[uml-devel] H/W Clock in UML

[Venkatesh P. R. <vra...@co...>]

Hi,

I am using UML 2.4.20 patch 3um.  RH7.2 is running in the UML hosted on a RH9.0 system.  The host runs on a AMD processor.

The situation is I use "jiffies" to measure time in my modules inside UML.  However, the difference between the captured 
"jiffies" is 0.  One may be the operation happened fast, hence, the 0 value.  The other more concerning reason may be that 
"jiffies" is never updated.  I still need to verify the former cause.  However, I am inclined towards the latter cause because 
I get the following messages while booting UML.

Mounting proc filesystem:  [  OK  ]
Configuring kernel parameters:  [  OK  ]
modprobe: modprobe: Can't locate module char-major-10-135
hwclock is unable to get I/O port access:  the iopl(3) call failed.
Setting clock : Tue Apr 29 15:55:14 CDT 2003 [  OK  ]

Should I be concerned about the latter cause?  Is "jiffies" the correct way to measure time in UML?

waiting for reply,

-- 

Venkatesh Prasad Ranganath,
Dept. Computing and Information Science,
Kansas State University, US.
web: http://www.cis.ksu.edu/~rvprasad