Re: IDE performance drop between 2.4.23 and 2.6.0 - pinpointed!

["szonyi calin" <caszonyi@yahoo.com>]

 --- Pawel Dziekonski <pawel.dziekonski@pwr.wroc.pl> a écrit : >
hi,
> 
> same problem here however it seems that i have pinpointed it
> )at least
> for me):
> 

from the manpage of hdparm:
       -t     Perform timings of device reads for benchmark and 
compari-
              son  purposes.   For  meaningful  results,  this 
operation
              should be repeated 2-3 times on an otherwise
inactive  sys-
              tem  (no  other active processes) with at least a
couple of
              megabytes of free memory. 
 

if the above conditions are not met your test is irrelevant 

> funny (? ;-) thing is that under 2.4 i have same issue...
> 
> my chipset is kt133 (via), i use uhci.
> 
> root@localhost:~ # cat /proc/interrupts 
>            CPU0       
>   0:    2283127          XT-PIC  timer
>   1:       4896          XT-PIC  i8042
>   2:          0          XT-PIC  cascade
>   8:          1          XT-PIC  rtc
>   9:          0          XT-PIC  acpi
>  10:          0          XT-PIC  eth0, VIA686A
>  11:     271497          XT-PIC  uhci_hcd, uhci_hcd
>  12:     171840          XT-PIC  bttv0, nvidia
>  14:      33427          XT-PIC  ide0
>  15:          1          XT-PIC  ide1
> NMI:          0 
> ERR:          4
> 
> tested under pure 2.6.0.  ac scheduler, same under noop and
> dead.
> 
> regards, Pawel
> 
> ps. i read the list via www so cc my the replies please.
> thanks.
> -- 
> Pawel Dziekonski <pawel.dziekonski|@|pwr.wroc.pl>, KDM WCSS
> avatar:0:0:
> Wroclaw Networking & Supercomputing Center, HPC Department
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