lkml.org 
[lkml]   [2003]   [Feb]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: stochastic fair queueing in the elevator [Re: [BENCHMARK] 2.4.20-ck3 / aa / rmap with contest]
    Andrea Arcangeli wrote:

    >On Mon, Feb 10, 2003 at 10:53:27PM +1100, Nick Piggin wrote:
    >
    >>Andrew Morton wrote:
    >>
    >>
    >>>Andrea Arcangeli <andrea@suse.de> wrote:
    >>>
    >>>
    >>>>It's the readahead in my tree that allows the reads to use the max scsi
    >>>>command size. It has nothing to do with the max scsi command size
    >>>>itself.
    >>>>
    >>>>
    >>>Oh bah.
    >>>
    >>>- *max_ra++ = vm_max_readahead;
    >>>+ *max_ra = ((128*4) >> (PAGE_SHIFT - 10)) - 1;
    >>>
    >>>
    >>>Well of course that will get bigger bonnie numbers, for exactly the reasons
    >>>I've explained. It will seek between files after every 512k rather than
    >>>after every 128k.
    >>>
    >>>
    >>Though Andrea did say it is a "single threaded" streaming read.
    >>
    >
    >yes, I pointed you to bonnie read sequential in bigbox.html, not
    >tiobench.
    >
    The same pattern is also observed with single threaded tiobench
    anyway.

    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2005-03-22 13:33    [W:0.020 / U:5.792 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site