From: Jason Gunthorpe <jgg@nvidia.com>
To: "Marciniszyn, Mike" <mike.marciniszyn@cornelisnetworks.com>
Cc: "Dalessandro, Dennis" <dennis.dalessandro@cornelisnetworks.com>,
Leon Romanovsky <leon@kernel.org>,
Doug Ledford <dledford@redhat.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>
Subject: Re: [PATCH rdma-next] RDMA/rdmavt: Decouple QP and SGE lists allocations
Date: Fri, 14 May 2021 12:02:37 -0300 [thread overview]
Message-ID: <20210514150237.GJ1002214@nvidia.com> (raw)
In-Reply-To: <CH0PR01MB71533DE9DBEEAEC7C250F8F8F2509@CH0PR01MB7153.prod.exchangelabs.com>
On Fri, May 14, 2021 at 03:00:37PM +0000, Marciniszyn, Mike wrote:
> > The core stuff in ib_qp is not performance sensitive and has no obvious node
> > affinity since it relates primarily to simple control stuff.
> >
>
> The current rvt_qp "inherits" from ib_qp, so the fields in the
> "control" stuff are performance critical especially for receive
> processing and have historically live in the same allocation.
This is why I said "core stuff in ib_qp" if drivers are adding
performance stuff to their own structs then that is the driver's
responsibility to handle.
> I would in no way call these fields "simple control stuff". The
> rvt_qp structure is tuned to optimize receive processing and the
> NUMA locality is part of that tuning.
>
> We could separate out the allocation, but that misses promoting
> fields from rvt_qp that may indeed be common into the core.
>
> I know that we use the qpn from ib_qp and there may be other fields
> in the critical path.
I wouldn't worry about 32 bits when tuning for performance
Jason
next prev parent reply other threads:[~2021-05-14 15:02 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-11 10:36 [PATCH rdma-next] RDMA/rdmavt: Decouple QP and SGE lists allocations Leon Romanovsky
2021-05-11 10:59 ` Haakon Bugge
2021-05-11 12:34 ` Leon Romanovsky
2021-05-11 19:15 ` Marciniszyn, Mike
2021-05-11 19:27 ` Leon Romanovsky
2021-05-11 19:39 ` Marciniszyn, Mike
2021-05-12 4:08 ` Dennis Dalessandro
2021-05-12 12:13 ` Leon Romanovsky
2021-05-12 12:45 ` Dennis Dalessandro
2021-05-11 12:26 ` Dennis Dalessandro
2021-05-11 12:34 ` Leon Romanovsky
2021-05-12 12:25 ` Marciniszyn, Mike
2021-05-12 12:50 ` Leon Romanovsky
2021-05-13 19:03 ` Dennis Dalessandro
2021-05-13 19:15 ` Jason Gunthorpe
2021-05-13 19:31 ` Dennis Dalessandro
2021-05-14 13:02 ` Jason Gunthorpe
2021-05-14 14:07 ` Dennis Dalessandro
2021-05-14 14:35 ` Jason Gunthorpe
2021-05-14 15:00 ` Marciniszyn, Mike
2021-05-14 15:02 ` Jason Gunthorpe [this message]
2021-05-19 7:50 ` Leon Romanovsky
2021-05-19 11:56 ` Dennis Dalessandro
2021-05-19 18:29 ` Jason Gunthorpe
2021-05-19 19:49 ` Dennis Dalessandro
2021-05-19 20:26 ` Jason Gunthorpe
2021-05-20 22:02 ` Dennis Dalessandro
2021-05-21 6:29 ` Leon Romanovsky
2021-05-25 13:13 ` Jason Gunthorpe
2021-05-25 14:10 ` Dennis Dalessandro
2021-05-25 14:20 ` Jason Gunthorpe
2021-05-25 14:29 ` Dennis Dalessandro
2021-06-28 21:59 ` Marciniszyn, Mike
2021-06-28 23:19 ` Jason Gunthorpe
2021-07-04 6:34 ` Leon Romanovsky
2021-06-02 4:33 ` Leon Romanovsky
2021-05-16 10:56 ` Leon Romanovsky
2021-05-12 12:23 ` Marciniszyn, Mike
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