T4240RDB FMC applied system, other interfaces' packets timed out

[omer_er]

Hello,

I have tried an application on T4240rdb. I applied fmc for steering forwarding packets to just one core. After I applied fmc, packets going through on same core as I expected; but there is a problem there. If I try to ping from/to other ethernet interfaces packets are timed out, I think they are dropped by fman. When I checked the cpu stats from "top" application, just one core %0 idle, other 23 cores almost free like %99 idle. How can it be possible ?

Any help will be appreciated.

Thanks.

[yipingwang]

Hello ömer faruk er ,

In order to forward all packets to just one core, you need to modify fmc policy to specify the the queue number binging to the dedicated channel which is allocated to a specified core.

You could refer to the following method to get the relationship between queue and dedicate channel, then refer to DPAA user manual to find the relationship between queue number and the specific core.

oot@localhost:~# cat /sys/devices/platform/soc/soc\:fsl\,dpaa/soc\:fsl\,dpaa\:ethernet\@1/net/fm1-mac2/fqids

Rx error: 391

Rx default: 392

Rx PCD: 14464 - 14591

Tx confirmation (mq): 393 - 456

Tx error: 457

Tx default confirmation: 458

Tx: 459 - 511

Tx: 32768 - 32778

root@localhost:~#

root@localhost:~#

root@localhost:~# echo 14464 > /sys/kernel/debug/qman/query_fq_fields

root@localhost:~# cat /sys/kernel/debug/qman/query_fq_fields

Query FQ Programmable Fields Result fqid 0x3880

orprws: 0

oa: 0

olws: 0

cgid: 3

fq_ctrl:

  Prefer in cache

  Avoid Blocking

  Context-A stashing

  Congestion Group Enable

dest_channel: 9

dest_wq: 5

ics_cred: 0

td_mant: 0

td_exp: 0

ctx_b: 0x10a

ctx_a: 0x0

ctx_a_stash_exclusive:

  FQ Ctx Stash

  Frame Annotation Stash

ctx_a_stash_annotation_cl: 1

ctx_a_stash_data_cl: 2

ctx_a_stash_context_cl: 2

root@localhost:~#

If your problem remains, please provide your fmc file.

Thanks,

Yiping