Re: 2.6.0 performance problems

[Bill Davidsen]

Thomas Molina wrote:
> On Mon, 29 Dec 2003, Linus Torvalds wrote:
>
>
> > On Mon, 29 Dec 2003, Thomas Molina wrote:
> >
> > > I just finished a couple of comparisons between 2.4 and 2.6 which seem to 
> > > confirm my impressions.  I understand that the comparison may not be 
> > > apples to apples and my methods of testing may not be rigorous, but here 
> > > it is.  In contrast to some recent discussions on this list, this test is 
> > > a "real world" test at which 2.6 comes off much worse than 2.4.  
> >
> > Are you sure you have DMA enabled on your laptop disk? Your 2.6.x system 
> > times are very high - much bigger than the user times. That sounds like 
> > PIO to me.
>
>
>
> Sorry.  One other bit of data from 2.6:
>
> [root@lap bitkeeper]# hdparm -i /dev/hda
>
> /dev/hda:
>
>  Model=IBM-DJSA-220, FwRev=JS4OAC3A, SerialNo=44V44FT3300
>  Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
>  RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4
>  BuffType=DualPortCache, BuffSize=1874kB, MaxMultSect=16, MultSect=16
>  CurCHS=17475/15/63, CurSects=16513875, LBA=yes, LBAsects=39070080
>  IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
>  PIO modes:  pio0 pio1 pio2 pio3 pio4
>  DMA modes:  mdma0 mdma1 mdma2
>  UDMA modes: udma0 udma1 *udma2 udma3 udma4
>  AdvancedPM=yes: mode=0x80 (128) WriteCache=enabled
>  Drive conforms to: ATA/ATAPI-5 T13 1321D revision 1:
>
>  * signifies the current active mode

What mode does 2.4 use?
--
bill davidsen <davidsen@xxxxxxx>
  CTO TMR Associates, Inc
  Doing interesting things with small computers since 1979
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