Re: Re: Help with hdparm
On 28.08.2002 18:57:42 bob wrote:
> am slow too. But with a locally recompiled kernel things are fast. I
> don't know if the SMP flag is the difference or not.
>
> hdparm -t /dev/hda
>
> Timing buffered disk reads: 64 MB in 7.60 seconds = 8.42 MB/sec
>
> hdparm /dev/hda
>
> /dev/hda:
[...]
> I/O support = 1 (32-bit)
> unmaskirq = 1 (on)
> using_dma = 0 (off)
[...]
> But if I boot back to the kernel that I recompiled then I get the
> results I reported previously. The configuration for which I reported
> is the /boot/config-2.4.18-bf2.4 plus CONFIG_NOHIGHMEM=y and
> CONFIG_SMP=y. I did not mean to set SMP but since my main machine is
> an SMP machine I must have set that out of habit. Then it was
> recompiled with CONFIG_M386=y because I did not change that from bf24,
> which is silly, I will change that to get better optimizations.
[...]
>
> When I get time I will rebuild the kernel without SMP, and with better
> optimizations and post the results.
It is not the SMP Flag.
You do not have activated DMA in this kernel (using_dma = 0 (off))
This can be done with a kernel append line or via hdparm utility.
That's not my problem. I can switch this on. But with the faster UDMA
modes
my kernel reports IO errors and after a short while nothing goes on.
I have to switch back to slower MultiWordDMA manually.
Can you report me, which North/South-Bridge you have on your FIC SD-11
Board.
Perhaps there is our difference.
Thx
Reply to: