On Tue, 16 Jul 2003, Felipe Alfaro Solana wrote:
> On Tue, 2003-07-15 at 23:49, derek@signalmarketing.com wrote:
> > Hello,
> >
> > My ide performance seems to have dropped noticably from 2.4.x to
> > 2.6.0-pre1...
>
> What does "hdparm /dev/hde" tell us?
hdparm /dev/hde from 2.6.0-pre1
/dev/hde:
multcount = 16 (on)
IO_support = 1 (32-bit)
unmaskirq = 1 (on)
using_dma = 1 (on)
keepsettings = 0 (off)
readonly = 0 (off)
readahead = 256 (on)
geometry = 50765/16/63, sectors = 117231408, start = 0
---hdparm /dev/hde from 2.4
/dev/hde: multcount = 16 (on) IO_support = 1 (32-bit) unmaskirq = 1 (on) using_dma = 1 (on) keepsettings = 0 (off) readonly = 0 (off) readahead = 8 (on) geometry = 116301/16/63, sectors = 117231408, start = 0
I hadn't noticed the change in readahead previously, so I tried setting it to 8 in 2.6.0-pre1 with hdparm -a 8 /dev/hde
hdparm -t /dev/hde
/dev/hde: Timing buffered disk reads: 32 MB in 3.01 seconds = 10.64 MB/sec
hdparm -a 512 on the other hand...
Timing buffered disk reads: 140 MB in 3.03 seconds = 46.18 MB/sec
and I get my previous numbers back.
I guess the meaning of the parameter has changed dramatically? (what was once sectors is now bytes?) - 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/
This archive was generated by hypermail 2b29 : Tue Jul 15 2003 - 22:01:00 EST