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From: "He, ShiyangX" <shiyangx.he@intel.com>
To: "Zhang, Yuying" <yuying.zhang@intel.com>
CC: "dev@dpdk.org" <dev@dpdk.org>, "Zhou, YidingX" <yidingx.zhou@intel.com>,
"stable@dpdk.org" <stable@dpdk.org>, "Singh, Aman Deep"
<aman.deep.singh@intel.com>, "Burakov, Anatoly" <anatoly.burakov@intel.com>,
"Li, Xiaoyun" <xiaoyun.li@intel.com>, Alvin Zhang <alvinx.zhang@intel.com>
Subject: RE: [PATCH] app/testpmd: fix secondary process not forwarding
Thread-Topic: [PATCH] app/testpmd: fix secondary process not forwarding
Thread-Index: AQHZHCWTalLPgfv2HUKGzEeM/yyAlK6GrpSAgAWkPjCAD7wToIAoke6AgAAyBFA=
Date: Wed, 8 Feb 2023 06:38:37 +0000
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Errors-To: dev-bounces@dpdk.org
>-----Original Message-----
>From: Zhang, Yuying <yuying.zhang@intel.com>
>Sent: Wednesday, February 8, 2023 11:22 AM
>To: He, ShiyangX <shiyangx.he@intel.com>
>Cc: dev@dpdk.org; Zhou, YidingX <yidingx.zhou@intel.com>;
>stable@dpdk.org; Singh, Aman Deep <aman.deep.singh@intel.com>; Burakov,
>Anatoly <anatoly.burakov@intel.com>; Li, Xiaoyun <xiaoyun.li@intel.com>;
>Alvin Zhang <alvinx.zhang@intel.com>
>Subject: RE: [PATCH] app/testpmd: fix secondary process not forwarding
>
>Hi Shiyang,
>
>> -----Original Message-----
>> From: He, ShiyangX <shiyangx.he@intel.com>
>> Sent: 2023=1B$BG/=1B(B1=1B$B7n=1B(B13=1B$BF|=1B(B 17:08
>> To: He, ShiyangX <shiyangx.he@intel.com>; Zhang, Yuying
>> <yuying.zhang@intel.com>
>> Cc: dev@dpdk.org; Zhou, YidingX <yidingx.zhou@intel.com>;
>> stable@dpdk.org; Singh, Aman Deep <aman.deep.singh@intel.com>;
>> Burakov, Anatoly <anatoly.burakov@intel.com>; Li, Xiaoyun
>> <xiaoyun.li@intel.com>; Alvin Zhang <alvinx.zhang@intel.com>
>> Subject: RE: [PATCH] app/testpmd: fix secondary process not forwarding
>>
>> @Zhang, Yuying Hi, please take a look at this patch! Are there any comme=
nts?
>>
>> >-----Original Message-----
>> >From: He, ShiyangX <shiyangx.he@intel.com>
>> >Sent: Wednesday, January 4, 2023 10:02 AM
>> >To: Stephen Hemminger <stephen@networkplumber.org>
>> >Cc: dev@dpdk.org; Zhou, YidingX <yidingx.zhou@intel.com>;
>> >stable@dpdk.org; Singh, Aman Deep <aman.deep.singh@intel.com>;
>Zhang,
>> >Yuying <yuying.zhang@intel.com>; Burakov, Anatoly
>> ><anatoly.burakov@intel.com>; Li, Xiaoyun <xiaoyun.li@intel.com>;
>> >Alvin Zhang <alvinx.zhang@intel.com>
>> >Subject: RE: [PATCH] app/testpmd: fix secondary process not
>> >forwarding
>> >
>> >>> Under multi-process scenario, the secondary process gets queue
>> >>> state from the wrong location (the global variable 'ports').
>> >>> Therefore, the secondary process can not forward since "stream_init"=
is
>not called.
>> >>>
>> >>> This commit fixes the issue by calling 'rte_eth_rx/tx_queue_info_get=
'
>> >>> to get queue state from shared memory.
>> >>>
>> >>> Fixes: a78040c990cb ("app/testpmd: update forward engine
>> >>> beginning")
>> >>> Cc: stable@dpdk.org
>> >>>
>> >>> Signed-off-by: Shiyang He <shiyangx.he@intel.com>
>> >>
>> >>Would it be possible to fix this the initialization of ports
>> >>variable, rather than doing a per-state fixup here?
>> >
>> >In multi-process scenario, the secondary process does not initialize
>> >the queue state in the 'ports' variable, and the ethdev's queue state
>> >may be changed by any other process, which causes 'ports' queue state
>> >of per-process and ethdev's queue state are inconsistent. Therefore,
>> >getting the queue state from ethdev is a feasible way which I can think=
of.
>
>You should fix the queue state in the 'ports' variable of secondary proces=
s in
>the initialization of ports variable instead of fixup here.
If the ethdev's queue state is changed by other processes, the queue state =
in the 'ports' variable is inconsistent with ethdev's queue state. Therefor=
e, should obtain it from ethdev when accessing the queue state in the 'port=
s' variable.