From: Jason Gunthorpe <jgg@nvidia.com>
To: "Wan, Kaike" <kaike.wan@intel.com>
Cc: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>,
"Rimmer, Todd" <todd.rimmer@intel.com>,
"dledford@redhat.com" <dledford@redhat.com>,
"linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>
Subject: Re: [PATCH RFC 0/9] A rendezvous module
Date: Fri, 19 Mar 2021 19:35:04 -0300 [thread overview]
Message-ID: <20210319223504.GG2356281@nvidia.com> (raw)
In-Reply-To: <SN6PR11MB3311140D3CC934C5AF334E0CF4689@SN6PR11MB3311.namprd11.prod.outlook.com>
On Fri, Mar 19, 2021 at 09:58:21PM +0000, Wan, Kaike wrote:
> > On 3/19/2021 4:59 PM, Wan, Kaike wrote:
> > >> From: Jason Gunthorpe <jgg@nvidia.com>
> > >> Sent: Friday, March 19, 2021 4:55 PM
> > >> To: Rimmer, Todd <todd.rimmer@intel.com>
> > >> Cc: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>;
> > >> Wan, Oh, there is lots of stuff in UCX, I'm not surprised you
> > >> similarities to what PSM did since psm/libfabric/ucx are all solving the
> > same problems.
> > >>
> > >>>> rv seems to completely destroy alot of the HPC performance offloads
> > >>>> that vendors are layering on RC QPs
> > >>
> > >>> Different vendors have different approaches to performance and chose
> > >>> different design trade-offs.
> > >>
> > >> That isn't my point, by limiting the usability you also restrict the
> > >> drivers where this would meaningfully be useful.
> > >>
> > >> So far we now know that it is not useful for mlx5 or hfi1, that
> > >> leaves only hns unknown and still in the HPC arena.
> > > [Wan, Kaike] Incorrect. The rv module works with hfi1.
> >
> > Interesting. I was thinking the opposite. So what's the benefit? When would
> > someone want to do that?
> [Wan, Kaike] This is only because rv works with the generic Verbs
> interface and hfi1 happens to be one of the devices that implements
> the Verbs interface.
Well, it works with everything (except EFA), but that is not my point.
I said it is not useful.
Jason
next prev parent reply other threads:[~2021-03-19 22:35 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-19 12:56 [PATCH RFC 0/9] A rendezvous module kaike.wan
2021-03-19 12:56 ` [PATCH RFC 1/9] RDMA/rv: Public interferce for the RDMA Rendezvous module kaike.wan
2021-03-19 16:00 ` Jason Gunthorpe
2021-03-19 12:56 ` [PATCH RFC 2/9] RDMA/rv: Add the internal header files kaike.wan
2021-03-19 16:02 ` Jason Gunthorpe
2021-03-19 12:56 ` [PATCH RFC 3/9] RDMA/rv: Add the rv module kaike.wan
2021-03-19 12:56 ` [PATCH RFC 4/9] RDMA/rv: Add functions for memory region cache kaike.wan
2021-03-19 12:56 ` [PATCH RFC 5/9] RDMA/rv: Add function to register/deregister memory region kaike.wan
2021-03-19 12:56 ` [PATCH RFC 6/9] RDMA/rv: Add connection management functions kaike.wan
2021-03-19 12:56 ` [PATCH RFC 7/9] RDMA/rv: Add functions for RDMA transactions kaike.wan
2021-03-19 12:56 ` [PATCH RFC 8/9] RDMA/rv: Add functions for file operations kaike.wan
2021-03-19 12:56 ` [PATCH RFC 9/9] RDMA/rv: Integrate the file operations into the rv module kaike.wan
2021-03-19 13:53 ` [PATCH RFC 0/9] A rendezvous module Jason Gunthorpe
2021-03-19 14:49 ` Wan, Kaike
2021-03-19 15:48 ` Jason Gunthorpe
2021-03-19 19:22 ` Dennis Dalessandro
2021-03-19 19:44 ` Jason Gunthorpe
2021-03-19 20:12 ` Rimmer, Todd
2021-03-19 20:26 ` Jason Gunthorpe
2021-03-19 20:46 ` Rimmer, Todd
2021-03-19 20:54 ` Jason Gunthorpe
2021-03-19 20:59 ` Wan, Kaike
2021-03-19 21:28 ` Dennis Dalessandro
2021-03-19 21:58 ` Wan, Kaike
2021-03-19 22:35 ` Jason Gunthorpe [this message]
2021-03-19 22:57 ` Rimmer, Todd
2021-03-19 23:06 ` Jason Gunthorpe
2021-03-20 16:39 ` Dennis Dalessandro
2021-03-21 8:56 ` Leon Romanovsky
2021-03-21 16:24 ` Dennis Dalessandro
2021-03-21 16:45 ` Jason Gunthorpe
2021-03-21 17:21 ` Dennis Dalessandro
2021-03-21 18:08 ` Jason Gunthorpe
2021-03-22 15:17 ` Rimmer, Todd
2021-03-22 16:47 ` Jason Gunthorpe
2021-03-22 17:31 ` Hefty, Sean
2021-03-23 22:56 ` Jason Gunthorpe
2021-03-23 23:29 ` Rimmer, Todd
2021-03-21 19:19 ` Wan, Kaike
2021-03-23 15:36 ` Christoph Hellwig
2021-03-23 15:35 ` Christoph Hellwig
2021-03-23 15:33 ` Christoph Hellwig
2021-03-23 15:30 ` Christoph Hellwig
2021-03-23 15:46 ` Jason Gunthorpe
2021-03-23 16:07 ` Christoph Hellwig
2021-03-23 17:25 ` Rimmer, Todd
2021-03-23 17:44 ` Jason Gunthorpe
2021-03-19 20:18 ` Dennis Dalessandro
2021-03-19 20:30 ` Jason Gunthorpe
2021-03-19 20:34 ` Hefty, Sean
2021-03-21 12:08 ` Jason Gunthorpe
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