Re: Tools for Analyzing Context Switching
On 01/08/2010 09:16 PM, archimedestrading1 wrote:
Hi -- I'm looking to see if any tools exist that will let me analyze
my multi-threaded Java program: Specifically I want a tool that'll
show me exactly when each of my threads starts and stops running. (I
have more threads than CPUs) I would like to see timings down to the
microsecond.
I doubt you will find a tool with that time resolution which is only
halfway accurate. The measurement influences the timing. ->
http://en.wikipedia.org/wiki/Uncertainty_principle
jvisualvm has a thread monitor tool but the timing
resolution doesn't appear to be very good: My threads start and stop
without the tool even realizing it.
jprofiler has pretty good thread profiling IMHO but I doubt even that
tool will give you that level of precision. What do you need that time
precision for? Usually when it comes to issues with threads it's more
interesting which threads hold which locks and block other threads.
jprofiler is pretty good at that analysis and I bet other tools (is
OptimizeIt still around?) as well.
Kind regards
robert
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