Re: [RFC PATCH v4 00/13] ktask: multithread CPU-intensive kernel work

Tejun Heo
2018-11-30T19:18:19Z

Hello,

On Mon, Nov 05, 2018 at 11:55:45AM -0500, Daniel Jordan wrote:
> Michal, you mentioned that ktask should be sensitive to CPU utilization[1].
> ktask threads now run at the lowest priority on the system to avoid disturbing
> busy CPUs (more details in patches 4 and 5). Does this address your concern?
> The plan to address your other comments is explained below.

Have you tested what kind of impact this has on bandwidth of a system
in addition to latency? The thing is while this would make a better
use of a system which has idle capacity, it does so by doing more
total work. It'd be really interesting to see how this affects
bandwidth of a system too.

Thanks.

--
tejun