Hi:
Some days ago, I saw a post about enabling UDMA in Linux. I used "hdparm -d1
/dev/hda", and I got an error message saying "resource busy" or something like
that.
Then, I downloaded kernel 2.2.10 and compiled it (my fisrt time compiling a
kernel), and said y to "VIA ide controller" and "enable DMA by default"......
the results were amazing. Here are the timings:
before:
/dev/hda:
multcount = 0 (off)
I/O support = 3 (32-bit w/sync)
unmaskirq = 0 (off)
using_dma = 0 (off)
keepsettings = 0 (off)
nowerr = 0 (off)
readonly = 0 (off)
readahead = 8 (on)
geometry = 1025/255/63, sectors = 16481808, start = 0
/dev/hda:
Timing buffer-cache reads: 128 MB in 3.34 seconds =38.32 MB/sec
Timing buffered disk reads: 64 MB in 9.87 seconds = 6.48 MB/sec
after:
/dev/hda:
multcount = 0 (off)
I/O support = 3 (32-bit w/sync)
unmaskirq = 0 (off)
using_dma = 1 (on)
keepsettings = 0 (off)
nowerr = 0 (off)
readonly = 0 (off)
readahead = 8 (on)
geometry = 1025/255/63, sectors = 16481808, start = 0
/dev/hda:
Timing buffer-cache reads: 128 MB in 3.36 seconds =38.10 MB/sec
Timing buffered disk reads: 64 MB in 5.20 seconds =12.31 MB/sec
I didn't know compiling the kernel was so easy, and it allows me to create a
custom kernel according to my hardware, resulting in a performance increase.
My system is:
K6-2 350 running @400Mhz
S7 motherboard with VIA MVP3 controller
96mb PC100 RAM
Diamond Stealth II G460 (i740)
Creative Ensoniq PCI (ES1371)
generic 36X cdrom
