On Sun, 21 Nov 1999, Steve Philp wrote:
> Axalon Bloodstone wrote:
[...]
> > With it on,
> >
> > /dev/hda:
> > Timing buffer-cache reads: 128 MB in 1.75 seconds =73.14 MB/sec
> > Timing buffered disk reads: 64 MB in 21.91 seconds = 2.92 MB/sec
> >
> > I'm not gonna switch it just to show you guys, but on hde cache reads hit
> > around 125-150, and buffered gets up to about 5-10. A mighty big
> > improvment, but....
>
> Something's mighty wrong with those readings Axalon... Here's my 18G WD:
Well like i've said i didn't mention the environment my load average at
the time was in the double digits (compileing on 6 of 12 ttys doesn't
help) :)
> [root@tippy /root]# hdparm -tT /dev/hda
>
> /dev/hda:
> Timing buffer-cache reads: 128 MB in 1.73 seconds =73.99 MB/sec
> Timing buffered disk reads: 64 MB in 3.81 seconds =16.80 MB/sec
>
> That's with:
>
> /dev/hda:
> multcount = 8 (on)
> I/O support = 1 (32-bit)
> unmaskirq = 1 (on)
> using_dma = 1 (on)
> keepsettings = 0 (off)
> nowerr = 0 (off)
> readonly = 0 (off)
> readahead = 128 (on)
> geometry = 2193/255/63, sectors = 35239680, start = 0
>
> Like I said, I'm mighty happy with these readings... just how much
> faster do I need Netscape to launch?? :)
>
Here is no load and no tweaking,
/dev/hda:
Timing buffer-cache reads: 128 MB in 1.57 seconds =81.53 MB/sec
Timing buffered disk reads: 64 MB in 17.92 seconds = 3.57 MB/sec
And no load w/ "hdparm -A1 -a128 -u1 -d1 -c1"
/dev/hda:
Timing buffer-cache reads: 128 MB in 1.65 seconds =77.58 MB/sec
Timing buffered disk reads: 64 MB in 3.89 seconds =16.45 MB/sec
--
MandrakeSoft http://www.mandrakesoft.com/
--Axalon
