Re: [gentoo-user] Video sometimes stuttering. Need help with ionice, maybe?

[Michael <confabulate@kintzios.com>]

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On Thursday, 31 July 2025 12:25:01 British Summer Time Dale wrote:
> Peter Humphrey wrote:
> > On Wednesday, 30 July 2025 18:25:00 British Summer Time Dale wrote:
> >> I rebooted the new kernel and the BFQ setting is doing a GREAT job.  I've
> >> copied several GBs of data since the change and my videos play like a
> >> champ.  I've yet to see a single stutter or pause.
> > 
> > Have you selected either of the other schedulers as well?
> 
> From my understanding, you can only select one at a time.  So far, this
> is working wonderfully.  A lot better than the previous one.  What
> scheduler ones uses depends on what one needs.  For some applications,
> others may work better.  For what I need, BFQ is awesome. 
> 
> Can one use more than one at a time?
> 
> Dale
> 
> :-)  :-) 

With more than one scheduler trying to manage the IO data queues on the 
device, which scheduler will win the fight?  The scheduler which messes up the 
others' queues faster?  LOL!  :-)

On multi-queue SSDs the difference between IO schedulers is small, so setting 
it to none (noop) removes any pointless kernel load.  However, some have 
reported mq-deadline performed slightly better on their gear.

A quick test will prove what scheduler suits best each use case.

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