Messages in this thread |  | | | Date | Tue, 05 Jul 2005 12:01:40 +0200 | | From | Ondrej Zary <> | | Subject | Re: [git patches] IDE update |
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André Tomt wrote: > Al Boldi wrote: > >> Bartlomiej Zolnierkiewicz wrote: { >> >>>>> On 7/4/05, Al Boldi <a1426z@gawab.com> wrote: >>>>> Hdparm -tT gives 38mb/s in 2.4.31 >>>>> Cat /dev/hda > /dev/null gives 2% user 33% sys 65% idle >>>>> >>>>> Hdparm -tT gives 28mb/s in 2.6.12 >>>>> Cat /dev/hda > /dev/null gives 2% user 25% sys 0% idle 73% IOWAIT > > > The "hdparm doesn't get as high scores as in 2.4" is a old discussed to > death "problem" on LKML. So far nobody has been able to show it affects > anything but that pretty useless quasi-benchmark. >
No, it's not a problem with hdparm. hdparm only shows that there is _really_ a problem:
2.6.12 root@pentium:/home/rainbow# time dd if=/dev/hda of=/dev/null bs=512 count=1048576 1048576+0 records in 1048576+0 records out
real 0m32.339s user 0m1.500s sys 0m14.560s
2.4.26 root@pentium:/home/rainbow# time dd if=/dev/hda of=/dev/null bs=512 count=1048576 1048576+0 records in 1048576+0 records out
real 0m23.858s user 0m1.750s sys 0m15.180s
-- Ondrej Zary - 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/
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