Re: CFP: RDMA Microconference - Call for presentations

[Leon Romanovsky <leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>]

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On Thu, Jul 20, 2017 at 05:15:40PM +0000, Parav Pandit wrote:
>
>
> > -----Original Message-----
> > From: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org [mailto:linux-rdma-
> > owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org] On Behalf Of Dennis Dalessandro
> > Sent: Thursday, July 20, 2017 11:03 AM
> > To: Leon Romanovsky <leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>; RDMA mailing list <linux-
> > rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
> > Cc: Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>; Christoph Lameter <cl-vYTEC60ixJUAvxtiuMwx3w@public.gmane.org>;
> > Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>; Liran Liss
> > <liranl-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>; Ira Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>; Matan Barak
> > <matanb-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>; Tzahi Oved <tzahio-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
> > Subject: Re: CFP: RDMA Microconference - Call for presentations
> >
> > On 7/20/2017 12:07 AM, Leon Romanovsky wrote:
> > > REMINDER !!!!!!!
> > >
> > > On Thu, Jun 15, 2017 at 08:03:05AM +0300, Leon Romanovsky wrote:
> > >> Hi All,
> > >>
> > >> We want to point your attention to the following [1] announcement
> > >> that RDMA microconference is accepted into LPC 2017.
> > >>
> > >> This is a call for presentations for the 2nd RDMA microconference
> > >> which will be held on September 13-15 in Los Angeles, CA. The event
> > >> is intended to gather developers of the RDMA stack and the main
> > >> intent is to provide room for discussion between developers with focus on
> > resolving things.
> > >>
> > >> If you are interested to present, please submit a proposal to
> > >> leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org and/or to Linux RDMA mailing list
> > >> linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org before August 14th, 2017, at 23:59 EST.
> >
> > >
> > >
> >
> > Have exchanged a separate email thread with Leon. I am planning to attend and
> > present for a discussion on how we can add statistics to RDMA Tool. This will
> > focus on device related counters and how an architecture could look that is easy
> > to add more counters and have different counters across devices without
> > requiring a lot of updates to the user space tool.
> >
>
> I haven't synced with Leon yet, nor I have followed any past rdmatool discussion actively for statistics.
> So feel free to ignore my comment.

There were no discussion about it yet :)

>
> Having ethtool style mechanism that allows device related counters is good starting point instead of reinventing a new mechanism.
> Probably a good starting point to follow existing mechanism via 3 similar callbacks get_strings(), get_sset_count(), get_ethtool_stats().
> May be such 3 callbacks for rdamtool from ibdev.

AFAIK, (may be wrong here) the ethtool requires to allocate memory in advance.
It works not bad for small systems, but in large installations with many PF-VF
counters, it starts to be unusable due to out-of-memory failures.

Thanks

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