WPIRoboticsProjects/GRIP

Austin Bennett

@ZeusChops

Okay, so it at least narrows it to something funny with arch then.

Austin Bennett

@ZeusChops

I'm having troubles creating an Arch linux vm to test GRIP on to verify if its an arch linux-specific thing. Can you post the log file(s) from GRIP somewhere? (pastebin, or github gist ) @johnyburd

Jonathan Buchanan

@johnyburd

https://gist.github.com/johnyburd/411e0642940bdf8a3c75de6df788ce16

that's the result of ./gradlew :ui:run --debug > log.txt

Sam Carlberg

@SamCarlberg

--debug is for debugging Gradle, it's not something of ours

Jonathan Buchanan

@johnyburd

oh whoops

you probably don't want to look through all 5000 lines of that

Sam Carlberg

@SamCarlberg

Not really

Jonathan Buchanan

@johnyburd

so that without debug is what you want though?

Sam Carlberg

@SamCarlberg

It probably won't be useful

Are you familiar with the VisualVM app?

Jonathan Buchanan

@johnyburd

Sam Carlberg

@SamCarlberg

It's a useful tool for profiling memory and CPU use for Java programs. You can download it here

Jonathan Buchanan

@johnyburd

I just installed it. I'm not sure where to get the file I need to analyze though

Sam Carlberg

@SamCarlberg

If you run GRIP, it'll show up in the left-hand pane. Probably as "local application" if you're launching the native app

Jonathan Buchanan

@johnyburd

okay I got grip.ui.main and graddlewrapper

Sam Carlberg

@SamCarlberg

double-click the grip.ui.main one

then open the "monitor" tab

Jonathan Buchanan

@johnyburd

okay

Sam Carlberg

@SamCarlberg

Now add the webcam source and see if the heap use or size increase

Jonathan Buchanan

@johnyburd

the size is increasing but not the use

Sam Carlberg

@SamCarlberg

What's the total size of the heap? And what's the total memory use according to your system?

Jonathan Buchanan

@johnyburd

the heap size was ~1 GB

my system said closer to 6 GB

I had to close it before it crashed

Sam Carlberg

@SamCarlberg

What JDK do you have installed?

Jonathan Buchanan

@johnyburd

the metaspace never got bigger btw

Sam Carlberg

@SamCarlberg

Metaspace almost never increases, that's for stuff like classes that get loaded

Jonathan Buchanan

@johnyburd

jre8-openjdk 8.u112-1

Sam Carlberg

@SamCarlberg

Okay. This is because the OpenCV native objects aren't getting freed up soon enough. We've set up GRIP to periodically prompt the JVM to run garbage collection, but it's not always guaranteed to run. Your version of the JVM doesn't seem to want to run GC often enough

And you still have this problem with the native GRIP app we distribute?

Jonathan Buchanan

@johnyburd

uh, the only thing I've used is whatever is on github

Sam Carlberg

@SamCarlberg

The .deb file from here

Jonathan Buchanan

@johnyburd

uhh arch doesn't normally use dpkg

though I suppose I could try that

Sam Carlberg

@SamCarlberg

If you're just running GRIP from Gradle, you can also limit the heap size with ./gradlew :ui:run -PjvmArgs=['-Xmx200M']

Jonathan Buchanan

@johnyburd

hmm. my gradle doesn't recognize that as an option

Sam Carlberg

@SamCarlberg

Sorry, it should be ./gradlew :ui:run -PjvmArgs="-Xmx200M"

Though that still won't fix the GC problem, it will help the memory usage. You could also add -Xmaxsize=16m in the jvmArgs string

Jonathan Buchanan

@johnyburd

the second one caused it to fail

Sam Carlberg

@SamCarlberg

Whoops. -XX:MaxNewSize=16M

JVM arguments are weird

Jonathan Buchanan

@johnyburd

haha yeah

Jonathan Buchanan

@johnyburd

well

that didn't fix it

the heap size is staying constant but my system memory still rises

Sam Carlberg

@SamCarlberg

Still crashing?

Jonathan Buchanan

@johnyburd

I didn't leave it that long but it was still collecting

it's rather a pain to let it crash because it freezes my whole system

Sam Carlberg

@SamCarlberg

@JLLeitschuh https://github.com/WPIRoboticsProjects/GRIP/compare/master...SamCarlberg:better-logging

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