Re: System time runs very slow on RiscPC

[David Joy <lists@nonlicet.co.uk>]

On Thu, 21 Apr 2005, Peter Teichmann wrote:

> Am Mittwoch, 20. April 2005 19:48 schrieb David Joy:
> > I have just installed Debian on a StrongARM RiscPC and I have noticed that
> > the System Time seems to lose a second or more every minute. So after a
> > few hours it is hopelessly wrong.
> [snip]
> > Is this a known problem? Is there anything I can do about it?
>
> Could you have a look with hdparm if the unmaskirq flag is set for your
> harddisk/cdrom? If not, this could be the cause because it might be that
> timer interrupts are lost during disk transfers. You can try to set the flag
> then and see if it helps.
[snip]

Thanks for the suggestion. unmaskirq wasn't set on the hard disk, but I 
have tried setting it to 1 and the clock still loses time, unfortunately.

On an entirely unrelated note, do you know if it is possible to get DMA 
working on a RiscPC?

David