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    SubjectRE: IDE0 /dev/hda performance hit in 2217 on my HW - more info - maybe extended partitions
    Date
    It seems to be the output of vmstat that isn't matching things.  First it
    says
    it's getting near 10M/s, but if you divide 128M/27 seconds, it's more like
    4.7.
    So where is the time being wasted? It's not in cpu either.

    Now lets look at hda7 where vmstat reported 2-3meg/sec. Again, the math
    says it's a rate near 5. So it still doesn't make sense.



    > -----Original Message-----
    > From: linux-kernel-owner@vger.kernel.org
    > [mailto:linux-kernel-owner@vger.kernel.org]On Behalf Of Andries Brouwer
    > Sent: Monday, November 13, 2000 4:59 PM
    > To: LA Walsh
    > Cc: lkml
    > Subject: Re: IDE0 /dev/hda performance hit in 2217 on my HW - more info
    > - maybe extended partitions
    >
    >
    > On Mon, Nov 13, 2000 at 03:47:27PM -0800, LA Walsh wrote:
    >
    > > Some further information in response to a private email, I did
    > hdparm -ti
    > > under both
    > > 2216 and 2217 -- they are identical -- this may be something weird
    > > w/extended partitions...
    >
    > What nonsense. There is nothing special with extended partitions.
    > Partitions influence the logical view on the disk, but not I/O.
    >
    > (But the outer rim of a disk is faster than the inner side.)
    >
    > Moreover, you report elapsed times
    > 0:27, 0:22, 0:24, 0:28, 0:21, 0:24, 0:27
    > where is this performance hit?
    > -
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