netdev - Re: [PATCH rdma-next v5 00/17] Statistics counter support

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Message-ID: <20190705155016.GA25864@ziepe.ca>
Date:   Fri, 5 Jul 2019 12:50:16 -0300
From:   Jason Gunthorpe <jgg@...pe.ca>
To:     Leon Romanovsky <leon@...nel.org>
Cc:     Doug Ledford <dledford@...hat.com>,
        Leon Romanovsky <leonro@...lanox.com>,
        RDMA mailing list <linux-rdma@...r.kernel.org>,
        Majd Dibbiny <majd@...lanox.com>,
        Mark Zhang <markz@...lanox.com>,
        Saeed Mahameed <saeedm@...lanox.com>,
        linux-netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH rdma-next v5 00/17] Statistics counter support

On Tue, Jul 02, 2019 at 01:02:29PM +0300, Leon Romanovsky wrote:
> From: Leon Romanovsky <leonro@...lanox.com>
> 
> Changelog:
>  v4 -> v5:
>  * Patch #6 and #14 - consolidated many counter release functions,
>    removed mutex lock protection from dealloc_counter() call
>    and simplified kref_put/kref_get operations.
>  * Added Saeed's ACK tags.
>  v3 -> v4:
>  * Add counter_dealloc() callback function
>  * Moved to kref implementation
>  * Fixed lock during spinlock
>  v2 -> v3:
>  * We didn't change use of atomics over kref for management of unbind
>    counter from QP. The reason to it that bind and unbind are non-symmetric
>    in regards of put and get, so we need to count differently memory
>    release flows of HW objects (restrack) and SW bind operations.
>  * Everything else was addressed.
>  v1 -> v2:
>  * Rebased to latest rdma-next
>  v0 -> v1:
>  * Changed wording of counter comment
>  * Removed unneeded assignments
>  * Added extra patch to present global counters
> 
> 
> Hi,
> 
> This series from Mark provides dynamic statistics infrastructure.
> He uses netlink interface to configure and retrieve those counters.
> 
> This infrastructure allows to users monitor various objects by binding
> to them counters. As the beginning, we used QP object as target for
> those counters, but future patches will include ODP MR information too.
> 
> Two binding modes are supported:
>  - Auto: This allows a user to build automatic set of objects to a counter
>    according to common criteria. For example in a per-type scheme, where in
>    one process all QPs with same QP type are bound automatically to a single
>    counter.
>  - Manual: This allows a user to manually bind objects on a counter.
> 
> Those two modes are mutual-exclusive with separation between processes,
> objects created by different processes cannot be bound to a same counter.
> 
> For objects which don't support counter binding, we will return
> pre-allocated counters.
> 
> $ rdma statistic qp set link mlx5_2/1 auto type on
> $ rdma statistic qp set link mlx5_2/1 auto off
> $ rdma statistic qp bind link mlx5_2/1 lqpn 178
> $ rdma statistic qp unbind link mlx5_2/1 cntn 4 lqpn 178
> $ rdma statistic show
> $ rdma statistic qp mode
> 
> Thanks
> 
> 
> Mark Zhang (17):
>   net/mlx5: Add rts2rts_qp_counters_set_id field in hca cap
>   RDMA/restrack: Introduce statistic counter
>   RDMA/restrack: Add an API to attach a task to a resource
>   RDMA/restrack: Make is_visible_in_pid_ns() as an API
>   RDMA/counter: Add set/clear per-port auto mode support
>   RDMA/counter: Add "auto" configuration mode support
>   IB/mlx5: Support set qp counter
>   IB/mlx5: Add counter set id as a parameter for
>     mlx5_ib_query_q_counters()
>   IB/mlx5: Support statistic q counter configuration
>   RDMA/nldev: Allow counter auto mode configration through RDMA netlink
>   RDMA/netlink: Implement counter dumpit calback
>   IB/mlx5: Add counter_alloc_stats() and counter_update_stats() support
>   RDMA/core: Get sum value of all counters when perform a sysfs stat
>     read
>   RDMA/counter: Allow manual mode configuration support
>   RDMA/nldev: Allow counter manual mode configration through RDMA
>     netlink
>   RDMA/nldev: Allow get counter mode through RDMA netlink
>   RDMA/nldev: Allow get default counter statistics through RDMA netlink

Okay, applied to for-next

Thanks,
Jason