On Wed, Jul 04 2007, Justin Piszcz wrote:
> On Wed, 4 Jul 2007, Michael Tokarev wrote:
>
> > Tejun Heo wrote:
> >> Hello,
> >>
> >> Michael Tokarev wrote:
> >>> Well. It looks like the results does not depend on the
> >>> elevator. Originally I tried with deadline, and just
> >>> re-ran the tes
On Wed, Jul 04 2007, James Bottomley wrote:
> On Wed, 2007-07-04 at 10:19 +0900, Tejun Heo wrote:
> > Michael Tokarev wrote:
> > > Well. It looks like the results does not depend on the
> > > elevator. Originally I tried with deadline, and just
> > > re-ran the test with noop (hence the long dela
Justin Piszcz wrote:
On Wed, 4 Jul 2007, Justin Piszcz wrote:
On Wed, 4 Jul 2007, Michael Tokarev wrote:
> Tejun Heo wrote:
>> Hello,
>>
>> Michael Tokarev wrote:
>>> Well. It looks like the results does not depend on the
>>> elevator. Originally I tried with deadline, and just
>>> re-ran
Michael Tokarev wrote:
Tejun Heo wrote:
Hello,
Michael Tokarev wrote:
Well. It looks like the results does not depend on the
elevator. Originally I tried with deadline, and just
re-ran the test with noop (hence the long delay with
the answer) - changing linux elevator changes almost
nothing
On Thu, 5 Jul 2007, Bill Davidsen wrote:
Justin Piszcz wrote:
On Wed, 4 Jul 2007, Justin Piszcz wrote:
On Wed, 4 Jul 2007, Michael Tokarev wrote:
> Tejun Heo wrote:
>> Hello,
>>
>> Michael Tokarev wrote:
>>> Well. It looks like the results does not depend on the
>>> elevator. Originall
On Wed, Jul 04, 2007 at 08:17:35PM +0400, Michael Tokarev wrote:
> Dan Aloni wrote:
> > On Thu, Jun 28, 2007 at 02:51:58PM +0400, Michael Tokarev wrote:
> >> [..]
> >> Test machine was using MPTSAS driver for the following card:
> >> SCSI storage controller: LSI Logic / Symbios Logic SAS1064E PCI
Dan Aloni wrote:
> On Thu, Jun 28, 2007 at 02:51:58PM +0400, Michael Tokarev wrote:
>> [..]
>> Test machine was using MPTSAS driver for the following card:
>> SCSI storage controller: LSI Logic / Symbios Logic SAS1064E PCI-Express
>> Fusion-MPT SAS (rev 02)
>>
>> Pretty similar results were obta
On Thu, Jun 28, 2007 at 02:51:58PM +0400, Michael Tokarev wrote:
>[..]
> Test machine was using MPTSAS driver for the following card:
> SCSI storage controller: LSI Logic / Symbios Logic SAS1064E PCI-Express
> Fusion-MPT SAS (rev 02)
>
> Pretty similar results were obtained on an AHCI controlle
On Wed, 2007-07-04 at 10:19 +0900, Tejun Heo wrote:
> Michael Tokarev wrote:
> > Well. It looks like the results does not depend on the
> > elevator. Originally I tried with deadline, and just
> > re-ran the test with noop (hence the long delay with
> > the answer) - changing linux elevator chang
On Wed, 4 Jul 2007, Justin Piszcz wrote:
On Wed, 4 Jul 2007, Michael Tokarev wrote:
> Tejun Heo wrote:
>> Hello,
>>
>> Michael Tokarev wrote:
>>> Well. It looks like the results does not depend on the
>>> elevator. Originally I tried with deadline, and just
>>> re-ran the test with noop (he
On Wed, 4 Jul 2007, Michael Tokarev wrote:
Tejun Heo wrote:
Hello,
Michael Tokarev wrote:
Well. It looks like the results does not depend on the
elevator. Originally I tried with deadline, and just
re-ran the test with noop (hence the long delay with
the answer) - changing linux elevator ch
Tejun Heo wrote:
> Hello,
>
> Michael Tokarev wrote:
>> Well. It looks like the results does not depend on the
>> elevator. Originally I tried with deadline, and just
>> re-ran the test with noop (hence the long delay with
>> the answer) - changing linux elevator changes almost
>> nothing in the
Hello,
Michael Tokarev wrote:
> Well. It looks like the results does not depend on the
> elevator. Originally I tried with deadline, and just
> re-ran the test with noop (hence the long delay with
> the answer) - changing linux elevator changes almost
> nothing in the results - modulo some rando
Tejun Heo wrote:
> Michael Tokarev wrote:
[]
>> A test drive is Seagate Barracuda ST3250620AS "desktop" drive,
>> 250Gb, cache size is 16Mb, 7200RPM.
[test shows that NCQ makes no difference whatsoever]
> And which elevator?
Well. It looks like the results does not depend on the
elevator. Origi
Michael Tokarev wrote:
> [Offtopic notice: For the first time I demonstrated some
> speed testing results on linux-ide mailinglist, as a
> demonstration how [NT]CQ can help. But later, someone
> becomes curious and posted that email to lkml, asking
> for more details. Since that, I become more cu
Michael Tokarev wrote:
[]
> I'm planning to test several models of SCSI drives. On SCSI front
> (or maybe with different drives - I don't know) things are WAY more
> interesting wrt TCQ. Difference in results between 1 and 32 threads
> goes up to 4 times sometimes!. But I'm a bit stuck with SCSI
[Offtopic notice: For the first time I demonstrated some
speed testing results on linux-ide mailinglist, as a
demonstration how [NT]CQ can help. But later, someone
becomes curious and posted that email to lkml, asking
for more details. Since that, I become more curious
as well, and decided to loo
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