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From: "Wan, Kaike" <kaike.wan@intel.com>
To: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>,
	"Jason Gunthorpe" <jgg@nvidia.com>,
	"Rimmer, Todd" <todd.rimmer@intel.com>
Cc: "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 21:58:21 +0000	[thread overview]
Message-ID: <SN6PR11MB3311140D3CC934C5AF334E0CF4689@SN6PR11MB3311.namprd11.prod.outlook.com> (raw)
In-Reply-To: <29607fd4-906d-7d0d-2940-62ff5c8c9ec6@cornelisnetworks.com>


> From: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
> Sent: Friday, March 19, 2021 5:28 PM
> To: Wan, Kaike <kaike.wan@intel.com>; Jason Gunthorpe <jgg@nvidia.com>;
> Rimmer, Todd <todd.rimmer@intel.com>
> Cc: dledford@redhat.com; linux-rdma@vger.kernel.org
> Subject: Re: [PATCH RFC 0/9] A rendezvous module
> 
> 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.
> 
> -Denny

  reply	other threads:[~2021-03-19 21:59 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 [this message]
2021-03-19 22:35                         ` Jason Gunthorpe
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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