status of autotuning freebsd for 9.2

[Alfred Perlstein]

On 7/15/13 7:13 AM, Glen Barber wrote:
> On Mon, Jul 15, 2013 at 05:48:40AM -0700, Alfred Perlstein wrote:
>> On 7/15/13 5:44 AM, Andre Oppermann wrote:
>>> On 15.07.2013 08:38, Andre Oppermann wrote:
>>>> On 13.07.2013 09:47, Alfred Perlstein wrote:
>>>>> Andre, we have a number of people running this patch in the
>>>>> following configurations:
>>>>>
>>>>> 6-8GB ram + 10gigE ethernet using iozone over NFS.
>>>> As you haven't seen any problems yet I've asked RE to green light
>>>> the MFC.
>>> RE has rejected the MFC out of fears for unexpected regressions.
>>>
>> That is unfortunate.  I guess re@ doesn't understand that FreeBSD
>> 9.2 will be unusable out of the box for doing 10gigE for more than a
>> few microseconds.
>>
>> Can we not just do my original patch that has the check for 64bit
>> pointers before unscaling maxusers?  That would be dirt simple and
>> just work with minimal risk.
>>
> IMHO, this is considered a new feature, and not a critical bug fix.  re@
> asked from the start of the code slush to avoid new features, and at
> this point, it is too late.  It is not worth introducing possible
> regressions, which will only delay the 9.2-RELEASE.
>
> Glen
>
OK, then we need a release notes telling people a sane value for 
nmbclusters and friends so that they know how to make 10gigE work.

I'll poll my team for a value if someone else has one, that would be 
even better.

-- 
Alfred Perlstein
VP Software Engineering, iXsystems