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From: Ido Goshen <Ido@cgstowernetworks.com>
To: "users@dpdk.org" <users@dpdk.org>
Cc: "konstantin.ananyev@intel.com" <konstantin.ananyev@intel.com>
Subject: Does ACL support field size of 8 bytes?
Date: Wed, 13 Apr 2022 13:55:39 +0000
Message-ID: <AS4PR09MB5525D74A4559B241F03BB981D6EC9@AS4PR09MB5525.eurprd09.prod.outlook.com> (raw)


I've lots of good experience with ACL but can't make it work with u64 values 
I know it can be split to 2xu32 fields, but it makes it more complex to use and a wastes double  number of fields (we hit the RTE_ACL_MAX_FIELDS 64 limit)

According to the documentation and rte_acl.h fields size can be 8 bytes (u64)
  'The size parameter defines the length of the field in bytes. Allowable values are 1, 2, 4, or 8 bytes.'  
  (from https://doc.dpdk.org/guides-21.11/prog_guide/packet_classif_access_ctrl.html#rule-definition)

Though there's a hint it's less recommended 
  'Also, it is best to define fields of 8 or more bytes as 4 byte fields so that the build processes can eliminate fields that are all wild.'

It's also not clear how it fits in a group (i.e. what's input_index stride) which is only 4 bytes
    'All subsequent fields has to be grouped into sets of 4 consecutive bytes.'

I couldn't find any example or test app that's using 8 bytes
e.g. for IPv6 address 4xu32 fields are always used and not 2xu64

Should it work? 
Did anyone try it successfully and/or can share an example?

- Ido

             reply	other threads:[~2022-04-13 13:55 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-13 13:55 Ido Goshen [this message]
2022-04-26 17:56 ` Ananyev, Konstantin
2022-04-26 17:58   ` Fwd: " Konstantin Ananyev
2022-05-11 14:28   ` Ido Goshen
2022-05-15 20:53     ` Konstantin Ananyev
2022-05-16  6:28       ` Ido Goshen
2022-05-17 23:43         ` Konstantin Ananyev

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