netdev - Re: [patch net-next RFC v2 00/11] Add support for resource abstraction

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Message-ID: <64ee5d72-cf0e-f807-a8b0-e62333ee9d52@cumulusnetworks.com>
Date:   Sat, 18 Nov 2017 12:56:17 -0700
From:   David Ahern <dsa@...ulusnetworks.com>
To:     Jiri Pirko <jiri@...nulli.us>, netdev@...r.kernel.org
Cc:     davem@...emloft.net, mlxsw@...lanox.com, andrew@...n.ch,
        vivien.didelot@...oirfairelinux.com, f.fainelli@...il.com,
        michael.chan@...adcom.com, ganeshgr@...lsio.com,
        saeedm@...lanox.com, matanb@...lanox.com, leonro@...lanox.com,
        idosch@...lanox.com, jakub.kicinski@...ronome.com, ast@...nel.org,
        daniel@...earbox.net, simon.horman@...ronome.com,
        pieter.jansenvanvuuren@...ronome.com, john.hurley@...ronome.com,
        alexander.h.duyck@...el.com, linville@...driver.com,
        gospo@...adcom.com, steven.lin1@...adcom.com, yuvalm@...lanox.com,
        ogerlitz@...lanox.com, roopa@...ulusnetworks.com
Subject: Re: [patch net-next RFC v2 00/11] Add support for resource
 abstraction

On 11/14/17 9:18 AM, Jiri Pirko wrote:
> From: Jiri Pirko <jiri@...lanox.com>
> 
> Arkadi says:
> 
> Many of the ASIC's internal resources are limited and are shared between
> several hardware procedures. For example, unified hash-based memory can
> be used for many lookup purposes, like FDB and LPM. In many cases the user
> can provide a partitioning scheme for such a resource in order to perform
> fine tuning for his application. In many cases after setting the
> partitioning of the resource driver reload is needed. This patchset add
> support for hot reset of the driver.
> 
> Such an abstraction can be coupled with devlink's dpipe interface, which
> models the ASIC's pipeline as an graph of match/action tables. By modeling
> the hardware resource object, and by coupling it to several dpipe tables,
> further visibility can be achieved in order to debug ASIC-wide issues.
> 
> The proposed interface will provide the user the ability to understand the
> limitations of the hardware, and receive notification regarding its occupancy.
> Furthermore, monitoring the resource occupancy can be done in real-time and
> can be useful in many cases.
> 
> Userspace part prototype can be found at https://github.com/arkadis/iproute2/
> at resource_dev branch.
> 

Please add the example user commands from the above to this
cover-letter. Makes easier to understand the intentions of this patch
set from a user perspective.