Controlling probe overhead

David Smith dsmith@redhat.com
Thu Mar 15 15:35:00 GMT 2007


David Smith wrote:
>>> [...]
>>> +    << "   -O         turn off automatic probe overload handling" << 
>>> endl
>>
>> IMO, there is no need for this option.  Overload detection should
>> always be present, and tunable with the (documented?) -D parameters.
> 
> I see your point and the option would be easy enough to remove.  I just 
> thought it would be easier to make one knob to turn everything off if 
> the STP_OVERLOAD bothered your systemtap use.
> 
> Hmm, another way to completely disable the STP_OVERLOAD stuff could be 
> to do "stap -DSTP_OVERLOAD=0" (if I make one small change to the patch). 
>  I'll do that and delete the option itself.

I've made this change, but I ended up slightly modifying the above idea. 
  Now you can say "stap -DSTP_NO_OVERLOAD" to completely disable the 
overload processing.  I've attached a new patch.

-- 
David Smith
dsmith@redhat.com
Red Hat
http://www.redhat.com
256.217.0141 (direct)
256.837.0057 (fax)
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