lkml.org 
[lkml]   [2019]   [Sep]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCHSET block/for-next] IO cost model based work-conserving porportional controller
    On Mon, Sep 02, 2019 at 05:45:50PM +0200, Paolo Valente wrote:
    > Thanks for this extra explanations. It is a little bit difficult for
    > me to understand how the min/max teaks for exactly, but you did give
    > me the general idea.

    It just limits how far high and low the IO issue rate, measured in
    cost, can go. ie. if max is at 200%, the controller won't issue more
    than twice of what the cost model says 100% is.

    > Are these results in line with your expectations? If they are, then
    > I'd like to extend benchmarks to more mixes of workloads. Or should I
    > try some other QoS configuration first?

    They aren't. Can you please include the content of io.cost.qos and
    io.cost.model before each run? Note that partial writes to subset of
    parameters don't clear other parameters.

    Thanks.

    --
    tejun

    \
     
     \ /
      Last update: 2019-09-02 17:58    [W:3.876 / U:0.040 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site