dtrace users opinion solicited (timestamps)

Andriy Gapon avg at freebsd.org
Fri Jul 10 05:45:42 UTC 2009

on 09/07/2009 22:39 David Schultz said the following:
> Doesn't Solaris DTRT and compensate for TSC frequency changes?
> Why can't we do the same thing?

That very well may be. I haven't thoroughly checked but I think that even we are
 doing the right thing when we use TSC as a timecounter.
But at this moment I am looking for a quick/simple and "sufficiently good" fix
for the bigger problems with DTrace timestamping (kern/127441).

Another side of the "simplicity" is that the timestamp function for DTrace needs
to be fast and should not itself be probed.

Andriy Gapon

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