lkml.org 
[lkml]   [2006]   [Mar]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH 0/4] map multiple blocks in get_block() and mpage_readpages()
    Badari Pulavarty <pbadari@us.ibm.com> wrote:
    >
    > On Wed, 2006-03-01 at 17:52 -0800, Andrew Morton wrote:
    > > Badari Pulavarty <pbadari@us.ibm.com> wrote:
    > > >
    > > > I noticed decent improvements (reduced sys time) on JFS, XFS and ext3.
    > > > (on simple "dd" read tests).
    > > >
    > > > (rc3.mm1) (rc3.mm1 + patches)
    > > > real 0m18.814s 0m18.482s
    > > > user 0m0.000s 0m0.004s
    > > > sys 0m3.240s 0m2.912s
    > >
    > > With which filesystem? XFS and JFS implement a larger-than-b_size
    > > ->get_block, but ext3 doesn't. I'd expect ext3 system time to increase a
    > > bit, if anything?
    >
    > These numbers are on JFS. With the current ext3 (mainline) - I did
    > find not-really-noticible increase in sys time (due to code overhead).
    >
    > I tested on ext3 with Mingming's ext3 getblocks() support in -mm also,
    > which showed reduction in sys time.
    >

    OK, no surprises there. Things will improve when someone gets around to
    doing multi-block get_block for ext3.
    -
    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: 2006-03-03 21:36    [W:0.022 / U:62.872 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site