From: fengchengwen <fengchengwen@huawei.com>
To: Dengdui Huang <huangdengdui@huawei.com>, <dev@dpdk.org>
Cc: <ferruh.yigit@amd.com>, <aman.deep.singh@intel.com>,
<yuying.zhang@intel.com>, <liuyonglong@huawei.com>
Subject: Re: [PATCH] app/testpmd: fix crash in multi-process packet forwarding
Date: Fri, 26 Jan 2024 14:23:16 +0800 [thread overview]
Message-ID: <edc1c416-5898-acd9-7ea9-4dfafddcb1f0@huawei.com> (raw)
In-Reply-To: <20240126024110.2671570-1-huangdengdui@huawei.com>
Hi Dengdui,
On 2024/1/26 10:41, Dengdui Huang wrote:
> On multi-process scenario, each process creates flows based on the
> number of queues. When nbcore is greater than 1, multiple cores may
> use the same queue to forward packet, like:
> dpdk-testpmd -a BDF --proc-type=auto -- -i --rxq=4 --txq=4
> --nb-cores=2 --num-procs=2 --proc-id=0
> testpmd> start
> mac packet forwarding - ports=1 - cores=2 - streams=4 - NUMA support
> enabled, MP allocation mode: native
> Logical Core 2 (socket 0) forwards packets on 2 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
> Logical Core 3 (socket 0) forwards packets on 2 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
tip: it would be more readable if with an indent, just like below example.
Acked-by: Chengwen Feng <fengchengwen@huawei.com>
Thanks
>
> After this commit, the result will be:
> dpdk-testpmd -a BDF --proc-type=auto -- -i --rxq=4 --txq=4
> --nb-cores=2 --num-procs=2 --proc-id=0
> testpmd> start
> io packet forwarding - ports=1 - cores=2 - streams=2 - NUMA support
> enabled, MP allocation mode: native
> Logical Core 2 (socket 0) forwards packets on 1 streams:
> RX P=0/Q=0 (socket 2) -> TX P=0/Q=0 (socket 2) peer=02:00:00:00:00:00
> Logical Core 3 (socket 0) forwards packets on 1 streams:
> RX P=0/Q=1 (socket 2) -> TX P=0/Q=1 (socket 2) peer=02:00:00:00:00:00
>
> Fixes: a550baf24af9 ("app/testpmd: support multi-process")
> Cc: stable@dpdk.org
>
> Signed-off-by: Dengdui Huang <huangdengdui@huawei.com>
> ---
> app/test-pmd/config.c | 6 +-----
> 1 file changed, 1 insertion(+), 5 deletions(-)
>
> diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c
> index cad7537bc6..2c4dedd603 100644
> --- a/app/test-pmd/config.c
> +++ b/app/test-pmd/config.c
> @@ -4794,7 +4794,6 @@ rss_fwd_config_setup(void)
> queueid_t nb_q;
> streamid_t sm_id;
> int start;
> - int end;
>
> nb_q = nb_rxq;
> if (nb_q > nb_txq)
> @@ -4802,7 +4801,7 @@ rss_fwd_config_setup(void)
> 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_q * cur_fwd_config.nb_fwd_ports);
> + (streamid_t) (nb_q / num_procs * cur_fwd_config.nb_fwd_ports);
>
> if (cur_fwd_config.nb_fwd_streams < cur_fwd_config.nb_fwd_lcores)
> cur_fwd_config.nb_fwd_lcores =
> @@ -4824,7 +4823,6 @@ rss_fwd_config_setup(void)
> * the 2~3 queue for secondary process.
> */
> start = proc_id * nb_q / num_procs;
> - end = start + nb_q / num_procs;
> rxp = 0;
> rxq = start;
> for (sm_id = 0; sm_id < cur_fwd_config.nb_fwd_streams; sm_id++) {
> @@ -4843,8 +4841,6 @@ rss_fwd_config_setup(void)
> continue;
> rxp = 0;
> rxq++;
> - if (rxq >= end)
> - rxq = start;
> }
> }
>
>
next prev parent reply other threads:[~2024-01-26 6:23 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-26 2:41 Dengdui Huang
2024-01-26 6:23 ` fengchengwen [this message]
2024-01-30 1:32 ` huangdengdui
2024-01-30 1:32 ` [PATCH v2] " Dengdui Huang
2024-02-08 1:12 ` Ferruh Yigit
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