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From: Dennis Dalessandro <dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
To: Moni Shoua <monis-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Cc: Steve Wise
	<swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>,
	Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
	linux-rdma <linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	Matan Barak <matanb-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>,
	leon-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org,
	Majd Dibbiny <majd-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>,
	Liran Liss <liranl-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Subject: Re: [PATCH rdma-next 00/29] Soft RoCE driver
Date: Thu, 9 Jun 2016 10:45:55 -0400	[thread overview]
Message-ID: <20160609144554.GA14212@phlsvsds.ph.intel.com> (raw)
In-Reply-To: <CAG9sBKPa0qQ4uuhoWLfZaXP9E+DnLrkOcU-2yNXbdZFQKppN8w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>

On Thu, Jun 09, 2016 at 04:17:15PM +0300, Moni Shoua wrote:
>2.  Trying to force SoftRoCE on this model will end up with rxe driver
>registers to rvt with all ib_device hooks implemented. This makes the
>reason to use rvt irrelevant in this case.

Everything? What about AH, MR, PD? Aren't those pretty generic constructs.  
In fact you folks submitted the change for AH.

>3.  Modifying rvt model to make it more suitable for a generic lower
>driver model can have a big effect on QIB/HF1 performance. This
>probably will raise objections from QIB/HF1 owners. In that context I
>want to say that attempts to influence rvt model months ago, when rvt
>was still an idea, were rejected with this exact reason (being bad for
>QIB/HF1 performance).

Yes, performance trumps, that's the nature of the game.

I'm not saying that you have to use rdmavt, however I believe it could be 
possible.  Also I want to make it clear that we are not against changes in 
rdmavt to further its use in other drivers. In fact quite the contrary.  
Changes are welcomed, of course with the caveat that it does not harm 
performance.

-Denny
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  parent reply	other threads:[~2016-06-09 14:45 UTC|newest]

Thread overview: 67+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-02 16:57 [PATCH rdma-next 00/29] Soft RoCE driver Moni Shoua
     [not found] ` <1464886657-14258-1-git-send-email-monis-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2016-06-02 16:57   ` [PATCH rdma-next 01/29] IB/rxe: IBA header types and methods Moni Shoua
2016-06-02 16:57   ` [PATCH rdma-next 02/29] IB/rxe: Bit mask and lengths declaration for different opcodes Moni Shoua
2016-06-02 16:57   ` [PATCH rdma-next 03/29] IB/rxe: Default rxe device and port parameters Moni Shoua
2016-06-02 16:57   ` [PATCH rdma-next 04/29] IB/rxe: External interface to lower level modules Moni Shoua
2016-06-02 16:57   ` [PATCH rdma-next 05/29] IB/rxe: Misc local interfaces between files Moni Shoua
2016-06-02 16:57   ` [PATCH rdma-next 06/29] IB/rxe: Add maintainer for rxe driver Moni Shoua
2016-06-02 16:57   ` [PATCH rdma-next 07/29] IB/rxe: Work request's opcode information table Moni Shoua
2016-06-02 16:57   ` [PATCH rdma-next 08/29] IB/rxe: User/kernel shared queues infrastructure Moni Shoua
2016-06-02 16:57   ` [PATCH rdma-next 09/29] IB/rxe: Common user/kernel queue implementation Moni Shoua
2016-06-02 16:57   ` [PATCH rdma-next 10/29] IB/rxe: Interface to ib_core Moni Shoua
2016-06-02 16:57   ` [PATCH rdma-next 11/29] IB/rxe: Allocation pool for RDMA objects Moni Shoua
     [not found]     ` <1464886657-14258-12-git-send-email-monis-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2016-06-15 16:17       ` Steve Wise
2016-06-15 16:45         ` Steve Wise
2016-06-15 16:54           ` Moni Shoua
2016-06-19 15:01           ` Yonatan Cohen
     [not found]             ` <8806657f-7aaa-03a3-8cb4-d04ad03a4822-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2016-06-20 21:18               ` Steve Wise
2016-06-15 16:52         ` Moni Shoua
2016-06-02 16:57   ` [PATCH rdma-next 12/29] IB/rxe: RXE tasks handling Moni Shoua
2016-06-02 16:57   ` [PATCH rdma-next 13/29] IB/rxe: Address vector manipulation functions Moni Shoua
2016-06-02 16:57   ` [PATCH rdma-next 14/29] IB/rxe: Shared Receive Queue (SRQ) " Moni Shoua
2016-06-02 16:57   ` [PATCH rdma-next 15/29] IB/rxe: Completion Queue (CQ) " Moni Shoua
2016-06-02 16:57   ` [PATCH rdma-next 16/29] IB/rxe: Queue Pair (QP) handling Moni Shoua
2016-06-02 16:57   ` [PATCH rdma-next 17/29] IB/rxe: Memory Region (MR) manioulation Moni Shoua
     [not found]     ` <1464886657-14258-18-git-send-email-monis-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2016-06-03  5:24       ` Christoph Hellwig
     [not found]         ` <20160603052440.GA31196-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2016-06-05 13:25           ` Moni Shoua
2016-06-02 16:57   ` [PATCH rdma-next 18/29] IB/rxe: Add multicast infrastructure Moni Shoua
2016-06-02 16:57   ` [PATCH rdma-next 19/29] IB/rxe: Received packets handling Moni Shoua
2016-06-02 16:57   ` [PATCH rdma-next 20/29] IB/rxe: Completion handling Moni Shoua
2016-06-02 16:57   ` [PATCH rdma-next 21/29] IB/rxe: QP request handling Moni Shoua
2016-06-02 16:57   ` [PATCH rdma-next 22/29] IB/rxe: QP response handling Moni Shoua
2016-06-02 16:57   ` [PATCH rdma-next 23/29] IB/rxe: Dummy DMA callbacks for RXE device Moni Shoua
2016-06-02 16:57   ` [PATCH rdma-next 24/29] IB/rxe: Invariant CRC implementation Moni Shoua
2016-06-02 16:57   ` [PATCH rdma-next 25/29] IB/rxe: Module init hooks Moni Shoua
2016-06-02 16:57   ` [PATCH rdma-next 26/29] IB/rxe: Interface to netdev stack Moni Shoua
     [not found]     ` <1464886657-14258-27-git-send-email-monis-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2016-06-02 17:31       ` Jason Gunthorpe
     [not found]         ` <20160602173158.GA17320-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-06-05  9:42           ` Moni Shoua
2016-06-02 16:57   ` [PATCH rdma-next 27/29] IB/rxe: sysfs interface to RXE Moni Shoua
     [not found]     ` <1464886657-14258-28-git-send-email-monis-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2016-06-03  6:00       ` Bart Van Assche
     [not found]         ` <47f2db91-1d9a-148b-f57c-1b0a3e62d95b-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>
2016-06-05  9:34           ` Moni Shoua
2016-06-02 16:57   ` [PATCH rdma-next 28/29] IB/rxe: Shared objects between user and kernel Moni Shoua
     [not found]     ` <1464886657-14258-29-git-send-email-monis-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2016-06-09  6:09       ` Leon Romanovsky
     [not found]         ` <20160609060931.GM3663-2ukJVAZIZ/Y@public.gmane.org>
2016-06-13  7:22           ` Moni Shoua
2016-06-02 16:57   ` [PATCH rdma-next 29/29] IB/rxe: Add Soft-RoCE to kbuild and makefiles Moni Shoua
2016-06-02 18:05   ` [PATCH rdma-next 00/29] Soft RoCE driver Steve Wise
2016-06-08 17:25     ` Hefty, Sean
2016-06-09 13:17     ` Moni Shoua
     [not found]       ` <CAG9sBKPa0qQ4uuhoWLfZaXP9E+DnLrkOcU-2yNXbdZFQKppN8w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-06-09 14:45         ` Dennis Dalessandro [this message]
     [not found]           ` <20160609144554.GA14212-W4f6Xiosr+yv7QzWx2u06xL4W9x8LtSr@public.gmane.org>
2016-06-09 15:12             ` Moni Shoua
2016-06-09 19:16             ` Leon Romanovsky
     [not found]               ` <20160609191608.GA5408-2ukJVAZIZ/Y@public.gmane.org>
2016-06-09 19:47                 ` Dennis Dalessandro
     [not found]                   ` <20160609194758.GA9017-W4f6Xiosr+yv7QzWx2u06xL4W9x8LtSr@public.gmane.org>
2016-06-12  9:51                     ` Moni Shoua
     [not found]                       ` <CAG9sBKN3+Yf7dUG0ORNFNG=j+AgR1eq5mvPQxx6jZEXEGRpk3w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-06-13 15:08                         ` Hefty, Sean
     [not found]                           ` <1828884A29C6694DAF28B7E6B8A82373AB0617C2-P5GAC/sN6hkd3b2yrw5b5LfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2016-06-14 15:31                             ` Moni Shoua
2016-06-03  5:25   ` Christoph Hellwig
     [not found]     ` <20160603052539.GB31196-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2016-06-08  8:49       ` Moni Shoua
     [not found]         ` <CAG9sBKN9HQKhRgXWZ8JJwwUdEBaP9VnGwr790C=q4w0XDxkbtw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-06-08  9:52           ` Nicholas A. Bellinger
     [not found]             ` <1465379530.5365.91.camel-XoQW25Eq2zviZyQQd+hFbcojREIfoBdhmpATvIKMPHk@public.gmane.org>
2016-06-08 10:41               ` Leon Romanovsky
     [not found]                 ` <20160608104123.GJ3663-2ukJVAZIZ/Y@public.gmane.org>
2016-06-08 12:20                   ` Doug Ledford
     [not found]                     ` <5e1bd9ce-f802-9237-14a0-7cdc2be5089b-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-06-08 13:10                       ` Leon Romanovsky
2016-06-08 12:27           ` Sagi Grimberg
     [not found]             ` <57580F4D.10802-ImC7XgPzLAfvYQKSrp0J2Q@public.gmane.org>
2016-06-08 13:53               ` Steve Wise
2016-06-03 17:04   ` Christoph Lameter
     [not found]     ` <alpine.DEB.2.20.1606031203510.30612-wcBtFHqTun5QOdAKl3ChDw@public.gmane.org>
2016-06-05 13:30       ` Moni Shoua
2016-06-08 16:51   ` Steve Wise
2016-06-08 17:40     ` Steve Wise
2016-06-09  7:05       ` Moni Shoua

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