Messages in this thread | | | Date | Tue, 8 Jun 2021 19:46:54 +0200 | From | Peter Zijlstra <> | Subject | Re: iowait boost is broken |
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On Mon, Jun 07, 2021 at 08:10:32PM +0100, Beata Michalska wrote: > So back to the expectations. > The main problem, as I see it, is what do we actually want to achieve with > the I/O boosting? Is it supposed to compensate the time lost while waiting > for the I/O request to be completed or is is supposed to optimize the rate > at which I/O requests are being made.
The latter, you want to increase the race of submission.
> Do we want to boost I/O bound tasks by > default, no limits applied or should we care about balancing performance > vs power ? And unless those expectations are clearly stated, we might not > get too far with any changes, really.
You want to not increase power beyond what is needed to match the rate of processing I suppose.
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