: Galen M. Shipman [mailto:[EMAIL PROTECTED]]Sent: Tuesday, July 26, 2005 5:55 PMTo: Tziporet KorenSubject: Re: [openib-general] Shared Receive Queue The following is from vstat.. hca_id=InfiniHost0 vendor_id=0x02C9 vendor_part_id=0x6278 hw_ver=0xA0 fw_ver
Title: RE: [openib-general] Shared Receive Queue
The performance of SRQ was improved to be identical to regular QP in the latest FW release for all devices.
Tziporet
-Original Message-
From: Galen M. Shipman [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, July 26, 2005 5:57 PM
To: Or
Right, I wasn't suggesting your software necessarily. But you seem to
think the difference is in the driver software, which doesn't seem
likely to me.
- R.
Makes sense, perhaps we will discuss this further with the mellanox
people.
Thanks,
Galen
_
I am using our own software which uses send receive in both cases. As
I said the code paths are exactly the same except for posting of
receive descriptors as well as initialization.
- Galen
On Jul 26, 2005, at 8:49 AM, Or Gerlitz wrote:
We have software which uses the mellanox shared rec
> We have software which uses the mellanox shared receive queue and we
> are seeing a substantial performance penalty (on the order of 4-5
> usec on 0 byte messages).
Are you comparing code that sends short messages either by rdma write
where the
reciever does polling on memory (as done in some I
Title: RE: [openib-general] Shared Receive Queue
which HW & FW are you using?
-Original Message-
From: Roland Dreier [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, July 26, 2005 5:38 PM
To: Galen M. Shipman
Cc: openib-general@openib.org
Subject: Re: [openib-general] Shared Receive Q
Galen> We have software which uses the mellanox shared receive
Galen> queue and we are seeing a substantial performance penalty
Galen> (on the order of 4-5 usec on 0 byte messages). I don't know
Galen> all the technical details but if you could keep this in
Galen> mind when work
Hi Roland,
We have software which uses the mellanox shared receive queue and we
are seeing a substantial performance penalty (on the order of 4-5
usec on 0 byte messages). I don't know all the technical details but
if you could keep this in mind when working on the shared receive
queue pe
Hal> A proposed API was written up a while ago (mid June). Not
Hal> sure how far along the implementation is.
I've not made much progress since then but I'll start working
seriously soon.
- R.
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On Mon, 2005-07-25 at 17:32, Galen Shipman wrote:
> Hello,
>
> I am working on some software using openib gen2 and I want to be able
> to optionally use the shared receive queue. Using ibv_create_srq, etc.
> I haven't found this API in the current trunk, what is the status of
> the shared recei
Hello,
I am working on some software using openib gen2 and I want to be able
to optionally use the shared receive queue. Using ibv_create_srq, etc.
I haven't found this API in the current trunk, what is the status of
the shared receive queue and if known, what type of performance hit
should I
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