On 15 Jan 2001, Zlatko Calusic wrote:
> "Vlad Bolkhovitine" <[EMAIL PROTECTED]> writes:
>
> > Here is updated info for 2.4.1pre3:
> >
> > Size is MB, BlkSz is Bytes, Read, Write, and Seeks are MB/sec
> >
> > with mmap()
> >
> > File Block Num Seq Read Rand Read Seq Write Rand Write
> > Dir Size Size Thr Rate (CPU%) Rate (CPU%) Rate (CPU%) Rate (CPU%)
> > ------- ------ ------- --- ----------- ----------- ----------- -----------
> > . 1024 4096 2 1.089 1.24% 0.235 0.45% 1.118 4.11% 0.616 1.41%
> >
> > without mmap()
> >
> > File Block Num Seq Read Rand Read Seq Write Rand Write
> > Dir Size Size Thr Rate (CPU%) Rate (CPU%) Rate (CPU%) Rate (CPU%)
> > ------- ------ ------- --- ----------- ----------- ----------- -----------
> > . 1024 4096 2 28.41 41.0% 0.547 1.15% 13.16 16.1% 0.652 1.46%
> >
> >
> > Mmap() performance dropped dramatically down to almost unusable level. Plus,
> > system was unusable during test: "vmstat 1" updated results every 1-2 _MINUTES_!
> >
>
> You need Marcelo's patch. Please apply and retest.
My box thinks quite highly of that patch fwiw, but insists that he needs
to apply Jens Axboes' blk patch first ;-) (Not because of tiobench)
-Mike
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