[lkml]   [2018]   [Dec]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [RFC PATCH v4 00/13] ktask: multithread CPU-intensive kernel work
On Fri, Nov 30, 2018 at 11:18:19AM -0800, Tejun Heo wrote:
> 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.

I guess you mean something like comparing aggregate CPU time across threads to
the base single thread time for some job or set of jobs? Then no, I haven't
measured that, but I can for next time.

 \ /
  Last update: 2018-12-01 01:14    [W:0.121 / U:1.184 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site