lkml.org 
[lkml]   [2008]   [Apr]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [RESEND][RFC] BFQ I/O Scheduler
    Aaron Carroll ha scritto:
    > You still end up with reduced global throughput as
    > you've shown in the ``Short-term time guarantees'' table. It is an
    > interesting case though... since the lower performance is not though
    > fault
    > of the process it doesn't seem fair to ``punish'' it.
    Just a note about that table. The lower aggregate throughput of bfq is
    due to the fact that, because of the higher number of movies being read,
    a higher percentage of not-that-profitable accesses is being performed
    under bfq wrt to cfq. As shown in the complete logs of the aggregate
    throughput in the raw results, the aggregate throughput with bfq and cfq
    is practically the same when the number of movies is the same.
    The figure in the "Aggregate throughput" subsection is probably best
    suited for a comparison of the performance of the two schedulers with
    sequential accesses under the same conditions (the figure refers to the
    2, 128 MB long, files, but we got virtually the same results in all the
    other tests).
    I do agree on that these experiments should be repeated with different
    (faster) devices.

    Paolo
    >
    > -- Aaron
    >
    >




    \
     
     \ /
      Last update: 2008-04-17 17:21    [W:2.917 / U:0.020 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site