Re: [dpdk-dev] [PATCH] devtools: add more headline case rules

[Ferruh Yigit <ferruh.yigit@intel.com>]

On 3/5/2020 3:11 PM, Thomas Monjalon wrote:
> 05/03/2020 15:55, Ferruh Yigit:
>> FDIR   -> Flow Director
> 
> In general I prefer avoiding FDIR for two reasons:
> 1/ this is an Intel-only acronym

Yes, it is "Intel Ethernet Flow Director" but still it is a valid abbreviation
and we have it in our git logs.

> 2/ rte_flow API is superseding it

I think there is a confusion here, two things seems confused.

Flow director is a NIC feature for filtering different flows to different
queues. It is kind of advanced RSS [1].

You can use rte_flow to program FDIR, which is what we are doing for a while. So
this is *not* something conflicts with rte_flow.

Also there is 'filter_ctrl' API (rte_eth_dev_filter_ctrl) which is deprecated,
and which can be used to control HW filtering, including FDIR.

So 'rte_flow' doesn't supersede 'FDIR', it supersede 'filter_ctrl' API, and
'FDIR' feature can be used with rte_flow.



[1]
https://software.intel.com/en-us/articles/setting-up-intel-ethernet-flow-director
"
Intel® Ethernet Flow Director (Intel® Ethernet FD) directs Ethernet packets to
the core where the packet consuming process, application, container, or
microservice is running. It is a step beyond receive side scaling (RSS) in which
packets are sent to different cores for interrupt processing, and then
subsequently forwarded to cores on which the consuming process is running.

Intel Ethernet FD supports advanced filters that direct received packets to
different queues, and enables tight control on flow in the platform. It matches
flows and CPU cores where the processing application is running for flow
affinity, and supports multiple parameters for flexible flow classification and
load balancing. When operating in Application Targeting Routing (ATR) mode,
Intel Ethernet FD is essentially the hardware offloaded version of Receive Flow
Steering available on Linux* systems, and when running in this mode, Receive
Packet Steering and Receive Flow Steering are disabled.
"


> 
>> OOB    -> Out Of Bounds
> 
> I don't think it is a good idea to use this acronym. It is not a techno.
> I prefer out-of-bounds with all letters.

This is coming from the git history, it seems we have used it in past at least
once. Do you prefer to drop it?

> 
> The rest looks fine, thanks.
> 
>