Messages in this thread |  | | Date | Wed, 13 Sep 2000 01:27:31 +0200 | From | Martin Dalecki <> | Subject | Re: (reiserfs) Re: More on 2.2.18pre2aa2 |
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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/
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