lkml.org 
[lkml]   [2000]   [Sep]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: (reiserfs) Re: More on 2.2.18pre2aa2
    Andrea Arcangeli wrote:
    >
    > On Tue, 12 Sep 2000, Martin Dalecki wrote:
    >
    > >First of all: In the case of the mp3 player and such there is already a
    > >fine
    > >proper way to give it better chances on getting it's job done smooth -
    > >RT kernel sceduler priorities and proper IO buffering. I did something
    > >similiar
    > >to a GDI printer driver...
    >
    > Take 2.2.15, set a buffer of 128mbyte (of course assume your mp3 is larger
    > than 128mbyte :) and then run in background `cp /dev/zero .` in the same
    > fs where your mp3 file out of cache is living. Then you'll see why a large
    > buffer is useless if there's none kind of I/O fair scheduling into the
    > elevator. Repeat the same test in 2.2.16 then.
    >
    > The I/O latency Hans was taking about for the mp3 player, is the time it
    > takes for the buffer to become empty.

    I was talking about *proper* buffering not necessary *big* buffers.
    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2005-03-22 12:38    [W:4.750 / U:0.280 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site