From: Ferruh Yigit <ferruh.yigit@intel.com>
To: oulijun <oulijun@huawei.com>, "Li, Xiaoyun" <xiaoyun.li@intel.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>,
"linuxarm@openeuler.org" <linuxarm@openeuler.org>
Subject: Re: [dpdk-dev] [PATCH 1/3] app/testpmd: fix forwarding configuration when DCB test
Date: Sat, 10 Apr 2021 02:12:23 +0100 [thread overview]
Message-ID: <7538897f-9251-3c82-adbd-d3d995ed3c95@intel.com> (raw)
In-Reply-To: <b31e6b82-ca33-7b66-d98a-86f927a45eb9@huawei.com>
On 3/23/2021 2:17 PM, oulijun wrote:
>
>
> 在 2021/3/23 16:55, Li, Xiaoyun 写道:
>> Hi
>>
>>> -----Original Message-----
>>> From: Lijun Ou <oulijun@huawei.com>
>>> Sent: Friday, March 5, 2021 18:22
>>> To: Yigit, Ferruh <ferruh.yigit@intel.com>
>>> Cc: Li, Xiaoyun <xiaoyun.li@intel.com>; dev@dpdk.org;
>>> linuxarm@openeuler.org
>>> Subject: [PATCH 1/3] app/testpmd: fix forwarding configuration when DCB test
>>>
>>> From: Huisong Li <lihuisong@huawei.com>
>>>
>> The commit message is too long and redundant. Please simplify it.
>>
>>> Currently, 'nb_fwd_lcores' value are both adjusted based on 'nb_fwd_streams' in
>>> rss/simple/icmp_echo_fwd_config_setup. But the operation is lack for
>>> dcb_fwd_config_setup, which may lead to a bad events where multiple polling
>>> threads operate on the same queue. As a result, various possible exceptions will
>>> occur. The procedure is as follows:
>>>
>>> startup testpmd app as follows:
>>> testpmd> port stop all
>>> testpmd> set nbcore 8
>>> testpmd> port config 0 dcb vt off 4 pfc on port config all rxq 16 port
>>> testpmd> config all txq 16 port start all set fwd mac
>>> Logical Core 1 (socket 0) forwards packets on 4 streams:
>>> RX P=0/Q=0 (socket 0) -> TX P=0/Q=0 (socket 0) peer=02:00:00:00:00:00 RX
>>> P=0/Q=1 (socket 0) -> TX P=0/Q=1 (socket 0) peer=02:00:00:00:00:00 RX
>>> P=0/Q=2 (socket 0) -> TX P=0/Q=2 (socket 0) peer=02:00:00:00:00:00 RX
>>> P=0/Q=3 (socket 0) -> TX P=0/Q=3 (socket 0) peer=02:00:00:00:00:00 Logical
>>> Core 2 (socket 0) forwards packets on 4 streams:
>>> RX P=0/Q=4 (socket 0) -> TX P=0/Q=4 (socket 0) peer=02:00:00:00:00:00 RX
>>> P=0/Q=5 (socket 0) -> TX P=0/Q=5 (socket 0) peer=02:00:00:00:00:00 RX
>>> P=0/Q=6 (socket 0) -> TX P=0/Q=6 (socket 0) peer=02:00:00:00:00:00 RX
>>> P=0/Q=7 (socket 0) -> TX P=0/Q=7 (socket 0) peer=02:00:00:00:00:00 Logical
>>> Core 3 (socket 0) forwards packets on 4 streams:
>>> RX P=0/Q=8 (socket 0) -> TX P=0/Q=8 (socket 0) peer=02:00:00:00:00:00 RX
>>> P=0/Q=9 (socket 0) -> TX P=0/Q=9 (socket 0) peer=02:00:00:00:00:00 RX
>>> P=0/Q=10 (socket 0) -> TX P=0/Q=10 (socket 0) peer=02:00:00:00:00:00 RX
>>> P=0/Q=11 (socket 0) -> TX P=0/Q=11 (socket 0) peer=02:00:00:00:00:00 Logical
>>> Core 4 (socket 0) forwards packets on 4 streams:
>>> RX P=0/Q=12 (socket 0) -> TX P=0/Q=12 (socket 0) peer=02:00:00:00:00:00 RX
>>> P=0/Q=13 (socket 0) -> TX P=0/Q=13 (socket 0) peer=02:00:00:00:00:00 RX
>>> P=0/Q=14 (socket 0) -> TX P=0/Q=14 (socket 0) peer=02:00:00:00:00:00 RX
>>> P=0/Q=15 (socket 0) -> TX P=0/Q=15 (socket 0) peer=02:00:00:00:00:00 Logical
>>> Core 5 (socket 0) forwards packets on 1 streams:
>>> RX P=0/Q=4 (socket 0) -> TX P=0/Q=4 (socket 0) peer=02:00:00:00:00:00 Logical
>>> Core 6 (socket 0) forwards packets on 1 streams:
>>> RX P=0/Q=5 (socket 0) -> TX P=0/Q=5 (socket 0) peer=02:00:00:00:00:00 Logical
>>> Core 7 (socket 0) forwards packets on 1 streams:
>>> RX P=0/Q=6 (socket 0) -> TX P=0/Q=6 (socket 0) peer=02:00:00:00:00:00 Logical
>>> Core 8 (socket 0) forwards packets on 1 streams:
>>> RX P=0/Q=7 (socket 0) -> TX P=0/Q=7 (socket 0) peer=02:00:00:00:00:00
>>>
>>> Notice: number of rxq and txq in running cmdline are greater than used nb_tc.
>>>
>>> For the DCB forwarding test, each core is assigned on each traffic class and
>>> each
>>> core is assigned a multi-stream. Therefore, 'nb_fwd_lcores'
>>> value can be adjusted based on 'total_tc_num' in all forwarding ports.
>>>
>>> In addition, after operation of port stop/port start, forwarding
>>> configuration is
>>> changed by rss_fwd_config_setup. In "start_port"
>>> function, dcb_test is set to 1 based on dcb_config. So it also should be cleared
>>> when dcb_config is 0.
>>>
>>> Fixes: 900550de04a7 ("app/testpmd: add dcb support")
>>> Fixes: ce8d561418d4 ("app/testpmd: add port configuration settings")
>>> Cc: stable@dpdk.org
>>>
>>> Signed-off-by: Huisong Li <lihuisong@huawei.com>
>>> Signed-off-by: Lijun Ou <oulijun@huawei.com>
>>> ---
>>> app/test-pmd/config.c | 19 +++++++++++++++++++ app/test-pmd/testpmd.c |
>>> 12 +++++++-----
>>> 2 files changed, 26 insertions(+), 5 deletions(-)
>>>
>>> diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c index
>>> 576d5ac..c89f8cd 100644
>>> --- a/app/test-pmd/config.c
>>> +++ b/app/test-pmd/config.c
>>> @@ -2864,6 +2864,21 @@ rss_fwd_config_setup(void)
>>> }
>>> }
>>>
>>> +static uint16_t
>>> +get_fwd_port_total_tc_num(void)
>>> +{
>>> + struct rte_eth_dcb_info dcb_info;
>>> + uint16_t total_tc_num = 0;
>>> + unsigned int i;
>>> +
>>> + for (i = 0; i < nb_fwd_ports; i++) {
>>> + (void)rte_eth_dev_get_dcb_info(fwd_ports_ids[i], &dcb_info);
>>> + total_tc_num += dcb_info.nb_tcs;
>>> + }
>>> +
>>> + return total_tc_num;
>>> +}
>>
>> It's only 3 lines. Is it really necessary to make it into a function which is
>> not called by anyone else? A comment and the loop are enough.
>>
> To calculate the total number of TCs on all forwarding ports, we have to call
> rte_eth_dev_get_dcb_info(). However, rte_eth_dev_get_dcb_info()
> has been called twice by dcb_fwd_config_setup() to setup dcb forwarding
> configuration. The dcb_fwd_config_setup() might be more readable
> if encapsulated, I think. In addition, variables in "cur_fwd_config" are
> initialized more centrally. What do you think?
+1 to have the function, agree it makes more readable.
But for the PMDs that doesn't support '.get_dcb_info' it will return 0, causing
'nb_fwd_lcores' to be zero, I think this should be prevented.
Either can add a zero check here, or do the check during "port config # dcb ..."
and prevent setting 'dcb_config' at first place for those pmds. I think second
option is better, what do you think.
Overall DCB support in the testpmd seems missing some corner cases and requires
more update/fix.
>>> +
>>> /**
>>> * For the DCB forwarding test, each core is assigned on each traffic class.
>>> *
>>> @@ -2883,12 +2898,16 @@ dcb_fwd_config_setup(void)
>>> lcoreid_t lc_id;
>>> uint16_t nb_rx_queue, nb_tx_queue;
>>> uint16_t i, j, k, sm_id = 0;
>>> + uint16_t total_tc_num = 0;
>>> uint8_t tc = 0;
>>>
>>> cur_fwd_config.nb_fwd_lcores = (lcoreid_t) nb_fwd_lcores;
>>> cur_fwd_config.nb_fwd_ports = nb_fwd_ports;
>>> cur_fwd_config.nb_fwd_streams =
>>> (streamid_t) (nb_rxq * cur_fwd_config.nb_fwd_ports);
>>> + total_tc_num = get_fwd_port_total_tc_num();
>>> + if (cur_fwd_config.nb_fwd_lcores > total_tc_num)
>>> + cur_fwd_config.nb_fwd_lcores = total_tc_num;
>>>
>>> /* reinitialize forwarding streams */
>>> init_fwd_streams();
>>> diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c index
>>> 1a57324..7eb810b 100644
>>> --- a/app/test-pmd/testpmd.c
>>> +++ b/app/test-pmd/testpmd.c
>>> @@ -2707,14 +2707,16 @@ stop_port(portid_t pid)
>>> portid_t peer_pl[RTE_MAX_ETHPORTS];
>>> int peer_pi;
>>>
>>> - if (dcb_test) {
>>> - dcb_test = 0;
>>> - dcb_config = 0;
>>> - }
>>> -
>>> if (port_id_is_invalid(pid, ENABLED_WARN))
>>> return;
>>>
>>> + /*
>>> + * In "start_port" function, dcb_test is set to 1 based on dcb_config.
>>> + * So it should be cleared when dcb_config is 0.
>>> + */
>>> + if (dcb_config == 0)
>>> + dcb_test = 0;
>>> +
>>
>> I don't understand why are you changing this.
>> dcb_test will only be set when dcb_config is 1 when starting ports. And both
>> dcb_test and dcb_config will be cleared when stopping ports.
>> So dcb will only affect when you set port dcb and then start port and when
>> stop port dcb will be cleared.
>>
>> So what's the problem of original codes?
>>
>> Your change will cause issues that there's no place to set dcb_config as 0. If
>> you config dcb, then it'll be always dcb mode unless restart the whole testpmd.
>>
>>> printf("Stopping ports...\n");
>>>
>>> RTE_ETH_FOREACH_DEV(pi) {
>>> --
>>> 2.7.4
>>
>> .
>>
next prev parent reply other threads:[~2021-04-10 1:12 UTC|newest]
Thread overview: 82+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-05 10:22 [dpdk-dev] [PATCH 0/3] Fixes for testpmd Lijun Ou
2021-03-05 10:22 ` [dpdk-dev] [PATCH 1/3] app/testpmd: fix forwarding configuration when DCB test Lijun Ou
2021-03-23 8:55 ` Li, Xiaoyun
2021-03-23 14:17 ` oulijun
2021-03-23 14:17 ` oulijun
2021-03-24 1:51 ` Li, Xiaoyun
2021-04-10 1:12 ` Ferruh Yigit [this message]
2021-04-10 2:53 ` oulijun
2021-03-23 14:18 ` oulijun
2021-03-24 2:03 ` Li, Xiaoyun
2021-03-24 13:40 ` [dpdk-dev] [Linuxarm] " oulijun
2021-03-25 2:21 ` Li, Xiaoyun
2021-03-27 3:53 ` oulijun
2021-04-10 0:56 ` Ferruh Yigit
2021-04-10 2:58 ` oulijun
2021-04-12 7:52 ` Ferruh Yigit
2021-04-12 12:20 ` oulijun
2021-03-05 10:22 ` [dpdk-dev] [PATCH 2/3] app/testpmd: remove forwarding config from parsing Rx and Tx Lijun Ou
2021-03-23 7:50 ` Li, Xiaoyun
2021-03-24 1:00 ` oulijun
2021-03-24 1:44 ` Li, Xiaoyun
2021-03-25 3:03 ` oulijun
2021-03-29 1:53 ` Li, Xiaoyun
2021-04-02 1:44 ` oulijun
2021-04-02 2:33 ` Li, Xiaoyun
2021-04-09 6:09 ` [dpdk-dev] [Linuxarm] " oulijun
2021-04-09 7:08 ` Li, Xiaoyun
2021-04-10 3:02 ` oulijun
2021-04-12 10:35 ` [dpdk-dev] " Ferruh Yigit
2021-04-12 12:20 ` oulijun
2021-03-05 10:22 ` [dpdk-dev] [PATCH 3/3] app/testpmd: use of Rx/Tx in testpmd Lijun Ou
2021-03-23 3:12 ` Li, Xiaoyun
2021-03-23 3:17 ` Li, Xiaoyun
2021-03-23 7:25 ` Andrew Rybchenko
2021-03-23 7:46 ` Tu, Lijuan
2021-03-23 7:51 ` oulijun
2021-03-23 7:58 ` Li, Xiaoyun
2021-03-23 10:42 ` Ferruh Yigit
2021-03-23 7:59 ` Tu, Lijuan
2021-03-20 1:19 ` [dpdk-dev] [PATCH 0/3] Fixes for testpmd Min Hu (Connor)
2021-04-20 7:31 ` [dpdk-dev] [PATCH V2 0/7] modifications about DCB forwarding configuration Huisong Li
2021-04-20 7:32 ` [dpdk-dev] [PATCH V2 1/7] app/testpmd: fix forward lcores number when DCB test Huisong Li
2021-04-27 9:20 ` Li, Xiaoyun
2021-04-27 13:49 ` Huisong Li
2021-04-28 2:13 ` Li, Xiaoyun
2021-04-20 7:32 ` [dpdk-dev] [PATCH V2 2/7] app/testpmd: fix DCB forwarding configuration Huisong Li
2021-04-20 7:32 ` [dpdk-dev] [PATCH V2 3/7] app/testpmd: fix a segment fault when DCB test Huisong Li
2021-04-20 7:32 ` [dpdk-dev] [PATCH V2 4/7] app/testpmd: add check for support of reporting DCB info Huisong Li
2021-04-20 7:32 ` [dpdk-dev] [PATCH V2 5/7] app/testpmd: move position of verifying DCB test Huisong Li
2021-04-20 7:32 ` [dpdk-dev] [PATCH V2 6/7] app/testpmd: add forwarding config in start port Huisong Li
2021-04-20 7:32 ` [dpdk-dev] [PATCH V2 7/7] app/testpmd: remove redundant fwd streams initialization Huisong Li
2021-04-20 7:35 ` [dpdk-dev] [PATCH 0/3] Fixes for testpmd Huisong Li
2021-04-20 9:00 ` [dpdk-dev] [PATCH V3 0/7] modifications about DCB forwarding configuration Huisong Li
2021-04-20 9:01 ` [dpdk-dev] [PATCH V3 1/7] app/testpmd: fix forward lcores number when DCB test Huisong Li
2021-04-27 10:18 ` Li, Xiaoyun
2021-04-20 9:01 ` [dpdk-dev] [PATCH V3 2/7] app/testpmd: fix DCB forwarding configuration Huisong Li
2021-04-27 10:59 ` Li, Xiaoyun
2021-04-27 14:13 ` Huisong Li
2021-04-20 9:01 ` [dpdk-dev] [PATCH V3 3/7] app/testpmd: fix a segment fault when DCB test Huisong Li
2021-04-27 11:19 ` Li, Xiaoyun
2021-04-27 14:10 ` Huisong Li
2021-04-28 2:02 ` Li, Xiaoyun
2021-04-28 2:26 ` Huisong Li
2021-04-20 9:01 ` [dpdk-dev] [PATCH V3 4/7] app/testpmd: add check for support of reporting DCB info Huisong Li
2021-04-27 11:26 ` Li, Xiaoyun
2021-04-20 9:01 ` [dpdk-dev] [PATCH V3 5/7] app/testpmd: move position of verifying DCB test Huisong Li
2021-04-27 11:33 ` Li, Xiaoyun
2021-04-20 9:01 ` [dpdk-dev] [PATCH V3 6/7] app/testpmd: add forwarding config in start port Huisong Li
2021-04-27 11:43 ` Li, Xiaoyun
2021-04-28 2:14 ` Huisong Li
2021-04-20 9:01 ` [dpdk-dev] [PATCH V3 7/7] app/testpmd: remove redundant fwd streams initialization Huisong Li
2021-04-27 11:50 ` Li, Xiaoyun
2021-04-28 6:40 ` [dpdk-dev] [PATCH V4 0/7] modifications about DCB forwarding configuration Huisong Li
2021-04-28 6:40 ` [dpdk-dev] [PATCH V4 1/7] app/testpmd: fix forward lcores number when DCB test Huisong Li
2021-04-28 6:40 ` [dpdk-dev] [PATCH V4 2/7] app/testpmd: fix DCB forwarding configuration Huisong Li
2021-04-28 6:40 ` [dpdk-dev] [PATCH V4 3/7] app/testpmd: fix a segment fault when DCB test Huisong Li
2021-04-28 6:40 ` [dpdk-dev] [PATCH V4 4/7] app/testpmd: add check for support of reporting DCB info Huisong Li
2021-04-28 6:40 ` [dpdk-dev] [PATCH V4 5/7] app/testpmd: move position of verifying DCB test Huisong Li
2021-04-28 6:40 ` [dpdk-dev] [PATCH V4 6/7] app/testpmd: add forwarding configuration when config DCB Huisong Li
2021-04-28 6:40 ` [dpdk-dev] [PATCH V4 7/7] app/testpmd: remove redundant fwd streams initialization Huisong Li
2021-04-28 7:01 ` [dpdk-dev] [PATCH V4 0/7] modifications about DCB forwarding configuration Li, Xiaoyun
2021-04-29 16:13 ` Ferruh Yigit
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