>>> /* DCB/RSS VMDQ in SRIOV mode, not
> >> implement
> >>>>>> yet */ @@ -534,6
> >>>>>>> +532,39 @@ rte_eth_dev_check_mq_mode(uint8_t port_id,
> uint16_t
> >>>>>> nb_rx_q, uint16_t nb_tx_q,
> >>>>>>> "unsupported VMDQ
> >> mq_mode
> >>>>>> rx %u\n",
> >>>>>>> port_id, dev_conf-
> >>>>>>> rxmode.mq_mode);
> >>>>>>> return (-EINVAL);
> >>>>>>> + case ETH_MQ_RX_RSS:
> >>>>>>> + PMD_DEBUG_TRACE("ethdev port_id=%"
> >> PRIu8
> >>>>>>> + " SRIOV active, "
> >>>>>>> + "Rx mq mode is changed
> >> from:"
> >>>>>>> + "mq_mode %u into VMDQ
> >>>>>> mq_mode %u\n",
> >>>>>>> + port_id,
> >>>>>>> + dev_conf-
> >>> rxmode.mq_mode,
> >>>>>>> + dev->data-
> >>>>>>> dev_conf.rxmode.mq_mode);
> >>>>>>> + case ETH_MQ_RX_VMDQ_RSS:
> >>>>>>> + dev->data->dev_conf.rxmode.mq_mode =
> >>>>>> ETH_MQ_RX_VMDQ_RSS;
> >>>>>>> + if (nb_rx_q <
> >>>>>> RTE_ETH_DEV_SRIOV(dev).nb_q_per_pool) {
> >>>> Missed that before: shouldn't it be "<=" here?
> >>> Agree with you, need <= here, I will fix it in v5
> >>>
> >>>>>>> + switch (nb_rx_q) {
> >>>>>>> + case 1:
> >>>>>>> + case 2:
> >>>>>>> +
> >> RTE_ETH_DEV_SRIOV(dev).active =
> >>>>>>> + ETH_64_POOLS;
> >>>>>>> + break;
> >>>>>>> + case 4:
> >>>>>>> +
> >> RTE_ETH_DEV_SRIOV(dev).active =
> >>>>>>> + ETH_32_POOLS;
> >>>>>>> + break;
> >>>>>>> + default:
> >>>>>>> +
> >> PMD_DEBUG_TRACE("ethdev
> >>>>>> port_id=%d"
> >>>>>>> + " SRIOV active, "
> >>>>>>> + "queue number
> >> invalid\n",
> >>>>>>> + port_id);
> >>>>>>> + return -EINVAL;
> >>>>>>> + }
> >>>>>>> +
> >> RTE_ETH_DEV_SRIOV(dev).nb_q_per_pool =
> >>>>>> nb_rx_q;
> >>>>>>> +
> >> RTE_ETH_DEV_SRIOV(dev).def_pool_q_idx =
> >>>>>>> + dev->pci_dev->max_vfs *
> >> nb_rx_q;
> >>>>>>> + }
> >>>>>> Don't u need to return an error in the "else" here?
> >>>>> Actually it has such a check after these code snippet, and it does
> >>>>> return error for the else case, Because it is original logic, I
> >>>>> don't change any
> >>>> code around it, so it doesn't display here, you can check the codes.
> >>>>
> >>>> I see. The flow is a bit confusing since the switch-case above will
> >>>> end up executing a "default" clause which will set
> >>>> RTE_ETH_DEV_SRIOV(dev).nb_q_per_pool to 1 and then the error
> >> message
> >>>> in the check u are referring will be a bit confusing.
> >>> ' set RTE_ETH_DEV_SRIOV(dev).nb_q_per_pool to 1 ' is original code,
> >> which is for vmdq only case, or single queue case.
> >>> It is in default clause, and not in VMDQ_RSS clause.
> >>> I think my new code is ok here.
> >> The original code is ok and your current code will work. The only
> >> problem with your new code is that in case on an error like I've
> >> described above the error message will be confusing.
> > Then what's your suggestion for the better log message? I can consider
> refine it if you have better one.
>
> Just like I've suggested before - u may break with appropriate error message
> right when u see the problem (in a "else" clause). This way the code will be
> both more readable and more robust and won't break if anybody decides to
> change the not-RSS-specific logic u r relying on.
Well, it couldn't be done so easily, I think, the test condition is:
if (nb_rx_q <= RTE_ETH_DEV_SRIOV(dev).nb_q_per_pool),
so the else clause is the case of nb_rx_q > RTE_ETH_DEV_SRIOV(dev).nb_q_per_pool,
its functionality is comparing nb_rx_q and RTE_ETH_DEV_SRIOV(dev).nb_q_per_pool,
but the switch case will further confine nb_rx_q to 1 or 2 or 4 on the condition of it passes the above test,
and also there are codes refine the RTE_ETH_DEV_SRIOV(dev).nb_q_per_pool etc.
just changing the return into break, will break the logic,
e.g.
when nb_rx_q is 8, and RTE_ETH_DEV_SRIOV(dev).nb_q_per_pool is 8,
the test pass, and go into default branch,
it just print some message and break,
continue refining(but nothing changed this time),
then check valid queue number a few lines below, this time it fail the test, because
nb_rx_q == rather than > RTE_ETH_DEV_SRIOV(dev).nb_q_per_pool , so it doesn't print err mesge and don't return the -EINVAL.
Then the behavior is not expected.
From other hand,
The reason why I have not the else branch for the test nb_rx_q <= RTE_ETH_DEV_SRIOV(dev).nb_q_per_pool,
It is because there is same check below itself, and just don't want the duplicated check for the same thing
> >>>>> Thanks
> >>>>> Changchun
> >>>>>
> >>>>>
next prev parent reply other threads:[~2015-01-07 2:29 UTC|newest]
Thread overview: 144+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-15 2:56 [dpdk-dev] [PATCH 0/6] Enable VF RSS for Niantic Ouyang Changchun
2014-12-15 2:57 ` [dpdk-dev] [PATCH 1/6] ixgbe: Code cleanup Ouyang Changchun
2014-12-15 2:57 ` [dpdk-dev] [PATCH 2/6] ixgbe: Negotiate VF API version Ouyang Changchun
2014-12-15 2:57 ` [dpdk-dev] [PATCH 3/6] ixgbe: Get VF queue number Ouyang Changchun
2014-12-15 2:57 ` [dpdk-dev] [PATCH 4/6] ether: Check VMDq RSS mode Ouyang Changchun
2014-12-15 2:57 ` [dpdk-dev] [PATCH 5/6] ixgbe: Config VF RSS Ouyang Changchun
2014-12-15 2:57 ` [dpdk-dev] [PATCH 6/6] testpmd: Set Rx VMDq RSS mode Ouyang Changchun
2014-12-15 10:55 ` [dpdk-dev] [PATCH 0/6] Enable VF RSS for Niantic Bruce Richardson
2014-12-16 0:58 ` Ouyang, Changchun
2014-12-24 2:56 ` [dpdk-dev] [PATCH v2 " Ouyang Changchun
2014-12-24 2:56 ` [dpdk-dev] [PATCH v2 1/6] ixgbe: Code cleanup Ouyang Changchun
2014-12-24 3:08 ` Zhang, Helin
2014-12-24 3:22 ` Ouyang, Changchun
2014-12-24 3:41 ` Zhang, Helin
2014-12-24 3:50 ` Ouyang, Changchun
2014-12-24 3:53 ` Zhang, Helin
2014-12-24 4:46 ` Ouyang, Changchun
2014-12-24 2:56 ` [dpdk-dev] [PATCH v2 2/6] ixgbe: Negotiate VF API version Ouyang Changchun
2014-12-24 2:56 ` [dpdk-dev] [PATCH v2 3/6] ixgbe: Get VF queue number Ouyang Changchun
2014-12-24 2:56 ` [dpdk-dev] [PATCH v2 4/6] ether: Check VMDq RSS mode Ouyang Changchun
2014-12-24 2:56 ` [dpdk-dev] [PATCH v2 5/6] ixgbe: Config VF RSS Ouyang Changchun
2014-12-24 2:56 ` [dpdk-dev] [PATCH v2 6/6] testpmd: Set Rx VMDq RSS mode Ouyang Changchun
2014-12-24 5:22 ` [dpdk-dev] [PATCH v3 0/6] Enable VF RSS for Niantic Ouyang Changchun
2014-12-24 5:22 ` [dpdk-dev] [PATCH v3 1/6] ixgbe: Code cleanup Ouyang Changchun
2014-12-24 5:23 ` [dpdk-dev] [PATCH v3 2/6] ixgbe: Negotiate VF API version Ouyang Changchun
2014-12-24 5:23 ` [dpdk-dev] [PATCH v3 3/6] ixgbe: Get VF queue number Ouyang Changchun
2014-12-24 5:23 ` [dpdk-dev] [PATCH v3 4/6] ether: Check VMDq RSS mode Ouyang Changchun
2014-12-24 5:23 ` [dpdk-dev] [PATCH v3 5/6] ixgbe: Config VF RSS Ouyang Changchun
2014-12-24 10:39 ` Vlad Zolotarov
2014-12-25 2:14 ` Ouyang, Changchun
2014-12-25 13:13 ` Vlad Zolotarov
2014-12-26 2:07 ` Ouyang, Changchun
2014-12-25 2:43 ` Ouyang, Changchun
2014-12-25 13:20 ` Vlad Zolotarov
2014-12-26 1:52 ` Ouyang, Changchun
2014-12-26 6:49 ` Vladislav Zolotarov
2014-12-26 7:26 ` Ouyang, Changchun
2014-12-26 7:37 ` Vladislav Zolotarov
2014-12-26 8:45 ` Ouyang, Changchun
2014-12-28 10:14 ` Vlad Zolotarov
2015-01-05 10:29 ` Bruce Richardson
2015-01-06 1:00 ` Ouyang, Changchun
2014-12-25 13:38 ` Vlad Zolotarov
2014-12-26 1:26 ` Ouyang, Changchun
2015-01-04 2:10 ` Liang, Cunming
2015-01-04 6:25 ` Ouyang, Changchun
2014-12-24 5:23 ` [dpdk-dev] [PATCH v3 6/6] testpmd: Set Rx VMDq RSS mode Ouyang Changchun
2014-12-24 9:59 ` [dpdk-dev] [PATCH v3 0/6] Enable VF RSS for Niantic Vlad Zolotarov
2014-12-25 1:46 ` Ouyang, Changchun
2015-01-05 10:38 ` Bruce Richardson
2015-01-05 13:02 ` Vlad Zolotarov
2015-01-06 1:11 ` Ouyang, Changchun
2015-01-06 11:18 ` Vlad Zolotarov
2015-01-06 11:18 ` Vlad Zolotarov
2015-01-06 1:04 ` Ouyang, Changchun
2014-12-24 10:49 ` Vlad Zolotarov
2014-12-25 2:26 ` Ouyang, Changchun
2014-12-25 12:46 ` Vlad Zolotarov
2014-12-26 2:37 ` Ouyang, Changchun
[not found] ` <CAOYyTHbrB-VinN5ZEd1tYTnS7_GhCT1jiHiZzNKkQUEJ1rG79w@mail.gmail.com>
2014-12-26 5:16 ` Vladislav Zolotarov
2014-12-26 5:25 ` Ouyang, Changchun
2015-01-04 7:18 ` [dpdk-dev] [PATCH v4 " Ouyang Changchun
2015-01-04 7:18 ` [dpdk-dev] [PATCH v4 1/6] ixgbe: Code cleanup Ouyang Changchun
2015-01-04 8:22 ` Vlad Zolotarov
2015-01-04 7:18 ` [dpdk-dev] [PATCH v4 2/6] ixgbe: Negotiate VF API version Ouyang Changchun
2015-01-04 8:26 ` Vlad Zolotarov
2015-01-04 8:30 ` Vlad Zolotarov
2015-01-04 8:37 ` Ouyang, Changchun
2015-01-04 8:40 ` Vlad Zolotarov
2015-01-04 8:51 ` Ouyang, Changchun
2015-01-04 9:37 ` Vlad Zolotarov
2015-01-04 7:18 ` [dpdk-dev] [PATCH v4 3/6] ixgbe: Get VF queue number Ouyang Changchun
2015-01-04 8:38 ` Vlad Zolotarov
2015-01-05 2:59 ` Ouyang, Changchun
2015-01-05 10:07 ` Vlad Zolotarov
2015-01-06 1:54 ` Ouyang, Changchun
2015-01-06 11:26 ` Vlad Zolotarov
2015-01-07 1:18 ` Ouyang, Changchun
2015-01-04 7:18 ` [dpdk-dev] [PATCH v4 4/6] ether: Check VMDq RSS mode Ouyang Changchun
2015-01-04 8:45 ` Vlad Zolotarov
2015-01-04 8:58 ` Ouyang, Changchun
2015-01-04 9:45 ` Vlad Zolotarov
2015-01-05 1:00 ` Ouyang, Changchun
2015-01-05 10:09 ` Vlad Zolotarov
2015-01-06 1:56 ` Ouyang, Changchun
2015-01-06 19:56 ` Vlad Zolotarov
2015-01-07 2:28 ` Ouyang, Changchun [this message]
2015-01-04 7:18 ` [dpdk-dev] [PATCH v4 5/6] ixgbe: Config VF RSS Ouyang Changchun
2015-01-04 7:18 ` [dpdk-dev] [PATCH v4 6/6] testpmd: Set Rx VMDq RSS mode Ouyang Changchun
2015-01-04 8:49 ` Vlad Zolotarov
2015-01-04 9:01 ` Ouyang, Changchun
2015-01-04 9:46 ` Vlad Zolotarov
2015-01-05 2:38 ` Ouyang, Changchun
2015-01-05 10:12 ` Vlad Zolotarov
2015-01-06 2:01 ` Ouyang, Changchun
2015-01-06 12:53 ` Vlad Zolotarov
2015-01-07 1:50 ` Ouyang, Changchun
2015-01-07 6:32 ` [dpdk-dev] [PATCH v5 0/6] Enable VF RSS for Niantic Ouyang Changchun
2015-01-07 6:32 ` [dpdk-dev] [PATCH v5 1/6] ixgbe: Code cleanup Ouyang Changchun
2015-01-07 6:32 ` [dpdk-dev] [PATCH v5 2/6] ixgbe: Negotiate VF API version Ouyang Changchun
2015-01-07 6:32 ` [dpdk-dev] [PATCH v5 3/6] ixgbe: Get VF queue number Ouyang Changchun
2015-01-08 9:01 ` Vlad Zolotarov
2015-01-07 6:32 ` [dpdk-dev] [PATCH v5 4/6] ether: Check VMDq RSS mode Ouyang Changchun
2015-01-08 9:19 ` Vlad Zolotarov
2015-01-08 18:48 ` Vlad Zolotarov
2015-01-09 5:54 ` Ouyang, Changchun
2015-01-09 13:49 ` Vlad Zolotarov
2015-01-12 3:41 ` Ouyang, Changchun
2015-01-12 13:58 ` Vlad Zolotarov
2015-01-13 1:50 ` Ouyang, Changchun
2015-01-13 9:00 ` Vlad Zolotarov
2015-01-14 0:44 ` Ouyang, Changchun
2015-01-07 6:32 ` [dpdk-dev] [PATCH v5 5/6] ixgbe: Config VF RSS Ouyang Changchun
2015-01-08 9:43 ` Vlad Zolotarov
2015-01-09 6:07 ` Ouyang, Changchun
2015-01-09 14:01 ` Vlad Zolotarov
2015-01-12 5:11 ` Ouyang, Changchun
2015-01-07 6:32 ` [dpdk-dev] [PATCH v5 6/6] testpmd: Set Rx VMDq RSS mode Ouyang Changchun
2015-01-08 9:46 ` Vlad Zolotarov
2015-01-08 9:56 ` [dpdk-dev] [PATCH v5 0/6] Enable VF RSS for Niantic Vlad Zolotarov
2015-01-18 21:58 ` Thomas Monjalon
2015-01-19 9:40 ` Vlad Zolotarov
2015-01-12 5:59 ` [dpdk-dev] [PATCH v6 " Ouyang Changchun
2015-01-12 5:59 ` [dpdk-dev] [PATCH v6 1/6] ixgbe: Code cleanup Ouyang Changchun
2015-01-12 5:59 ` [dpdk-dev] [PATCH v6 2/6] ixgbe: Negotiate VF API version Ouyang Changchun
2015-01-12 5:59 ` [dpdk-dev] [PATCH v6 3/6] ixgbe: Get VF queue number Ouyang Changchun
2015-01-19 9:13 ` Wodkowski, PawelX
2015-01-20 0:54 ` Ouyang, Changchun
2015-01-12 5:59 ` [dpdk-dev] [PATCH v6 4/6] ether: Check VMDq RSS mode Ouyang Changchun
2015-01-12 14:06 ` Vlad Zolotarov
2015-01-18 22:04 ` Thomas Monjalon
2015-01-19 10:31 ` Wodkowski, PawelX
2015-01-20 1:03 ` Ouyang, Changchun
2015-01-12 5:59 ` [dpdk-dev] [PATCH v6 5/6] ixgbe: Config VF RSS Ouyang Changchun
2015-01-12 14:04 ` Vlad Zolotarov
2015-01-20 9:35 ` Wodkowski, PawelX
2015-01-21 2:43 ` Ouyang, Changchun
2015-01-21 8:44 ` Wodkowski, PawelX
2015-01-22 12:59 ` Vlad Zolotarov
2015-01-22 13:19 ` Wodkowski, PawelX
2015-01-12 5:59 ` [dpdk-dev] [PATCH v6 6/6] testpmd: Set Rx VMDq RSS mode Ouyang Changchun
2015-01-12 14:05 ` Vlad Zolotarov
2015-01-18 22:24 ` [dpdk-dev] [PATCH v6 0/6] Enable VF RSS for Niantic Thomas Monjalon
2015-01-19 4:51 ` Ouyang, Changchun
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