From: "Fastabend, John R" <john.fastabend@gmail•com>
To: Jamal Hadi Salim <jhs@mojatatu•com>, "Amir Vadai\"" <amir@vadai•me>
Cc: ogerlitz@mellanox•com, jiri@resnulli•us,
jeffrey.t.kirsher@intel•com, netdev@vger•kernel.org,
davem@davemloft•net
Subject: Re: [net-next PATCH 7/7] net: ixgbe: add support for tc_u32 offload
Date: Tue, 9 Feb 2016 03:30:58 -0800 [thread overview]
Message-ID: <56B9CDF2.2050908@gmail.com> (raw)
In-Reply-To: <56B1F689.5040609@mojatatu.com>
[...]
>>
>> If you leave ht and order off the tc cli I believe 'tc' just
>> picks some semi-arbitrary ones for you. I've been in the habit
>> of always specifying them even for software filters.
>>
>
> The default table id is essentially 0x800. Default bucket is 0.
> "order" essentially is the filter id. And given you can link tables
> (Nice work John!); essentially the ht:bucket:nodeid is an "address" to
> a specific filter on a specific table and when makes sense a specific
> hash bucket. Some other way to look at it is as a way to construct
> a mapping to a TCAM key.
> What John is doing is essentially taking the nodeid and trying to use
> it as a priority. In otherwise the abstraction is reduced to a linked
> list in which the ordering is how the list is traversed.
> It may work in this case, but i am for being able to explicitly specify
> priorities.
Sorry bombing you with emails Jamal. Another thing to note is ixgbe
doesn't support hash tables explicitly but our other devices do. So
when a hash node is created we can map that onto a hardware block
and actually do the hash.
>
> cheers,
> jamal
>
next prev parent reply other threads:[~2016-02-09 11:31 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-03 9:27 [net-next PATCH 0/7] tc offload for cls_u32 on ixgbe John Fastabend
2016-02-03 9:27 ` [net-next PATCH 1/7] net: rework ndo tc op to consume additional qdisc handle parameter John Fastabend
2016-02-03 9:58 ` kbuild test robot
2016-02-03 9:59 ` kbuild test robot
2016-02-03 11:44 ` kbuild test robot
2016-02-03 9:28 ` [net-next PATCH 2/7] net: rework setup_tc ndo op to consume general tc operand John Fastabend
2016-02-03 9:28 ` [net-next PATCH 3/7] net: sched: add cls_u32 offload hooks for netdevs John Fastabend
2016-02-03 10:14 ` kbuild test robot
2016-02-04 13:18 ` Amir Vadai"
2016-02-09 11:09 ` Fastabend, John R
2016-02-03 9:28 ` [net-next PATCH 4/7] net: add tc offload feature flag John Fastabend
2016-02-03 9:29 ` [net-next PATCH 5/7] net: tc: helper functions to query action types John Fastabend
2016-02-03 9:29 ` [net-next PATCH 6/7] net: ixgbe: add minimal parser details for ixgbe John Fastabend
2016-02-03 9:29 ` [net-next PATCH 7/7] net: ixgbe: add support for tc_u32 offload John Fastabend
2016-02-03 10:07 ` Amir Vadai"
2016-02-03 10:26 ` John Fastabend
2016-02-03 12:46 ` Jamal Hadi Salim
2016-02-03 19:02 ` Fastabend, John R
2016-02-09 11:30 ` Fastabend, John R [this message]
2016-02-04 7:30 ` Amir Vadai"
2016-02-04 8:23 ` Fastabend, John R
2016-02-04 12:12 ` Amir Vadai"
2016-02-09 11:27 ` Fastabend, John R
2016-02-03 10:11 ` [net-next PATCH 0/7] tc offload for cls_u32 on ixgbe Amir Vadai"
2016-02-03 10:21 ` John Fastabend
2016-02-03 10:31 ` Or Gerlitz
2016-02-03 12:21 ` Jamal Hadi Salim
2016-02-03 18:48 ` Fastabend, John R
2016-02-04 13:12 ` Jamal Hadi Salim
2016-02-09 11:24 ` Fastabend, John R
2016-02-09 12:20 ` Jamal Hadi Salim
2016-02-04 9:16 ` Jiri Pirko
2016-02-04 23:19 ` Pablo Neira Ayuso
2016-02-09 11:06 ` Fastabend, John R
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