ktrace -c behavior
jmg at funkthat.com
Sun Aug 24 23:53:38 UTC 2014
Eric van Gyzen wrote this message on Fri, Aug 22, 2014 at 15:26 -0400:
> On 08/22/2014 15:20, John-Mark Gurney wrote:
> > Eric van Gyzen wrote this message on Fri, Aug 22, 2014 at 15:16 -0400:
> >> What behavior would you expect from this sequence of commands?
> >> ktrace -tw -p 1234
> >> ktrace -c -p 1234
> >> Based on this...
> >> -c Clear the trace points associated with the specified file
> >> or processes.
> > and/or just add specified:
> > Clear the specified trace points ...
> But what if I didn't specify them?
You specified the default by not specificly specifing any different
ones.. :) Confused? :)
or maybe selected?
> >> ...I would expect the second command to clear the trace point for
> >> context switches. It doesn't. I have to specify -tw with the -c to get
> >> that behavior. This makes sense; it's just not what I was expecting.
> >> Assuming we want to keep this behavior, can we clarify the -c flag in
> >> man page? I would suggest:
> >> If the -t flag is not specified, clear the default set of trace points.
> > Maybe we should add a new trace point string that is a (for all).. so
> > you can do ktrace -ta -c?
> That would be handy.
John-Mark Gurney Voice: +1 415 225 5579
"All that I will do, has been done, All that I have, has not."
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