hi
while using oprofile
I wanted to reduce the time between the samples, so I tried: 
 
# opcontrol --event=CPU_CLK_UNHALTED:30000:0:1
 
but I got in return:
 
"You cannot specify any performance counter events
because OProfile is in timer mode."
 
what does it mean?
and how can I control the sample rate?
 
thanks
Shlomi