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Date:      Sun, 11 Jan 2015 11:57:52 +0000
From:      Karl Pielorz <kpielorz_lst@tdx.co.uk>
To:        Hans Petter Selasky <hps@selasky.org>, freebsd-infiniband@freebsd.org
Subject:   Re: FreeBSD 11 Infiniband performance / usable?
Message-ID:  <51A71BD25A781C84FADA3344@[10.12.30.100]>
In-Reply-To: <54B1B31C.2040901@selasky.org>
References:  <E9EFD3AA27C919F9B8ADA6FB@A54336F45AB8EC4FED46DD7E> <54B1B31C.2040901@selasky.org>

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--On 11 January 2015 00:17:48 +0100 Hans Petter Selasky <hps@selasky.org> 
wrote:

> Hi,
>
> IPoIB needs to be optimized to shuffle more packets per request to and
> from the kernel basically. Currently that is not done. Are you planning
> to use IPoIB for real workloads?

Under FBSD 10 I was using it to run iSCSI using IPoIB between two boxes 
(with ZFS mounted atop of that). This worked, and performance was 'good' - 
but the boxes would eventually 'lose site' of each other [I think at least 
one other person had the issue - worse (i.e. more often) than I did]

Knowing there's been a lot of changes to IB in 11 I thought I'd give that a 
go...

I can go back to FBSD 10 - I'd need to solve the intermittent "loses site" 
issue then (with the code the 10 is running).

I guess overall - moving back to 10 is looking like the better option...

-Karl




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