>> Most profilers, including MessageTally, count stack frames at a regular >> interval. This is doomed to be inexact, non-deterministic and non-portable, >> and so, whatever the effort you will put in the thread scheduling, memory >> management or whatsoever. > > I think you're being a bit harsh on stack sampling there. It is exact > enough to drive optimisation in some really high-performance VMs. It > is also deterministic enough to yield data leading to very good > performance results in those VMs. Whether focusing on counting > messages instead of taking samples is more beneficial would have to be > determined by experiment ...
Yes, 25 pages of experiment :-) > What you mean with "non-portable" I do not understand. The information about the execution time contained in your profile cannot be compared with a new profile realized on a different machine, with a different CPU. Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.
