SCHED_ULE should not be the default

[Andriy Gapon]

on 19/12/2011 19:46 Ivan Klymenko said the following:
> В Sat, 17 Dec 2011 23:13:16 +0200
> Andriy Gapon <avg at FreeBSD.org> пишет:
> 
>> on 17/12/2011 19:33 George Mitchell said the following:
>>> Summing up for the record, in my original test:
>>> 1. It doesn't matter whether X is running or not.
>>> 2. The problem is not limited to two or fewer CPUs.  (It also
>>> happens for me on a six-CPU system.)
>>> 3. It doesn't require nCPU + 1 compute-bound processes, just nCPU.
>>>
>>> With nCPU compute-bound processes running, with SCHED_ULE, any other
>>> process that is interactive (which to me means frequently waiting
>>> for I/O) gets ABYSMAL performance -- over an order of magnitude
>>> worse than it gets with SCHED_4BSD under the same conditions.
>>
>> I definitely do not see anything like this.
>> Specifically:
>> - with X
>> - with 2 CPUs
>> - with nCPU and/or nCPU + 1 compute-bound processes
>> - with SCHED_ULE obviously :-)
>> I do not get "abysmal" performance for I/O active tasks.
>>
>> Perhaps there is something specific that you would want me to run and
>> measure.
>>
> 
> Well, share your experiences - what to do, what would the others were
> fine with SCHED_ULE. ;)

I didn't have to do anything special, so I am at loss as what to share.
It just works (tm) for me.
Sorry.

-- 
Andriy Gapon