Anyone tried this with the 2017 installs yet? We are not one of the 2018 beta teams, so we’re running everything installed per the 2017 instructions. No licencing action was performed on the roboRIO - do I need to configure a YourKit licence before running anything? It does bring up the question, why was YourKit attempting to launch a GUI? This is reasonable to me, as there is no GUI on the roboRIO.
YOURKIT JAVA PROFILER VS JPROFILER SERIAL
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YOURKIT JAVA PROFILER VS JPROFILER PATCH
Download YourKit Java Profiler v8.0.6 MacOSX and Patch keymaker by DVT at our cracksguru database. JProfilers intuitive GUI helps you find performance bottlenecks, pin down memory leaks and resolve threading issues. –Both resulted in Java throwing an error related to javax/swing components being not found. JProfiler is an award-winning all-in-one Java profiler. Attempted to fire up yjp.jar per the initial screenshot, as well as by launching yjp.sh (per online instructions) Unzipped the linux version onto a flash drive, SSH’ed into the roboRIO as admin, copied tools.jar out of jre64 into JAVA_HOME/lib/ext, re-opened SSH as lvuser. We’ll work with it for now, but I’m curious how other teams have it? Sponsorship? Or budget to pay for the individual seat licences? YourKit seems to only have a 15-day free trial. Thus if the top of the call stack is sitting at an event wait (sleeps in most architectures are a queued timer that fires an event, followed by a wait for that event to happen), that should show up inside your routine, but it should also show the time spent in the system sleep routine.Īlrighty, so we gave this a shot last night. Profilers, as a rule, wake up at a fixed interval and look at the PC, and the PCs in the call stack, and record them. The CPU wasn’t my goal for profiling, the memory was.
Can you filter out any method that eventually calls a Thread.sleep() (including the wpilib lay() method)? That may give you a better understanding of what code is actually eating CPU. I suspect that across all cycles of your robot, the NavX spent all but about 150ms asleep - meaning it took about 150ms of CPU time over 30 seconds. I suspect the profiler is calculating the time spent in each method call as raw, which effectively means the thread that the NavX software starts will be counted for the entirety of its instantiation, even though the thread asleep for most of the time. Standard caveats about System.nanoTime() apply, but navx.getAngle() calls seem to be pretty fast. I think I know what’s throwing me off - the applications I’ve profiled don’t typically call Thread.sleep(). I believe they do ignore the first run of each function, but you could check the specifics if you wanted. regarding the profiling, YourKit is the industry standard for java profiling - they do a lot more than JProfiler can.
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