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Date:      Mon, 3 May 2021 15:30:55 -0400
From:      Allan Jude <allanjude@freebsd.org>
To:        Kevin Bowling <kevin.bowling@kev009.com>, Mark Johnston <markj@freebsd.org>
Cc:        dev-commits-src-all@freebsd.org, dev-commits-src-main@freebsd.org, src-committers@freebsd.org
Subject:   Re: git: 64881da47807 - main - ixgbe: Restore AIM support
Message-ID:  <295b05d0-58ba-6e04-6fbf-cb997c9ab112@freebsd.org>
In-Reply-To: <CAK7dMtCRTHW5f9qe-ZPaRZGaoUGNoQvLFKeMQcrDesevghEQ4g@mail.gmail.com>
References:  <202105031755.143Htj33046938@gitrepo.freebsd.org> <CAK7dMtCRTHW5f9qe-ZPaRZGaoUGNoQvLFKeMQcrDesevghEQ4g@mail.gmail.com>

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On 5/3/2021 2:12 PM, Kevin Bowling wrote:
> Should we enable this by default?  My primary concern in the review is
> not making things like this require expert tuning.  If it is expected to
> be necessary, which Gallatin@ makes a case for, let’s toggle it on by
> default.
> 
> On Mon, May 3, 2021 at 10:56 AM Mark Johnston <markj@freebsd.org
> <mailto:markj@freebsd.org>> wrote:
> 
>     The branch main has been updated by markj:
> 
>     URL:
>     https://cgit.FreeBSD.org/src/commit/?id=64881da478071431a2d9e62613997a5772c56cdf
>     <https://cgit.FreeBSD.org/src/commit/?id=64881da478071431a2d9e62613997a5772c56cdf>;
> 
>     commit 64881da478071431a2d9e62613997a5772c56cdf
>     Author:     Sai Rajesh Tallamraju <stallamr@netapp.com
>     <mailto:stallamr@netapp.com>>
>     AuthorDate: 2021-05-03 17:45:00 +0000
>     Commit:     Mark Johnston <markj@FreeBSD.org>
>     CommitDate: 2021-05-03 17:47:14 +0000
> 

It looks like AIM was on by default in 11.x and earlier:
hw.ix.enable_aim: 1
hw.igb.enable_aim: 1

So I think enabling it does make sense in light of Drew's comments about
mbuf sorting only being useful in the face of something like AIM where
there will be a sufficient number of mbufs to sort.

-- 
Allan Jude



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